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Search for B0→π−τ+ντ with hadronic tagging at Belle

Physical Review D 2016年第3期93卷 032007-032007页

作者： P. Hamer A. Frey A. Abdesselam I. Adachi H. Aihara S. Al Said K. Arinstein D. M. Asner T. Aushev R. Ayad V. Babu I. Badhrees A. M. Bakich E. Barberio B. Bhuyan J. Biswal A. Bozek M. Bračko T. E. Browder D. Červenkov V. Chekelian A. Chen B. G. Cheon K. Chilikin K. Cho V. Chobanova Y. Choi D. Cinabro J. Dalseno M. Danilov I. Danko N. Dash J. Dingfelder Z. Doležal Z. Drásal A. Drutskoy D. Dutta S. Eidelman H. Farhat J. E. Fast T. Ferber B. G. Fulsom V. Gaur N. Gabyshev A. Garmash D. Getzkow R. Gillard R. Glattauer Y. M. Goh P. Goldenzweig B. Golob D. Greenwald J. Haba T. Hara J. Hasenbusch K. Hayasaka H. Hayashii W.-S. Hou T. Iijima K. Inami G. Inguglia A. Ishikawa R. Itoh Y. Iwasaki I. Jaegle H. B. Jeon D. Joffe K. K. Joo T. Julius K. H. Kang E. Kato T. Kawasaki C. Kiesling D. Y. Kim J. B. Kim J. H. Kim K. T. Kim M. J. Kim S. H. Kim Y. J. Kim K. Kinoshita P. Kodyš S. Korpar P. Križan P. Krokovny T. Kuhr A. Kuzmin Y.-J. Kwon J. S. Lange D. H. Lee I. S. Lee H. Li L. Li Y. Li J. Libby Y. Liu D. Liventsev P. Lukin M. Masuda D. Matvienko K. Miyabayashi H. Miyake H. Miyata R. Mizuk G. B. Mohanty S. Mohanty A. Moll H. K. Moon R. Mussa E. Nakano M. Nakao T. Nanut Z. Natkaniec M. Nayak N. K. Nisar S. Nishida S. Ogawa S. Okuno C. Oswald P. Pakhlov G. Pakhlova B. Pal H. Park T. K. Pedlar L. Pesántez R. Pestotnik M. Petrič L. E. Piilonen C. Pulvermacher J. Rauch E. Ribežl M. Ritter A. Rostomyan H. Sahoo Y. Sakai S. Sandilya L. Santelj T. Sanuki V. Savinov O. Schneider G. Schnell C. Schwanda Y. Seino K. Senyo M. Shapkin V. Shebalin T.-A. Shibata J.-G. Shiu A. Sibidanov F. Simon Y.-S. Sohn A. Sokolov E. Solovieva M. Starič J. Stypula T. Sumiyoshi Y. Teramoto K. Trabelsi V. Trusov M. Uchida S. Uehara Y. Unno S. Uno P. Urquijo Y. Usov C. Van Hulse P. Vanhoefer G. Varner V. Vorobyev A. Vossen C. H. Wang M.-Z. Wang P. Wang Y. Watanabe E. Won H. Yamamoto J. Yamaoka S. Yashchenko Y. Yook Z. P. Zhang V. Zhilich V. Zhulanov A. Zupanc II. Physikalisches Institut Georg-August-Universität Göttingen 37073 Göttingen Department of Physics Faculty of Science University of Tabuk Tabuk 71451 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 King Abdulaziz University Jeddah 21589 Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Novosibirsk State University Novosibirsk 630090 Pacific Northwest National Laboratory Richland Washington 99352 Moscow Institute of Physics and Technology Moscow Region 141700 Tata Institute of Fundamental Research Mumbai 400005 King Abdulaziz City for Science and Technology Riyadh 11442 School of Physics University of Sydney NSW 2006 School of Physics University of Melbourne Victoria 3010 Indian Institute of Technology Guwahati Assam 781039 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 Faculty of Mathematics and Physics Charles University 121 16 Prague Max-Planck-Institut für Physik 80805 München National Central University Chung-li 32054 Hanyang University Seoul 133-791 Moscow Physical Engineering Institute Moscow 115409 Korea Institute of Science and Technology Information Daejeon 305-806 Sungkyunkwan University Suwon 440-746 Wayne State University Detroit Michigan 48202 Excellence Cluster Universe Technische Universität München 85748 Garching University of Pittsburgh Pittsburgh Pennsylvania 15260 Indian Institute of Technology Bhubaneswar Satya Nagar 751007 University of Bonn 53115 Bonn Deutsches Elektronen–Synchrotron 22607 Hamburg Justus-Liebig-Universität Gießen 35392 Gießen Institute of High Energy Physics Vienna 1050 Institut für Experimentelle Kernphysik Karlsruher Institut für Technologie 76131 Karlsruhe Faculty of Mathematics and Physics Univ

