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124th ASEE Annual Conference and Exposition

作者： Novoselich, Brian J. Hall, Janice Leshay Landry, Keith A. Main, Joyce B. Dean, Anthony W. U.S. Military Academy United States Virginia Polytechnic Institute State University United States Georgia Southern University United States Purdue University College of Engineering West Lafayette United States Old Dominion University United States

Student veterans, with their highly technical military training, may help remedy national level gaps in qualified science, technology, engineering, and mathematics (STEM) workers. Recent military education benefits and military end strength reductions have the potential to bolster the nation's engineering technician, engineering technologist, and engineer (ETETE) workforce. Recent work by the National Science Foundation indicates that supporting veteran students towards ETETE careers involves three key tasks for educators: 1) building early awareness of ETETE pathways;2) ensuring academic recognition for prior military work experience;and 3) providing seamless support from government agencies, academic institutions, and industry. Many veterans experience an abrupt and unsupportive transition from military to civilian academic pursuits, which may negatively affect their retention and persistence in the field. Among other factors, delays in education benefits, a lack of academic credit for prior work experience, and less structured academic environments all may contribute to this negative perception. The growing number of veterans pursuing STEM degrees, and the diversity of this underserved group of students continues to garner the attention of faculty and administrators in an effort to mitigate these transition challenges. The purpose of this paper is to examine the initiatives and challenges discussed by a diverse panel of military and veteran-related students, faculty, and researchers during the 2016 ASEE annual conference. The topics discussed during the panel are related to previous research regarding the challenges faced by veteran students beyond ETETE career paths to contrast similarities and differences between veteran ETETE students and their peers in other undergraduate programs. Results from this panel suggest that veteran students still struggle in navigating the transition from military to academic life and that a lack of constructive credit for military

关键词： Students

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Study of B→pp¯ππ

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Physical Review D 2020年第5期101卷 052012-052012页

作者： K. Chu M.-Z. Wang I. Adachi H. Aihara S. Al Said D. M. Asner V. Aulchenko T. Aushev R. Ayad V. Babu I. Badhrees S. Bahinipati A. M. Bakich P. Behera C. Beleño J. Bennett V. Bhardwaj B. Bhuyan J. Biswal A. Bobrov G. Bonvicini A. Bozek M. Bračko M. Campajola L. Cao D. Červenkov P. Chang V. Chekelian A. Chen B. G. Cheon K. Chilikin H. E. Cho K. Cho S.-K. Choi Y. Choi S. Choudhury D. Cinabro S. Cunliffe N. Dash F. Di Capua S. Di Carlo Z. Doležal T. V. Dong S. Eidelman D. Epifanov J. E. Fast T. Ferber A. Frey B. G. Fulsom R. Garg V. Gaur N. Gabyshev A. Garmash A. Giri P. Goldenzweig B. Golob O. Hartbrich K. Hayasaka H. Hayashii W.-S. Hou C.-L. Hsu T. Iijima K. Inami A. Ishikawa R. Itoh M. Iwasaki Y. Iwasaki W. W. Jacobs H. B. Jeon Y. Jin D. Joffe K. K. Joo G. Karyan T. Kawasaki D. Y. Kim S. H. Kim K. Kinoshita P. Kodyš S. Korpar P. Križan R. Kroeger P. Krokovny R. Kulasiri Y.-J. Kwon Y.-T. Lai I. S. Lee S. C. Lee L. K. Li L. Li Gioi J. Libby K. Lieret D. Liventsev T. Luo M. Masuda D. Matvienko M. Merola K. Miyabayashi R. Mizuk G. B. Mohanty T. Mori R. Mussa E. Nakano T. Nakano M. Nakao K. J. Nath M. Nayak N. K. Nisar S. Nishida K. Nishimura H. Ono Y. Onuki P. Oskin P. Pakhlov G. Pakhlova B. Pal T. Pang S. Pardi C. W. Park H. Park S.-H. Park S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen V. Popov E. Prencipe M. T. Prim P. K. Resmi M. Ritter A. Rostomyan N. Rout G. Russo D. Sahoo Y. Sakai S. Sandilya L. Santelj V. Savinov O. Schneider G. Schnell J. Schueler C. Schwanda Y. Seino K. Senyo M. E. Sevior C. P. Shen J.-G. Shiu E. Solovieva M. Starič Z. S. Stottler T. Sumiyoshi W. Sutcliffe M. Takizawa U. Tamponi K. Tanida F. Tenchini T. Uglov Y. Unno S. Uno P. Urquijo Y. Usov G. Varner A. Vinokurova A. Vossen B. Wang C. H. Wang P. Wang X. L. Wang J. Wiechczynski E. Won S. B. Yang H. Ye J. Yelton J. H. Yin Y. Yusa Z. P. Zhang V. Zhilich V. Zhukova V. Zhulanov Department of Physics National Taiwan University Taipei 10617 High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 SOKENDAI (The Graduate University for Advanced Studies) Hayama 240-0193 Department of Physics University of Tokyo Tokyo 113-0033 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Brookhaven National Laboratory Upton New York 11973 Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Novosibirsk State University Novosibirsk 630090 Moscow Institute of Physics and Technology Moscow Region 141700 Deutsches Elektronen-Synchrotron Hamburg 22607 King Abdulaziz City for Science and Technology Riyadh 11442 Indian Institute of Technology Bhubaneswar Satya Nagar 751007 School of Physics University of Sydney New South Wales 2006 Indian Institute of Technology Madras Chennai 600036 II. Physikalisches Institut Georg-August-Universität Göttingen 37073 Göttingen University of Mississippi University Mississippi 38677 Indian Institute of Science Education and Research Mohali SAS Nagar 140306 Indian Institute of Technology Guwahati Assam 781039 J. Stefan Institute Ljubljana 1000 Wayne State University Detroit Michigan 48202 H. Niewodniczanski Institute of Nuclear Physics Krakow 31-342 University of Maribor Maribor 2000 INFN - Sezione di Napoli Napoli 80126 Università di Napoli Federico II 80055 Napoli Institut für Experimentelle Teilchenphysik Karlsruher Institut für Technologie Karlsruhe 76131 Faculty of Mathematics and Physics Charles University Prague 121 16 Max-Planck-Institut für Physik Munich 80805 National Central University Chung-li 32054 Department of Physics and Institute of Natural Sciences Hanyang University Seoul 04763 P. N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991 Korea Institute of Science and Technology Information Daejeon 34141 Gyeongsang National University Jinju 52828 Sungkyunkwan University

Using a data sample of 772×106 BB¯ pairs collected on the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e− collider, we report the observation of B0→pp¯π+π− and the first observation of B+→pp¯π+π0. We measure a decay branching fraction of (0.83±0.17±0.17)×10−6 in B0→pp¯π+π− for Mπ+π−<1.22 GeV/c2 with a significance of 5.5 standard deviations. The contribution from B0→pp¯K0 is excluded. We measure a decay branching fraction of (4.58±1.17±0.67)×10−6 for B+→pp¯π+π0 with Mπ+π0<1.3 GeV/c2 with a significance of 5.4 standard deviations. We study the difference of the Mpp¯ distributions in B0→pp¯π+π− and B+→pp¯π+π0.