We search for the process B0→π−τ+ντ using the full Belle data set of 711 fb−1, corresponding to 772×106BB¯ pairs, collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We reconstruct one B meson in a hadronic decay and search for the B0→π−τ+ντ process in the remainder of the event. No significant signal is observed and an upper limit of B(B0→π−τ+ντ)<2.5×10−4 is obtained at the 90% confidence level.

关键词： Leptonic, semileptonic & radiative decays Rare decays Bottom mesons Lepton colliders

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Inclusive and exclusive measurements of B decays to χc1 and χc2 at Belle

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Physical Review D 2016年第5期93卷 052016-052016页

作者： V. Bhardwaj K. Miyabayashi E. Panzenböck K. Trabelsi A. Frey A. Abdesselam I. Adachi H. Aihara S. Al Said K. Arinstein D. M. Asner H. Atmacan V. Aulchenko T. Aushev R. Ayad V. Babu I. Badhrees S. Bahinipati A. M. Bakich A. Bala V. Bansal E. Barberio B. Bhuyan J. Biswal A. Bobrov A. Bondar A. Bozek M. Bračko T. E. Browder D. Červenkov V. Chekelian A. Chen B. G. Cheon K. Chilikin R. Chistov K. Cho V. Chobanova S.-K. Choi Y. Choi D. Cinabro J. Dalseno M. Danilov Z. Doležal D. Dutta S. Eidelman H. Farhat J. E. Fast T. Ferber O. Frost B. G. Fulsom V. Gaur N. Gabyshev S. Ganguly A. Garmash R. Gillard R. Glattauer Y. M. Goh P. Goldenzweig B. Golob D. Greenwald J. Haba P. Hamer K. Hayasaka H. Hayashii X. H. He W.-S. Hou T. Iijima K. Inami A. Ishikawa R. Itoh Y. Iwasaki I. Jaegle D. Joffe K. K. Joo T. Julius E. Kato P. Katrenko T. Kawasaki C. Kiesling D. Y. Kim J. B. Kim K. T. Kim M. J. Kim S. H. Kim Y. J. Kim K. Kinoshita B. R. Ko N. Kobayashi P. Kodyš S. Korpar P. Križan P. Krokovny T. Kuhr R. Kumar T. Kumita A. Kuzmin Y.-J. Kwon I. S. Lee C. Li Y. Li L. Li Gioi J. Libby D. Liventsev A. Loos P. Lukin M. Masuda D. Matvienko H. Miyata R. Mizuk G. B. Mohanty S. Mohanty A. Moll H. K. Moon R. Mussa E. Nakano M. Nakao T. Nanut Z. Natkaniec M. Nayak N. K. Nisar S. Nishida S. Ogawa S. Okuno G. Pakhlova B. Pal C. W. Park H. Park T. K. Pedlar R. Pestotnik M. Petrič L. E. Piilonen C. Pulvermacher M. V. Purohit J. Rauch E. Ribežl M. Ritter A. Rostomyan H. Sahoo Y. Sakai S. Sandilya L. Santelj T. Sanuki Y. Sato V. Savinov O. Schneider G. Schnell C. Schwanda Y. Seino D. Semmler K. Senyo O. Seon M. E. Sevior V. Shebalin C. P. Shen T.-A. Shibata J.-G. Shiu B. Shwartz F. Simon J. B. Singh Y.-S. Sohn A. Sokolov E. Solovieva M. Starič J. Stypula M. Sumihama T. Sumiyoshi U. Tamponi K. Tanida Y. Teramoto M. Uchida S. Uehara T. Uglov Y. Unno S. Uno P. Urquijo Y. Usov C. Van Hulse P. Vanhoefer G. Varner A. Vinokurova V. Vorobyev C. H. Wang M.-Z. Wang P. Wang X. L. Wang M. Watanabe Y. Watanabe S. Wehle E. Won J. Yamaoka S. Yashchenko H. Ye Y. University of South Carolina Columbia South Carolina 29208 Nara Women’s University Nara 630-8506 II. Physikalisches Institut Georg-August-Universität Göttingen 37073 Göttingen High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 SOKENDAI (The Graduate University for Advanced Studies) Hayama 240-0193 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Department of Physics University of Tokyo Tokyo 113-0033 Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Novosibirsk State University Novosibirsk 630090 Pacific Northwest National Laboratory Richland Washington 99352 Middle East Technical University 06531 Ankara Moscow Institute of Physics and Technology Moscow Region 141700 Tata Institute of Fundamental Research Mumbai 400005 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 Panjab University Chandigarh 160014 School of Physics University of Melbourne Victoria 3010 Indian Institute of Technology Guwahati Assam 781039 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 Faculty of Mathematics and Physics Charles University 121 16 Prague Max-Planck-Institut für Physik 80805 München National Central University Chung-li 32054 Hanyang University Seoul 133-791 Moscow Physical Engineering Institute Moscow 115409 Korea Institute of Science and Technology Information Daejeon 305-806 Gyeongsang National University Chinju 660-701 Sungkyunkwan University Suwon 440-746 Wayne State University Detroit Michigan 48202 Excellence Cluster Universe Technische Universität München 85748 Garching Deutsches Elektronen–Synchrotron 22607 Hamburg Institute of High Energy Physics Vienna 1050 Institut für Experimentel

We report inclusive and exclusive measurements for χc1 and χc2 production in B decays. We measure B(B→χc1X)=(3.03±0.05(stat)±0.24(syst))×10−3 and B(B→χc2X)=(0.70±0.06(stat)±0.10(syst))×10−3. For the first time, χc2 production in exclusive B decays in the modes B0→χc2π−K+ and B+→χc2π+π−K+ has been observed, along with first evidence for the B+→χc2π+KS0 decay mode. For χc1 production, we report the first observation in the B+→χc1π+π−K+, B0→χc1π+π−KS0 and B0→χc1π0π−K+ decay modes. Using these decay modes, we observe a difference in the production mechanism of χc2 in comparison to χc1 in B decays. In addition, we report searches for X(3872) and χc1(2P) in the B+→(χc1π+π−)K+ decay mode. The reported results use 772×106 BB¯ events collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider.

关键词： Hadronic decays Leptonic, semileptonic & radiative decays Bottom mesons Quarkonia

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Study of π0 pair production in single-tag two-photon collisions

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Physical Review D 2016年第3期93卷 032003-032003页

作者： M. Masuda S. Uehara Y. Watanabe H. Nakazawa A. Abdesselam I. Adachi H. Aihara S. Al Said D. M. Asner H. Atmacan V. Aulchenko T. Aushev V. Babu I. Badhrees A. M. Bakich E. Barberio P. Behera B. Bhuyan J. Biswal A. Bobrov G. Bonvicini A. Bozek M. Bračko T. E. Browder D. Červenkov V. Chekelian A. Chen B. G. Cheon K. Chilikin R. Chistov K. Cho V. Chobanova S.-K. Choi Y. Choi D. Cinabro J. Dalseno M. Danilov N. Dash J. Dingfelder Z. Doležal Z. Drásal D. Dutta S. Eidelman D. Epifanov H. Farhat J. E. Fast T. Ferber B. G. Fulsom V. Gaur N. Gabyshev A. Garmash R. Gillard F. Giordano R. Glattauer Y. M. Goh P. Goldenzweig B. Golob J. Haba K. Hayasaka H. Hayashii X. H. He W.-S. Hou T. Iijima K. Inami A. Ishikawa R. Itoh Y. Iwasaki I. Jaegle D. Joffe K. K. Joo T. Julius K. H. Kang E. Kato T. Kawasaki D. Y. Kim J. B. Kim J. H. Kim K. T. Kim M. J. Kim S. H. Kim Y. J. Kim B. R. Ko S. Korpar P. Križan P. Krokovny T. Kumita A. Kuzmin Y.-J. Kwon J. S. Lange D. H. Lee I. S. Lee C. Li L. Li Y. Li J. Libby D. Liventsev P. Lukin D. Matvienko K. Miyabayashi H. Miyata R. Mizuk G. B. Mohanty S. Mohanty A. Moll H. K. Moon T. Mori R. Mussa E. Nakano M. Nakao T. Nanut Z. Natkaniec M. Nayak N. K. Nisar S. Nishida S. Ogawa P. Pakhlov G. Pakhlova B. Pal C. W. Park H. Park T. K. Pedlar R. Pestotnik M. Petrič L. E. Piilonen J. Rauch E. Ribežl M. Ritter A. Rostomyan S. Sandilya L. Santelj T. Sanuki Y. Sato V. Savinov O. Schneider G. Schnell C. Schwanda Y. Seino K. Senyo O. Seon M. E. Sevior V. Shebalin C. P. Shen T.-A. Shibata J.