关键词： Electroweak interaction Form factors Particle interactions Strong interaction

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Dalitz analysis of D0→K−π+η decays at Belle

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Physical Review D 2020年第1期102卷 012002-012002页

作者： Y. Q. Chen L. K. Li W. B. Yan I. Adachi H. Aihara S. Al Said D. M. Asner H. Atmacan V. Aulchenko T. Aushev R. Ayad V. Babu I. Badhrees S. Bahinipati P. Behera J. Bennett V. Bhardwaj T. Bilka J. Biswal A. Bozek M. Bračko T. E. Browder M. Campajola L. Cao D. Červenkov M.-C. Chang V. Chekelian A. Chen B. G. Cheon K. Chilikin H. E. Cho K. Cho S.-K. Choi Y. Choi S. Choudhury D. Cinabro S. Cunliffe N. Dash G. De Nardo F. Di Capua Z. Doležal T. V. Dong S. Eidelman D. Epifanov J. E. Fast T. Ferber D. Ferlewicz B. G. Fulsom R. Garg V. Gaur N. Gabyshev A. Garmash A. Giri P. Goldenzweig B. Golob Y. Guan O. Hartbrich K. Hayasaka H. Hayashii W.-S. Hou C.-L. Hsu K. Inami G. Inguglia A. Ishikawa R. Itoh M. Iwasaki Y. Iwasaki W. W. Jacobs E.-J. Jang H. B. Jeon S. Jia Y. Jin K. K. Joo K. H. Kang G. Karyan T. Kawasaki D. Y. Kim S. H. Kim T. D. Kimmel K. Kinoshita P. Kodyš S. Korpar P. Križan R. Kroeger P. Krokovny T. Kuhr R. Kulasiri R. Kumar A. Kuzmin Y.-J. Kwon K. Lalwani J. S. Lange I. S. Lee S. C. Lee Y. B. Li L. Li Gioi J. Libby K. Lieret D. Liventsev J. MacNaughton C. MacQueen M. Masuda D. Matvienko M. Merola K. Miyabayashi R. Mizuk S. Mohanty M. Mrvar R. Mussa M. Nakao Z. Natkaniec M. Nayak S. Nishida S. Ogawa H. Ono P. Oskin P. Pakhlov G. Pakhlova S. Pardi H. Park S. Patra S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen T. Podobnik V. Popov E. Prencipe M. T. Prim A. Rabusov M. Ritter M. Röhrken N. Rout G. Russo D. Sahoo Y. Sakai T. Sanuki V. Savinov O. Schneider G. Schnell J. Schueler C. Schwanda A. J. Schwartz Y. Seino K. Senyo M. E. Sevior M. Shapkin V. Shebalin J.-G. Shiu A. Sokolov E. Solovieva M. Starič Z. S. Stottler M. Sumihama T. Sumiyoshi W. Sutcliffe M. Takizawa K. Tanida F. Tenchini K. Trabelsi M. Uchida T. Uglov S. Uno P. Urquijo G. Varner V. Vorobyev E. Waheed C. H. Wang E. Wang M.-Z. Wang P. Wang M. Watanabe E. Won X. Xu S. B. Yang H. Ye J. H. Yin C. Z. Yuan Y. Yusa Z. P. Zhang V. Zhilich V. Zhukova V. Zhulanov Department of Modern Physics and State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei 230026 Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 University of Cincinnati Cincinnati Ohio 45221 High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 SOKENDAI (The Graduate University for Advanced Studies) Hayama 240-0193 Department of Physics University of Tokyo Tokyo 113-0033 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Brookhaven National Laboratory Upton New York 11973 Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Novosibirsk State University Novosibirsk 630090 Moscow Institute of Physics and Technology Moscow Region 141700 Deutsches Elektronen–Synchrotron 22607 Hamburg King Abdulaziz City for Science and Technology Riyadh 11442 Indian Institute of Technology Bhubaneswar Satya Nagar 751007 Indian Institute of Technology Madras Chennai 600036 University of Mississippi University Mississippi 38677 Indian Institute of Science Education and Research Mohali SAS Nagar 140306 Faculty of Mathematics and Physics Charles University 121 16 Prague J. Stefan Institute 1000 Ljubljana H. Niewodniczanski Institute of Nuclear Physics Krakow 31-342 University of Maribor 2000 Maribor University of Hawaii Honolulu Hawaii 96822 INFN—Sezione di Napoli 80126 Napoli Università di Napoli Federico II 80055 Napoli University of Bonn 53115 Bonn Department of Physics Fu Jen Catholic University Taipei 24205 Max-Planck-Institut für Physik 80805 München National Central University Chung-li 32054 Department of Physics and Institute of Natural Sciences Hanyang University Seoul 04763 P.N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991 Korea Institute of Science and Technology Information Daejeon 34141 Gyeongsang National University Jinju 52828 Sungkyunkwan

We present the results of the first Dalitz plot analysis of the decay D0→K−π+η. The analysis is performed on a data set corresponding to an integrated luminosity of 953 fb−1 collected by the Belle detector at the asymmetric-energy e+e− KEKB collider. The Dalitz plot is well described by a combination of the six resonant decay channels K¯*(892)0η, K−a0(980)+, K−a2(1320)+, K¯*(1410)0η, K*(1680)−π+ and K2*(1980)−π+, together with Kπ and Kη S-wave components. The decays K*(1680)−→K−η and K2*(1980)−→K−η are observed for the first time. We measure ratio of the branching fractions, B(D0→K−π+η)B(D0→K−π+)=0.500±0.002(stat)±0.020(syst)±0.003(BPDG). Using the Dalitz fit result, the ratio B(K*(1680)→Kη)B(K*(1680)→Kπ) is measured to be 0.11±0.02(stat)−0.04+0.06(syst)±0.04(BPDG); this is much lower than the theoretical expectations (≈1) made under the assumption that K*(1680) is a pure 13D1 state. The product branching fraction B(D0→[K2*(1980)−→K−η]π+)=(2.2−1.9+1.7)×10−4 is determined. In addition, the πη′ contribution to the a0(980)± resonance shape is confirmed with 10.1σ statistical significance using the three-channel Flatté model. We also measure B(D0→K¯*(892)0η)=(1.41−0.12+0.13)%. This is consistent with, and more precise than, the current world average (1.02±0.30)%, deviates with a significance of more than 3σ from the theoretical predictions of (0.51–0.92)%.