-G. Shiu B. Shwartz F. Simon Y.-S. Sohn A. Sokolov E. Solovieva M. Starič M. Sumihama T. Sumiyoshi U. Tamponi K. Tanida Y. Teramoto T. Uglov Y. Unno S. Uno C. Van Hulse P. Vanhoefer G. Varner A. Vinokurova V. Vorobyev A. Vossen M. N. Wagner C. H. Wang M.-Z. Wang P. Wang K. M. Williams E. Won J. Yamaoka Y. Yamashita S. Yashchenko H. Ye Y. Yusa C. C. Zhang Z. P. Zhang V. Zhilich V. Zhulanov A. Zupanc Earthquake Research Institute University of Tokyo Tokyo 113-0032 High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 SOKENDAI (The Graduate University for Advanced Studies) Hayama 240-0193 Kanagawa University Yokohama 221-8686 National Central University Chung-li 32054 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Department of Physics University of Tokyo Tokyo 113-0033 Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Pacific Northwest National Laboratory Richland Washington 99352 Middle East Technical University 06531 Ankara Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Novosibirsk State University Novosibirsk 630090 Moscow Institute of Physics and Technology Moscow Region 141700 Tata Institute of Fundamental Research Mumbai 400005 King Abdulaziz City for Science and Technology Riyadh 11442 School of Physics University of Sydney New South Wales 2006 School of Physics University of Melbourne Victoria 3010 Indian Institute of Technology Madras Chennai 600036 Indian Institute of Technology Guwahati Assam 781039 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 Faculty of Mathematics and Physics Charles University 121 16 Prague Max-Planck-Institut für Physik 80805 München Hanyang University Seoul 133-791 Moscow Physical Engineering Institute Moscow 115409 Korea Institute of Science and Technology Information Daejeon 305-806 Gyeongsang National University Chinju 660-701 Sungkyunkwan University Suwon 440-746 Excellence Cluster Universe Technische Universität München 85748 Garching Indian Institute of Technology Bhubaneswar Satya Nagar 751007 University of Bonn 53115 Bonn Deutsches Elektronen–Synchrotron 22607 Hamburg University of Illinois at Urbana-Champaign Urbana Illinois 61801 Institute of High Energy Physic

We report a measurement of the differential cross section of π0 pair production in single-tag two-photon collisions, γ*γ→π0π0, in e+e− scattering. The cross section is measured for Q2 up to 30 GeV2, where Q2 is... 详细信息

关键词： Particle production Pions Form factors

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Study of excited Ξc states decaying into Ξc0 and Ξc+ baryons

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Physical Review D 2016年第5期94卷 052011-052011页