关键词： Branching fraction Hadronic decays Charmed mesons

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Search for a doubly charged DDK bound state in ϒ(1S, 2S) inclusive decays and via direct production in e+e− collisions at s=10.520, 10.580, and 10.867 GeV

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Physical Review D 2020年第11期102卷 112001-112001页

作者： Y. Li S. Jia C. P. Shen I. Adachi H. Aihara S. Al Said D. M. Asner T. Aushev R. Ayad V. Babu S. Bahinipati P. Behera K. Belous J. Bennett M. Bessner V. Bhardwaj B. Bhuyan T. Bilka J. Biswal G. Bonvicini A. Bozek M. Bračko T. E. Browder M. Campajola D. Červenkov M.-C. Chang P. Chang A. Chen B. G. Cheon K. Chilikin K. Cho S.-J. Cho S.-K. Choi Y. Choi S. Choudhury D. Cinabro S. Cunliffe S. Das N. Dash G. De Nardo F. Di Capua J. Dingfelder Z. Doležal T. V. Dong S. Eidelman D. Epifanov T. Ferber B. G. Fulsom R. Garg V. Gaur A. Garmash A. Giri P. Goldenzweig Y. Guan C. Hadjivasiliou O. Hartbrich K. Hayasaka H. Hayashii M. T. Hedges W.-S. Hou C.-L. Hsu K. Inami G. Inguglia A. Ishikawa R. Itoh M. Iwasaki Y. Iwasaki W. W. Jacobs H. B. Jeon Y. Jin C. W. Joo K. K. Joo A. B. Kaliyar K. H. Kang G. Karyan T. Kawasaki C. Kiesling D. Y. Kim K.-H. Kim S. H. Kim Y.-K. Kim K. Kinoshita P. Kodyš T. Konno S. Korpar D. Kotchetkov P. Križan R. Kroeger P. Krokovny T. Kuhr R. Kulasiri M. Kumar R. Kumar K. Kumara Y.-J. Kwon K. Lalwani J. S. Lange I. S. Lee S. C. Lee C. H. Li J. Li L. K. Li Y. B. Li L. Li Gioi J. Libby K. Lieret Z. Liptak C. MacQueen M. Masuda T. Matsuda D. Matvienko M. Merola K. Miyabayashi H. Miyata R. Mizuk G. B. Mohanty S. Mohanty T. Mori R. Mussa M. Nakao Z. Natkaniec A. Natochii L. Nayak M. Nayak M. Niiyama N. K. Nisar S. Nishida H. Ono Y. Onuki P. Oskin P. Pakhlov G. Pakhlova T. Pang S. Pardi H. Park S.-H. Park S. Patra S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen T. Podobnik V. Popov E. Prencipe M. T. Prim M. Ritter M. Röhrken A. Rostomyan N. Rout G. Russo D. Sahoo Y. Sakai S. Sandilya A. Sangal L. Santelj T. Sanuki V. Savinov G. Schnell J. Schueler C. Schwanda Y. Seino K. Senyo M. E. Sevior M. Shapkin C. Sharma J.-G. Shiu B. Shwartz A. Sokolov E. Solovieva M. Starič Z. S. Stottler M. Sumihama K. Sumisawa T. Sumiyoshi W. Sutcliffe M. Takizawa U. Tamponi K. Tanida F. Tenchini M. Uchida T. Uglov Y. Unno S. Uno S. E. Vahsen R. Van Tonder G. Varner A. Vinokurova V. Vorobyev C. H. Wang E. Wang M.-Z. Wang P. Wang M. Beihang University Beijing 100191 Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics Fudan University Shanghai 200443 High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 SOKENDAI (The Graduate University for Advanced Studies) Hayama 240-0193 Department of Physics University of Tokyo Tokyo 113-0033 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Brookhaven National Laboratory Upton New York 11973 Higher School of Economics (HSE) Moscow 101000 Deutsches Elektronen–Synchrotron 22607 Hamburg Indian Institute of Technology Bhubaneswar Satya Nagar 751007 Indian Institute of Technology Madras Chennai 600036 Institute for High Energy Physics Protvino 142281 University of Mississippi University Mississippi 38677 University of Hawaii Honolulu Hawaii 96822 Indian Institute of Science Education and Research Mohali SAS Nagar 140306 Indian Institute of Technology Guwahati Assam 781039 Faculty of Mathematics and Physics Charles University 121 16 Prague J. Stefan Institute 1000 Ljubljana Wayne State University Detroit Michigan 48202 H. Niewodniczanski Institute of Nuclear Physics Krakow 31-342 University of Maribor 2000 Maribor INFN - Sezione di Napoli 80126 Napoli Università di Napoli Federico II 80126 Napoli Department of Physics Fu Jen Catholic University Taipei 24205 Department of Physics National Taiwan University Taipei 10617 National Central University Chung-li 32054 Department of Physics and Institute of Natural Sciences Hanyang University Seoul 04763 P.N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991 Korea Institute of Science and Technology Information Daejeon 34141 Yonsei University Seoul 03722 Gyeongsang National University Jinju 52828 Sungkyunkwan University Suwon 16419 Indian Institute of Technology Hyderabad Telangana 502285 Malaviya National Institute of Technology Jaipu

We report the results of a first search for a doubly charged DDK bound state, denoted the R++, in ϒ(1S) and ϒ(2S) inclusive decays and via direct production in e+e− collisions at s=10.520, 10.580, and 10.867 GeV. The search uses data accumulated with the Belle detector at the KEKB asymmetric-energy e+e− collider. No significant signals are observed in the D+Ds*+ invariant-mass spectra of all studied modes. The 90% credibility level upper limits on their product branching fractions in ϒ(1S) and ϒ(2S) inclusive decays (B(ϒ(1S, 2S)→R+++anything)×B(R++→D+Ds*+)), the product values of Born cross section and branching fraction in e+e− collisions (σ(e+e−→R+++anything)×B(R++→D+Ds*+)) at s=10.520, 10.580, and 10.867 GeV under different assumptions of R++ masses varying from 4.13 to 4.17 GeV/c2 and widths varying from 0 to 5 MeV are obtained.

关键词： Bound states Branching fraction Hadronic decays Exotic baryons Lepton colliders Particle decays Particle production

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Transverse single spin asymmetries of forward neutrons in p+p, p+Al and p+Au collisions at √sNN = 200 GeV as a function of transverse and longitudinal momenta

arXiv

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arXiv 2021年

作者： Acharya, U.A. Aidala, C. Akiba, Y. Alfred, M. Andrieux, V. Apadula, N. Asano, H. Azmoun, B. Babintsev, V. Bandara, N.S. Barish, K.N. Bathe, S. Bazilevsky, A. Beaumier, M. Belmont, R. Berdnikov, A. Berdnikov, Y. Bichon, L. Blankenship, B. Blau, D.S. Bok, J.S. Borisov, V. Brooks, M.L. Bryslawskyj, J. Bumazhnov, V. Campbell, S. Roman, V. Canoa Cervantes, R. Chiu, M. Chi, C.Y. Choi, I.J. Choi, J.B. Citron, Z. Connors, M. Corliss, R. Cronin, N. Csörgo, T. Csanád, M. Danley, T.W. Daugherity, M.S. David, G. DeBlasio, K. Dehmelt, K. Denisov, A. Deshpande, A. Desmond, E.J. Dion, A. Dixit, D. Do, J.H. Drees, A. Drees, K.A. Durham, J.M. Durum, A. En'yo, H. Enokizono, A. Esha, R. Esumi, S. Fadem, B. Fan, W. Feege, N. Fields, D.E. Finger, M. Finger, M. Fitzgerald, D. Fokin, S.L. Frantz, J.E. Franz, A. Frawley, A.D. Fukuda, Y. Gallus, P. Gal, C. Garg, P. Ge, H. Giles, M. Giordano, F. Goto, Y. Grau, N. Greene, S.V. Perdekamp, M. Grosse Gunji, T. Guragain, H. Hachiya, T. Haggerty, J.S. Hahn, K.I. Hamagaki, H. Hamilton, H.F. Hanks, J. Han, S.Y. Harvey, M. Hasegawa, S. Haseler, T.O.S. Hemmick, T.K. He, X. Hill, J.C. Hill, K. Hodges, A. Hollis, R.S. Homma, K. Hong, B. Hoshino, T. Hotvedt, N. Huang, J. Imai, K. Inaba, M. Iordanova, A. Isenhower, D. Ivanishchev, D. Jacak, B.V. Jezghani, M. Jiang, X. Ji, Z. Johnson, B.M. Jouan, D. Jumper, D.S. Kang, J.H. Kapukchyan, D. Karthas, S. Kawall, D. Kazantsev, A.V. Khachatryan, V. Khanzadeev, A. Khatiwada, A. Kim, C. Kim, E.-J. Kim, M. Kincses, D. Kingan, A. Kistenev, E. Klatsky, J. Kline, P. Koblesky, T. Kotov, D. Kovacs, L. Kudo, S. Kurita, K. Kwon, Y. Lajoie, J.G. Larionova, D. Lebedev, A. Lee, S. Lee, S.H. Leitch, M.J. Leung, Y.H. Lewis, N.A. Lim, S.H. Liu, M.X. Li, X. Loggins, V.-R. Loomis, D.A. Lovasz, K. Lynch, D. Lökös, S. Majoros, T. Makdisi, Y.I. Makek, M. Manko, V.I. Mannel, E. McCumber, M. McGaughey, P.L. McGlinchey, D. Abilene Christian University AbileneTX79699 United States Department of Physics Augustana University Sioux FallsSD57197 United States Department of Physics Banaras Hindu University Varanasi221005 India Bhabha Atomic Research Centre Bombay400 085 India Baruch College City University of New York New YorkNY10010 United States Collider-Accelerator Department Brookhaven National Laboratory UptonNY11973-5000 United States Physics Department Brookhaven National Laboratory UptonNY11973-5000 United States University of California-Riverside RiversideCA92521 United States Charles University Ovocný trh 5 Praha 1 Prague116 36 Czech Republic Center for Nuclear Study Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan University of Colorado Boulder CO80309 United States Columbia University New YorkNY10027 United States Nevis Laboratories IrvingtonNY10533 United States Czech Technical University Zikova 4 Prague 6166 36 Czech Republic Debrecen University Egyetem tér 1 DebrecenH-4010 Hungary ELTE Eötvös Loránd University Pázmány P. s. 1/A BudapestH-1117 Hungary Eszterházy Károly University Károly Róbert Campus Mátrai út 36 GyöngyösH-3200 Hungary Ewha Womans University Seoul120-750 Korea Republic of Florida A&M University TallahasseeFL32307 United States Florida State University TallahasseeFL32306 United States Georgia State University AtlantaGA30303 United States Hiroshima University Kagamiyama Higashi-Hiroshima739-8526 Japan Department of Physics and Astronomy Howard University WashingtonDC20059 United States IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino142281 Russia University of Illinois at Urbana-Champaign UrbanaIL61801 United States Institute for Nuclear Research of the Russian Academy of Sciences prospekt 60-letiya Oktyabrya 7a Moscow117312 Russia Institute of Physics Academy of Sciences of the Czech Republic Na Slovance 2

In 2015 the PHENIX collaboration at the Relativistic Heavy Ion Collider recorded p+p, p+Al, and p+Au collision data at center of mass energies of √sNN = 200 GeV with the proton beam(s) transversely polarized. At very forward rapidities η > 6.8 relative to the polarized proton beam, neutrons were detected either inclusively or in (anti)correlation with detector activity related to hard collisions. The resulting single spin asymmetries, that were previously reported, have now been extracted as a function of the transverse momentum of the neutron as well as its longitudinal momentum fraction xF. The explicit kinematic dependence, combined with the correlation information allows for a closer look at the interplay of different mechanisms suggested to describe these asymmetries, such as hadronic interactions or electromagnetic interactions in ultra-peripheral collisions, UPC. Events that are correlated with a hard collision indeed display a mostly negative asymmetry that increases in magnitude as a function of transverse momentum with only little dependence on xF. In contrast, events that are not likely to have emerged from a hard collision display positive asymmetries for the nuclear collisions with a kinematic dependence that resembles that of a UPC based model. Because the UPC interaction depends strongly on the charge of the nucleus, those effects are very small for p+p collisions, moderate for p+Al collisions, and large for p+Au collisions. © 2021, CC BY.