作者： J. Yelton I. Adachi H. Aihara D. M. Asner V. Aulchenko T. Aushev R. Ayad I. Badhrees S. Bahinipati A. M. Bakich E. Barberio P. Behera B. Bhuyan J. Biswal G. Bonvicini A. Bozek M. Bračko T. E. Browder D. Červenkov A. Chen B. G. Cheon K. Chilikin K. Cho Y. Choi D. Cinabro M. Danilov N. Dash S. Di Carlo Z. Doležal Z. Drásal D. Dutta S. Eidelman H. Farhat J. E. Fast T. Ferber B. G. Fulsom V. Gaur N. Gabyshev A. Garmash R. Gillard P. Goldenzweig T. Hara K. Hayasaka H. Hayashii W.-S. Hou G. Inguglia A. Ishikawa R. Itoh Y. Iwasaki W. W. Jacobs H. B. Jeon D. Joffe K. K. Joo T. Julius K. H. Kang E. Kato Y. Kato D. Y. Kim J. B. Kim K. T. Kim S. H. Kim K. Kinoshita P. Kodyš S. Korpar D. Kotchetkov P. Križan P. Krokovny T. Kumita A. Kuzmin Y.-J. Kwon J. S. Lange C. H. Li H. Li L. Li Y. Li J. Libby D. Liventsev M. Lubej T. Luo M. Masuda T. Matsuda D. Matvienko K. Miyabayashi H. Miyata R. Mizuk G. B. Mohanty A. Moll H. K. Moon T. Nanut K. J. Nath M. Nayak K. Negishi M. Niiyama S. Nishida S. Ogawa S. Okuno P. Pakhlov G. Pakhlova B. Pal C.-S. Park H. Park S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen C. Pulvermacher M. Ritter A. Rostomyan Y. Sakai S. Sandilya L. Santelj T. Sanuki V. Savinov T. Schlüter O. Schneider G. Schnell C. Schwanda Y. Seino K. Senyo O. Seon M. E. Sevior V. Shebalin C. P. Shen T.-A. Shibata J.-G. Shiu A. Sokolov E. Solovieva S. Stanič M. Starič J. F. Strube M. Sumihama T. Sumiyoshi M. Takizawa U. Tamponi K. Tanida F. Tenchini M. Uchida T. Uglov S. Uno P. Urquijo Y. Usov C. Van Hulse G. Varner A. Vinokurova C. H. Wang M.-Z. Wang P. Wang Y. Watanabe E. Widmann K. M. Williams E. Won C. Z. Yuan Z. P. Zhang V. Zhilich V. Zhukova V. Zhulanov A. Zupanc 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 Department of Physics University of Tokyo Tokyo 113-0033 Pacific Northwest National Laboratory Richland Washington 99352 Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Novosibirsk State University Novosibirsk 630090 Moscow Institute of Physics and Technology Moscow Region 141700 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 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 School of Physics University of Melbourne Victoria 3010 Indian Institute of Technology Madras Chennai 600036 Indian Institute of Technology Guwahati Assam 781039 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 Faculty of Mathematics and Physics Charles University 121 16 Prague National Central University Chung-li 32054 Hanyang University Seoul 133-791 P.N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991 Moscow Physical Engineering Institute Moscow 115409 Korea Institute of Science and Technology Information Daejeon 305-806 Sungkyunkwan University Suwon 440-746 Tata Institute of Fundamental Research Mumbai 400005 Deutsches Elektronen–Synchrotron 22607 Hamburg Institut für Experimentelle Kernphysik Karlsruher Institut für Technologie 76131 Karlsruhe Niigata University Niigata 950-2181 Nara Women’s University Nara 630-8506 Department of Physics National Taiwan University Taipei 10617 Department of Physics Tohoku University Sendai 980-8578 Indiana University Bloomington Indiana 47408 Kyungpook National University Daegu 702-701 Kennesaw State Univ

Using a data sample of 980 fb−1 of e+e− annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy e+e− collider, we report the results of a study of excited Ξc states that decay, via the emission of photons and/or charged pions, into Ξc0 or Ξc+ ground state charmed-strange baryons. We present new measurements of the masses of all members of the Ξc′, Ξc(2645), Ξc(2790), Ξc(2815), and Ξc(2980) isodoublets, measurements of the intrinsic widths of those that decay strongly, and evidence of previously unknown transitions.

关键词： Baryons Charmed baryons

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Measurement of the CKM angle φ1 in B0→D¯(*)0h0, D¯0→KS0π+π− decays with time-dependent binned Dalitz plot analysis

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Physical Review D 2016年第5期94卷 052004-052004页