关键词： Colliding beam accelerators

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Causes of blindness and vision impairment in 2020 and trends over 30 years, and prevalence of avoidable blindness in relation to VISION 2020: the Right to Sight: an analysis for the Global Burden of Disease Study (vol 2, pg 144, 2021)

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LANCET GLOBAL HEALTH 2021年第4期9卷 E408-E408页

作者： Steinmetz, Jaimie D. Vision and Eye Research Institute Anglia Ruskin University Cambridge United Kingdom Biomedical Informatics Seoul National University Hospital Seoul South Korea Institute for Health Metrics and Evaluation University of Washington Seattle WA United States Department of Health Metrics Sciences School of Medicine University of Washington Seattle WA United States Institute of Health Services Research Yonsei University Seoul South Korea Department of Ophthalmology University of Washington Seattle WA United States Department of Mathematics Imperial College London London United Kingdom WHO Collaborating Centre for Public Health Education and Training Imperial College London London United Kingdom Department of Primary Care and Public Health Imperial College London London United Kingdom School of Population and Global Health University of Melbourne Carlton VIC Australia School of Optometry and Vision Science UNSW Sydney NSW Australia Brien Holden Vision Institute Sydney Australia Department of Ophthalmology University of Adelaide Adelaide SA Australia Department of Parasitology and Mycology Jahrom University of Medical Sciences Jahrom Iran Department of Clinical Sciences University of Sharjah Sharjah United Arab Emirates Ophthalmic Research Center Shahid Beheshti University of Medical Sciences Tehran Iran Department of Ophthalmology Shahid Beheshti University of Medical Sciences Tehran Iran Research Institute for Endocrine Sciences Shahid Beheshti University of Medical Sciences Tehran Iran Ophthalmic Epidemiology Research Center Shahid Beheshti University of Medical Sciences Tehran Iran Health Services Management Department Qazvin University of Medical Sciences Qazvin Iran Department of Systems Populations and Leadership University of Michigan Ann Arbor MI United States Department of Medicine Sofia Ismail Memorial Medical Centre Bogura Bangladesh The Fred Hollows Foundation Sydney NSW Australia Berhan Public Health & Eye Care Consultancy Addis A

Hospital El Salvador: a novel paradigm of intensive care in response to COVID-19 in central America. Lancet Glob Health 2021;9: e241?42?In this Comment, the conflict of interest statement should have included the following: ?By virtue of their roles within a public hospital or the Ministry of Health, MB, LC, WH, and XS are government employees. The findings and conclusions in the Comment are only those of the authors.? This correction has been made as of Feb 26, 2021.

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Study of electromagnetic decays of orbitally excited Ξc baryons

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Physical Review D 2020年第7期102卷 071103(R)-071103(R)页

作者： J. Yelton I. Adachi J. K. Ahn H. Aihara S. Al Said D. M. Asner T. Aushev R. Ayad V. Babu S. Bahinipati P. Behera C. Beleño J. Bennett V. Bhardwaj B. Bhuyan T. Bilka J. Biswal G. Bonvicini A. Bozek M. Bračko T. E. Browder M. Campajola D. Červenkov M.-C. Chang P. Chang V. Chekelian A. Chen B. G. Cheon K. Chilikin K. Cho S.-J. Cho S.-K. Choi Y. Choi S. Choudhury D. Cinabro S. Cunliffe G. De Nardo F. Di Capua Z. Doležal T. V. Dong S. Eidelman D. Epifanov T. Ferber B. G. Fulsom R. Garg V. Gaur N. Gabyshev A. Garmash A. Giri P. Goldenzweig C. Hadjivasiliou O. Hartbrich K. Hayasaka H. Hayashii M. T. Hedges M. Hernandez Villanueva W.-S. Hou C.-L. Hsu T. Iijima K. Inami G. Inguglia A. Ishikawa R. Itoh M. Iwasaki Y. Iwasaki W. W. Jacobs S. Jia Y. Jin C. W. Joo K. K. Joo A. B. Kaliyar K. H. Kang G. Karyan Y. Kato T. Kawasaki H. Kichimi C. Kiesling B. H. Kim D. Y. Kim S. H. Kim Y.-K. Kim K. Kinoshita P. Kodyš S. Korpar D. Kotchetkov P. Križan R. Kroeger P. Krokovny R. Kulasiri R. Kumar K. Kumara A. Kuzmin Y.-J. Kwon K. Lalwani J. S. Lange S. C. Lee P. Lewis L. K. Li Y. B. Li L. Li Gioi J. Libby K. Lieret Z. Liptak D. Liventsev T. Luo C. MacQueen M. Masuda T. Matsuda D. Matvienko J. T. McNeil M. Merola K. Miyabayashi H. Miyata R. Mizuk G. B. Mohanty S. Mohanty T. J. Moon T. Mori M. Mrvar R. Mussa E. Nakano M. Nakao Z. Natkaniec A. Natochii M. Nayak N. K. Nisar S. Nishida K. Ogawa S. Ogawa H. Ono Y. Onuki P. Oskin P. Pakhlov G. Pakhlova S. Pardi H. Park S.-H. Park S. Patra S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen T. Podobnik V. Popov E. Prencipe M. T. Prim M. Ritter A. Rostomyan N. Rout G. Russo D. Sahoo Y. Sakai S. Sandilya L. Santelj T. Sanuki V. Savinov G. Schnell J. Schueler C. Schwanda Y. Seino K. Senyo M. E. Sevior M. Shapkin V. Shebalin C. P. Shen J.-G. Shiu B. Shwartz J. B. Singh A. Sokolov E. Solovieva M. Starič Z. S. Stottler J. F. Strube M. Sumihama K. Sumisawa T. Sumiyoshi W. Sutcliffe M. Takizawa U. Tamponi K. Tanida F. Tenchini M. Uchida T. Uglov Y. Unno S. Uno P. Urquijo Y. Usov S. E. Vahsen R. Van Tonde University of Florida Gainesville Florida 32611 High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 SOKENDAI (The Graduate University for Advanced Studies) Hayama 240-0193 Korea University Seoul 02841 Department of Physics University of Tokyo Tokyo 113-0033 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Brookhaven National Laboratory Upton New York 11973 Higher School of Economics (HSE) Moscow 101000 Deutsches Elektronen–Synchrotron 22607 Hamburg Indian Institute of Technology Bhubaneswar Satya Nagar 751007 Indian Institute of Technology Madras Chennai 600036 II. Physikalisches Institut Georg-August-Universität Göttingen 37073 Göttingen University of Mississippi University Mississippi 38677 Indian Institute of Science Education and Research Mohali SAS Nagar 140306 Indian Institute of Technology Guwahati Assam 781039 Faculty of Mathematics and Physics Charles University 121 16 Prague J. Stefan Institute 1000 Ljubljana Wayne State University Detroit Michigan 48202 H. Niewodniczanski Institute of Nuclear Physics Krakow 31-342 University of Maribor 2000 Maribor University of Hawaii Honolulu Hawaii 96822 INFN—Sezione di Napoli 80126 Napoli Università di Napoli Federico II 80126 Napoli Department of Physics Fu Jen Catholic University Taipei 24205 Department of Physics National Taiwan University Taipei 10617 Max-Planck-Institut für Physik 80805 München National Central University Chung-li 32054 Department of Physics and Institute of Natural Sciences Hanyang University Seoul 04763 P.N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991 Korea Institute of Science and Technology Information Daejeon 34141 Yonsei University Seoul 03722 Gyeongsang National University Jinju 52828 Sungkyunkwan University Suwon 16419 Indian Institute of Technology Hyderabad Telangana 502285 Key Laboratory of Nuclear Physics and Ion-beam Application (