作者： V. Vorobyev I. Adachi H. Aihara D. M. Asner T. Aushev R. Ayad I. Badhrees S. Bahinipati A. M. Bakich P. Behera V. Bhardwaj B. Bhuyan J. Biswal A. Bobrov A. Bondar A. Bozek M. Bračko T. E. Browder D. Červenkov V. Chekelian A. Chen B. G. Cheon K. Chilikin R. Chistov K. Cho V. Chobanova Y. Choi D. Cinabro M. Danilov N. Dash S. Di Carlo Z. Doležal Z. Drásal A. Drutskoy D. Dutta S. Eidelman D. Epifanov H. Farhat J. E. Fast T. Ferber B. G. Fulsom V. Gaur N. Gabyshev A. Garmash P. Goldenzweig D. Greenwald J. Haba K. Hayasaka H. Hayashii W.-S. Hou K. Inami G. Inguglia A. Ishikawa R. Itoh Y. Iwasaki W. W. Jacobs I. Jaegle D. Joffe K. K. Joo T. Julius K. H. Kang C. Kiesling D. Y. Kim H. J. Kim J. B. Kim K. T. Kim S. H. Kim K. Kinoshita P. Kodyš D. Kotchetkov P. Križan P. Krokovny R. Kumar T. Kumita Y.-J. Kwon J. S. Lange C. H. Li H. Li L. Li Y. Li J. Libby D. Liventsev M. Lubej M. Masuda T. Matsuda D. Matvienko K. Miyabayashi H. Miyata R. Mizuk G. B. Mohanty A. Moll H. K. Moon R. Mussa M. Nakao T. Nanut K. J. Nath M. Nayak K. Negishi S. Nishida S. Ogawa S. Okuno P. Pakhlov G. Pakhlova B. Pal C.-S. Park C. W. Park H. Park S. Paul T. K. Pedlar R. Pestotnik M. Petrič L. E. Piilonen J. Rauch M. Ritter Y. Sakai S. Sandilya T. Sanuki V. Savinov T. Schlüter O. Schneider G. Schnell C. Schwanda A. J. Schwartz Y. Seino K. Senyo M. E. Sevior V. Shebalin C. P. Shen T.-A. Shibata J.-G. Shiu B. Shwartz F. Simon A. Sokolov E. Solovieva M. Starič J. F. Strube T. Sumiyoshi M. Takizawa F. Tenchini K. Trabelsi M. Uchida T. Uglov S. Uno P. Urquijo Y. Usov C. Van Hulse P. Vanhoefer G. Varner K. E. Varvell A. Vinokurova C. H. Wang M.-Z. Wang P. Wang Y. Watanabe K. M. Williams E. Won J. Yamaoka Y. Yamashita S. Yashchenko J. Yelton Z. P. Zhang V. Zhilich V. Zhukova V. Zhulanov A. Zupanc Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Novosibirsk State University Novosibirsk 630090 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 Pacific Northwest National Laboratory Richland Washington 99352 Moscow Institute of Physics and Technology Moscow Region 141700 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 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 Indian Institute of Science Education and Research Mohali SAS Nagar 140306 Indian Institute of Technology Guwahati Assam 781039 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 Faculty of Mathematics and Physics Charles University 121 16 Prague Max-Planck-Institut für Physik 80805 Munich National Central University Chung-li 32054 Hanyang University Seoul 133-791 P. N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991 Moscow Physical Engineering Institute Moscow 115409 Korea Institute of Science and Technology Information Daejeon 305-806 Sungkyunkwan University Suwon 440-746 Wayne State University Detroit Michigan 48202 Tata Institute of Fundamental Research Mumbai 400005 Deutsches Elektronen-Synchrotron 22607 Hamburg Institut für Experimentelle Kernphysik Karlsruher Institut für Technologie 76131 Karlsruhe Department of Physics Technische Universität München 85748 Garching Niigata University Niigata 950-2181 Nara Women’s University Nara 630-8506 Department of Physics National Taiwan University Taipei 10617 Graduate School of Science Nagoya University Nagoya 464-8602 Department of Phy

We report a measurement of the CP-violation parameter φ1 obtained in a time-dependent analysis of B0→D¯(*)0h0 decays followed by D¯0→KS0π+π− decay. A model-independent measurement is performed using the binned Dalitz plot technique. The measured value is φ1=11.7°±7.8°(stat)±2.1°(syst). Treating sin2φ1 and cos2φ1 as independent parameters, we obtain sin2φ1=0.43±0.27(stat)±0.08(syst) and cos2φ1=1.06±0.33(stat)−0.15+0.21(syst). The results are obtained with a full data sample of 772×106BB¯ pairs collected near the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider.