Using 980 fb−1 of data collected with the Belle detector operating at the KEKB asymmetric-energy e+e− collider, we report a study of the electromagnetic decays of excited charmed baryons Ξc(2790) and Ξc(2815). A clear signal (8.6 standard deviations) is observed for Ξc(2815)0→Ξc0γ, and we measure: B[Ξc(2815)0 → Ξc0γ]B[Ξc(2815)0 → Ξc(2645)+π− → Ξc0π+π−]=0.41±0.05±0.03. We also present evidence (3.8 standard deviations) for the similar decay of the Ξc(2790)0 and measure: B[Ξc(2790)0 → Ξc0γ]B[Ξc(2790)0 → Ξc′+π− → Ξc+γπ−]=0.13±0.03±0.02. The first quoted uncertainties are statistical and the second systematic. We find no hint of the analogous decays of the Ξc(2815)+ and Ξc(2790)+ baryons and set upper limits at the 90% confidence level of: B[Ξc(2815)+ → Ξc+γ]B[Ξc(2815)+ → Ξc(2645)0π+ → Ξc+π−π+]<0.09, and B[Ξc(2790)+ → Ξc+γ]B[Ξc(2790)+ → Ξc′0π+ → Ξc0γπ+]<0.06. Approximate values of the partial widths of the decays are extracted, which can be used to discriminate between models of the underlying quark structure of these excited states.

关键词： Leptonic, semileptonic & radiative decays Particle phenomena

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Characterising acute and chronic care needs: insights from the Global Burden of Disease Study 2019

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Nature communications 2025年第1期16卷 4235-4235页

作者： Cecilia Anza-Ramirez J. Jaime Miranda Benedetta Armocida Jorge César Correia Harriette Gillian Christine Van Spall David Beran Amirali Aali Kalkidan Hassen Abate Semagn Mekonnen Abate Cristiana Abbafati Mohsen Abbasi-Kangevari Zeinab Abbasi-Kangevari Zahra Aryan Sina Azadnajafabad Mohammadreza Azangou-Khyavy Seyyed-Hadi Ghamari Mohammad Keykhaei Javad Khanali Sara Momtazmanesh Fateme Montazeri Shayan Rahmani Mohammad-Mahdi Rashidi Nazila Rezaei Negar Rezaei Sahar Saeedi Moghaddam Hossein Hassanian-Moghaddam Ali-Asghar Kolahi Ali Nikoobar Hedayat Abbastabar Ahmed M. Abdel-Azeem Michael Abdelmasseh Juan Sanabria Sherief Abd-Elsalam Ahmed Abdelwahab Gholamreza Abdoli Mohammad Abdollahi Meriem Abdoun Deldar Morad Abdulah Abu Yousuf Md Abdullah Ame Mehadi Abdurehman Getachew Abebe Aidin Abedi Chirag P. Doshi Vida Abedi Hassan Abidi Richard Gyan Aboagye Hassan Abolhassani Nima Rezaei Lucas Guimarães Abreu Michael R. M. Abrigo Yonas Derso Abtew Hiwa Abubaker Ali Eman Abu-Gharbieh Hiba Jawdat Barqawi Rabih Halwani Maha Mohamed Saber-Ayad Iman M. Talaat Ahmed Abu-Zaid Manfred Mario Kokou Accrombessi Juan Manuel Acuna Denberu Eshetie Adane Tigist Demssew Adane Isaac Yeboah Addo Giovanni Addolorato Oluwafemi Atanda Adeagbo Victor Adekanmbi Miracle Ayomikun Adesina Isaac Iyinoluwa Olufadewa Olatunji O. Adetokunboh Daniel Adedayo Adeyinka Qorinah Estiningtyas Sakilah Adnani Aanuoluwapo Adeyimika Afolabi Olayinka Stephen Ilesanmi Muhammad Sohail Afzal Saira Afzal Gina Agarwal Prerna Agarwal Pradyumna Agasthi Anurag Agrawal Marcela Agudelo-Botero Adolfo Martinez-Valle Bright Opoku Ahinkorah Aqeel Ahmad Sajjad Ahmad Sohail Ahmad Tauseef Ahmad Ali Ahmadi Siamak Sabour Keivan Ahmadi Sanjay Basu Sepideh Ahmadi Ali Ahmed Shaun Wen Huey Lee Ayman Ahmed Haroon Ahmed Jivan Qasim Ahmed Gahin Abdulraheem Tayib Yahya Yahya Luai A. Ahmed Iffat Elbarazi Syed Mahboob Shah Janardhana P. Aithala Marjan Ajami Budi Aji Hossein Akbarialiabad Yibeltal Akelew Meisam Akhlaghdoust Elham Jamshidi Addis Aklilu Azene Tesfaye Melat Woldemariam Maxwell Ak CRONICAS Center of Excellence in Chronic Diseases Universidad Peruana Cayetano Heredia Lima Peru School of Medicine Universidad Peruana Cayetano Heredia Lima Peru Sydney School of Public Health Faculty of Medicine and Health University of Sydney Sydney NSW Australia Faculty of Epidemiology and Population Health London School of Hygiene & Tropical Medicine London UK Division of Tropical and Humanitarian Medicine University of Geneva Geneva Switzerland Department of Cardiovascular Endocrine-metabolic Diseases and Aging Istituto Superiore di Sanità Rome Italy Division of Endocrinology Diabetology Nutrition and Therapeutic Patient Education Department of Medicine Geneva University Hospitals Geneva Switzerland Department of Medicine and Department of Health Research Evidence and Impact McMaster University Hamilton ON Canada Research Institute of St. Joe’s Hamilton ON Canada Population Health Research Institute Hamilton Canada Geneva University Hospitals Geneva Switzerland Faculty of Medicine Mashhad University of Medical Sciences Mashhad Iran Department of Nutrition and Dietetics Jimma University Jimma Ethiopia Anesthesiology Department Dilla University Addis Ababa Ethiopia Department of Juridical and Economic Studies La Sapienza University Rome Italy Non-Communicable Diseases Research Center Tehran University of Medical Sciences Tehran Iran Social Determinants of Health Research Center Shahid Beheshti University of Medical Sciences Tehran Iran Brigham and Women’s Hospital Harvard University Boston MA USA Students’ Scientific Research Center (SSRC) Tehran University of Medical Sciences Tehran Iran School of Medicine Tehran University of Medical Sciences Tehran Iran School of Medicine Shahid Beheshti University of Medical Sciences Tehran Iran Endocrinology and Metabolism Research Institute Tehran University of Medical Sciences Tehran Iran Chapter of Addiction Medicine University of Sydney Sydney NSW Australia Advanced Diagnostic and Intervent

Chronic care manages long-term, progressive conditions, while acute care addresses short-term conditions. Chronic conditions increasingly strain health systems, which are often unprepared for these demands. This study examines the burden of conditions requiring acute versus chronic care, including sequelae. Conditions and sequelae from the Global Burden of Diseases Study 2019 were classified into acute or chronic care categories. Data were analysed by age, sex, and socio-demographic index, presenting total numbers and contributions to burden metrics such as Disability-Adjusted Life Years (DALYs), Years Lived with Disability (YLD), and Years of Life Lost (YLL). Approximately 68% of DALYs were attributed to chronic care, while 27% were due to acute care. Chronic care needs increased with age, representing 86% of YLDs and 71% of YLLs, and accounting for 93% of YLDs from sequelae. These findings highlight that chronic care needs far exceed acute care needs globally, necessitating health systems to adapt accordingly. © 2025. The Author(s).

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Kinematic dependence of azimuthal anisotropies in p+Au, d+Au, 3He+Au at √sNN = 200 GeV

arXiv

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arXiv 2021年

作者： Acharya, U.A. Adare, A. Aidala, C. Ajitanand, N.N. Akiba, Y. Alfred, M. Andrieux, V. Aoki, K. Apadula, N. Asano, H. Ayuso, C. Azmoun, B. Babintsev, V. Bai, M. Bandara, N.S. Bannier, B. Barish, K.N. Bathe, S. Bazilevsky, A. Beaumier, M. Beckman, S. Belmont, R. Berdnikov, A. Berdnikov, Y. Bichon, L. Blankenship, B. Blau, D.S. Boer, M. Bok, J.S. Borisov, V. Boyle, K. Brooks, M.L. Bryslawskyj, J. Bumazhnov, V. Butler, C. Campbell, S. Canoa Roman, V. Cervantes, R. Chen, C.-H. Chiu, M. Chi, C.Y. Choi, I.J. Choi, J.B. Chujo, T. Citron, Z. Connors, M. Corliss, R. Cronin, N. Csörgő, T. Csanád, M. Liu, L.D. Danley, T.W. Datta, A. Daugherity, M.S. David, G. DeBlasio, K. Dehmelt, K. Denisov, A. Deshpande, A. Desmond, E.J. Dion, A. Diss, P.B. Dixit, D. Do, J.H. Drees, A. Drees, K.A. Dumancic, M. Durham, J.M. Durum, A. Elder, T. En'yo, H. Enokizono, A. Esha, R. Esumi, S. Fadem, B. Fan, W. Feege, N. Fields, D.E. Finger, M. Finger, M. Fitzgerald, D. Fokin, S.L. Frantz, J.E. Franz, A. Frawley, A.D. Fukuda, Y. Gallus, P. Gal, C. Garg, P. Ge, H. Giles, M. Giordano, F. Glenn, A. Goto, Y. Grau, N. Greene, S.V. Grosse Perdekamp, M. Gunji, T. Guragain, H. Hachiya, T. Haggerty, J.S. Hahn, K.I. Hamagaki, H. Hamilton, H.F. Hanks, J. Han, S.Y. Harvey, M. Hasegawa, S. Haseler, T.O.S. Hashimoto, K. Hemmick, T.K. He, X. Hill, J.C. Hill, K. Hodges, A. Hollis, R.S. Homma, K. Hong, B. Hoshino, T. Hotvedt, N. Huang, J. Imai, K. Imrek, J. Inaba, M. Iordanova, A. Isenhower, D. Ito, Y. Ivanishchev, D. Jacak, B.V. Jezghani, M. Jiang, X. Ji, Z. Johnson, Brant M. Jorjadze, V. Jouan, D. Jumper, D.S. Kanda, S. Kang, J.H. Kapukchyan, D. Karthas, S. Kawall, D. Kazantsev, A.V. Key, J.A. Khachatryan, V. Khanzadeev, A. Khatiwada, A. Kimelman, B. Kim, C. Kim, D.J. Kim, E.-J. Kim, G.W. Kim, M. Kim, M.H. Kincses, D. Kingan, A. Kistenev, E. Kitamura, R. Klatsky, J. Kleinjan, D. Kline, P. Koblesky, T. Abilene Christian University AbileneTX79699 United States Department of Physics Augustana University Sioux FallsSD57197 United States Department of Physics Banaras Hindu University Varanasi221005 India Bhabha Atomic Research Centre Bombay400 085 India Baruch College City University of New York New YorkNY10010 United States Collider-Accelerator Department Brookhaven National Laboratory UptonNY11973-5000 United States Physics Department Brookhaven National Laboratory UptonNY11973-5000 United States University of California-Riverside RiversideCA92521 United States Charles University Ovocný trh 5 Praha 1 Prague116 36 Czech Republic Science and Technology on Nuclear Data Laboratory China Institute of Atomic Energy Beijing102413 China Center for Nuclear Study Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan University of Colorado Boulder CO80309 United States Columbia University New YorkNY10027 United States Nevis Laboratories IrvingtonNY10533 United States Czech Technical University Zikova 4 Prague 6166 36 Czech Republic Debrecen University Egyetem tér 1 DebrecenH-4010 Hungary ELTE Eötvös Loránd University Pázmány P. s. 1/A BudapestH-1117 Hungary Eszterházy Károly University Károly Róbert Campus Gyöngyös Mátrai út 36 H-3200 Hungary Ewha Womans University Seoul120-750 Korea Republic of Florida A&M University TallahasseeFL32307 United States Florida State University TallahasseeFL32306 United States Georgia State University AtlantaGA30303 United States Hiroshima University Kagamiyama Higashi Hiroshima739-8526 Japan Department of Physics and Astronomy Howard University WashingtonDC20059 United States IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino142281 Russia University of Illinois at Urbana-Champaign UrbanaIL61801 United States Institute for Nuclear Research The Russian Academy of Sciences prospekt 60-letiya Oktyabr

There is strong evidence for the formation of small droplets of quark-gluon plasma in p/d/3He+Au collisions at the Relativistic Heavy Ion Collider (RHIC) and in p+p/Pb collisions at the Large Hadron Collider. In particular, the analysis of data at RHIC for different geometries obtained by varying the projectile size and shape has proven insightful. In the present analysis, we find excellent agreement with the previously published PHENIX at RHIC results on elliptical and triangular flow with an independent analysis via the two-particle correlation method, which has quite different systematic uncertainties and an independent code base. In addition, the results are extended to other detector combinations with different kinematic (pseudorapidity) coverage. These results provide additional constraints on contributions from nonflow and longitudinal decorrelations. © 2021, CC BY.

关键词： Colliding beam accelerators

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Search for B+→μ+νμ and B+→μ+N with inclusive tagging

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Physical Review D 2020年第3期101卷 032007-032007页

作者： M. T. Prim F. U. Bernlochner P. Goldenzweig M. Heck I. Adachi K. Adamczyk H. Aihara S. Al Said D. M. Asner H. Atmacan V. Aulchenko T. Aushev R. Ayad V. Babu A. M. Bakich V. Bansal P. Behera C. Beleño V. Bhardwaj B. Bhuyan T. Bilka J. Biswal A. Bobrov A. Bozek M. Bračko N. Braun T. E. Browder M. Campajola L. Cao D. Červenkov P. Chang V. Chekelian A. Chen B. G. Cheon K. Chilikin H. E. Cho K. Cho Y. Choi S. Choudhury D. Cinabro S. Cunliffe Z. Doležal S. Eidelman D. Epifanov J. E. Fast T. Ferber B. G. Fulsom R. Garg V. Gaur A. Garmash A. Giri O. Grzymkowska Y. Guan J. Haba T. Hara K. Hayasaka H. Hayashii W.-S. Hou T. Iijima K. Inami G. Inguglia A. Ishikawa M. Iwasaki Y. Iwasaki S. Jia Y. Jin D. Joffe K. K. Joo A. B. Kaliyar G. Karyan T. Kawasaki H. Kichimi C. Kiesling C. H. Kim D. Y. Kim K. T. Kim S. H. Kim K. Kinoshita P. Kodyš S. Korpar D. Kotchetkov P. Križan R. Kroeger P. Krokovny T. Kuhr R. Kulasiri R. Kumar T. Kumita A. Kuzmin Y.-J. Kwon K. Lalwani J. S. Lange I. S. Lee J. K. Lee J. Y. Lee S. C. Lee P. Lewis C. H. Li L. Li Gioi J. Libby K. Lieret D. Liventsev P.-C. Lu T. Luo J. MacNaughton M. Masuda T. Matsuda D. Matvienko M. Merola F. Metzner K. Miyabayashi R. Mizuk G. B. Mohanty R. Mussa M. Nakao G. De Nardo K. J. Nath Z. Natkaniec M. Nayak M. Niiyama N. K. Nisar S. Nishida K. Nishimura S. Ogawa H. Ono Y. Onuki P. Pakhlov G. Pakhlova B. Pal S. Pardi H. Park S.-H. Park S. Patra S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen V. Popov E. Prencipe M. Ritter A. Rostomyan M. Rozanska G. Russo D. Sahoo Y. Sakai L. Santelj V. Savinov O. Schneider G. Schnell J. Schueler C. Schwanda Y. Seino K. Senyo M. E. Sevior V. Shebalin J.-G. Shiu B. Shwartz F. Simon A. Sokolov E. Solovieva M. Starič J. F. Strube M. Sumihama T. Sumiyoshi W. Sutcliffe M. Takizawa U. Tamponi Y. Tao F. Tenchini K. Trabelsi M. Uchida T. Uglov Y. Unno S. Uno Y. Ushiroda Y. Usov S. E. Vahsen R. Van Tonder G. Varner K. E. Varvell A. Vinokurova B. Wang C. H. Wang M.-Z. Wang P. Wang S. Watanuki E. Won S. B. Yang H. Ye J. H. Yin Y. Yusa Z. P. Zhang V. Zhi Institut für Experimentelle Teilchenphysik Karlsruher Institut für Technologie 76131 Karlsruhe University of Bonn 53115 Bonn High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 SOKENDAI (The Graduate University for Advanced Studies) Hayama 240-0193 H. Niewodniczanski Institute of Nuclear Physics Krakow 31-342 Department of Physics University of Tokyo Tokyo 113-0033 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Brookhaven National Laboratory Upton New York 11973 University of South Carolina Columbia South Carolina 29208 Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Novosibirsk State University Novosibirsk 630090 Moscow Institute of Physics and Technology Moscow Region 141700 Deutsches Elektronen–Synchrotron 22607 Hamburg School of Physics University of Sydney New South Wales 2006 Pacific Northwest National Laboratory Richland Washington 99352 Indian Institute of Technology Madras Chennai 600036 II. Physikalisches Institut Georg-August-Universität Göttingen 37073 Göttingen Indian Institute of Science Education and Research Mohali SAS Nagar 140306 Indian Institute of Technology Guwahati Assam 781039 Faculty of Mathematics and Physics Charles University 121 16 Prague J. Stefan Institute 1000 Ljubljana University of Maribor 2000 Maribor University of Hawaii Honolulu Hawaii 96822 INFN—Sezione di Napoli 80126 Napoli Università di Napoli Federico II 80055 Napoli Department of Physics National Taiwan University Taipei 10617 Max-Planck-Institut für Physik 80805 München National Central University Chung-li 32054 Hanyang University Seoul 133-791 P.N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991 Korea Institute of Science and Technology Information Daejeon 305-806 Sungkyunkwan University Suwon 440-746 Indian Institute of Technology Hyderabad Telangana 502285 Wayne State University Detroit Michigan 48202 Panj

We report the result for a search for the leptonic decay of B+→μ+νμ using the full Belle dataset of 711 fb−1 of integrated luminosity at the ϒ(4S) resonance. In the Standard Model leptonic B-meson decays are helicity and Cabibbo-Kobayashi-Maskawa suppressed. To maximize sensitivity an inclusive tagging approach is used to reconstruct the second B meson produced in the collision. The directional information from this second B meson is used to boost the observed μ into the signal B-meson rest frame, in which the μ has a monochromatic momentum spectrum. Though its momentum is smeared by the experimental resolution, this technique improves the analysis sensitivity considerably. Analyzing the μ momentum spectrum in this frame we find B(B+→μ+νμ)=(5.3±2.0±0.9)×10−7 with a one-sided significance of 2.8 standard deviations over the background-only hypothesis. This translates to a frequentist upper limit of B(B+→μ+νμ)<8.6×10−7 at 90% confidence level. The experimental spectrum is then used to search for a massive sterile neutrino, B+→μ+N, but no evidence is observed for a sterile neutrino with a mass in a range of 0–1.5 GeV. The determined B+→μ+νμ branching fraction limit is further used to constrain the mass and coupling space of the type II and type III two-Higgs-doublet models.

关键词： Determination of fundamental constants Electroweak interaction Extensions of Higgs sector Lattice QCD Leptonic, semileptonic & radiative decays Quark mixing Heavy neutrinos Leptons Mesons

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