关键词： Bottom mesons CP symmetry

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Measurement of the branching ratio of B¯0→D*+τ−ν¯τ relative to B¯0→D*+ℓ−ν¯ℓ decays with a semileptonic tagging method

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Physical Review D 2016年第7期94卷 072007-072007页

作者： Y. Sato T. Iijima K. Adamczyk H. Aihara D. M. Asner H. Atmacan T. Aushev R. Ayad T. Aziz V. Babu I. Badhrees A. M. Bakich V. Bansal P. Behera V. Bhardwaj B. Bhuyan J. Biswal G. Bonvicini A. Bozek M. Bračko D. Červenkov P. Chang V. Chekelian A. Chen B. G. Cheon K. Chilikin R. Chistov K. Cho V. Chobanova Y. Choi D. Cinabro M. Danilov N. Dash S. Di Carlo Z. Doležal D. Dutta S. Eidelman D. Epifanov H. Farhat J. E. Fast T. Ferber B. G. Fulsom V. Gaur N. Gabyshev A. Garmash P. Goldenzweig B. Golob D. Greenwald K. Hara T. Hara J. Hasenbusch K. Hayasaka H. Hayashii S. Hirose T. Horiguchi W.-S. Hou K. Inami A. Ishikawa R. Itoh Y. Iwasaki I. Jaegle H. B. Jeon D. Joffe T. Julius K. H. Kang Y. Kato P. Katrenko T. Kawasaki D. Y. Kim J. B. Kim K. T. Kim M. J. Kim S. H. Kim Y. J. Kim K. Kinoshita P. Kodyš S. Korpar D. Kotchetkov P. Krokovny T. Kuhr R. Kumar Y.-J. Kwon J. S. Lange C. H. Li L. Li Y. Li L. Li Gioi J. Libby D. Liventsev T. Luo M. Masuda T. Matsuda D. Matvienko K. Miyabayashi H. Miyata R. Mizuk G. B. Mohanty A. Moll H. K. Moon K. R. Nakamura E. Nakano M. Nakao T. Nanut K. J. Nath Z. Natkaniec M. Nayak K. Negishi N. K. Nisar S. Nishida S. Ogawa S. Okuno S. L. Olsen Y. Onuki P. Pakhlov G. Pakhlova B. Pal C.-S. Park S. Paul T. K. Pedlar L. Pesántez R. Pestotnik M. Petrič L. E. Piilonen M. V. Purohit J. Rauch A. Rostomyan M. Rozanska Y. Sakai S. Sandilya L. Santelj V. Savinov T. Schlüter O. Schneider G. Schnell C. Schwanda A. J. Schwartz Y. Seino K. Senyo O. Seon M. E. Sevior V. Shebalin C. P. Shen T.-A. Shibata J.-G. Shiu B. Shwartz F. Simon E. Solovieva S. Stanič M. Starič J. F. Strube T. Sumiyoshi M. Takizawa U. Tamponi F. Tenchini K. Trabelsi M. Uchida S. Uno P. Urquijo Y. Ushiroda Y. Usov C. Van Hulse G. Varner A. Vinokurova V. Vorobyev C. H. Wang M.-Z. Wang P. Wang Y. Watanabe K. M. Williams E. Won H. Yamamoto J. Yamaoka Y. Yamashita J. Yelton Y. Yook C. Z. Yuan Y. Yusa Z. P. Zhang V. Zhilich V. Zhukova V. Zhulanov A. Zupanc Kobayashi-Maskawa Institute Nagoya University Nagoya 464-8602 High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 Graduate School of Science Nagoya University Nagoya 464-8602 H. Niewodniczanski Institute of Nuclear Physics Krakow 31-342 Department of Physics University of Tokyo Tokyo 113-0033 Pacific Northwest National Laboratory Richland Washington 99352 Middle East Technical University 06531 Ankara Moscow Institute of Physics and Technology Moscow Region 141700 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Tata Institute of Fundamental Research Mumbai 400005 King Abdulaziz City for Science and Technology Riyadh 11442 School of Physics University of Sydney New South Wales 2006 Indian Institute of Technology Madras Chennai 600036 Indian Institute of Science Education and Research Mohali SAS Nagar 140306 Indian Institute of Technology Guwahati Assam 781039 J. Stefan Institute 1000 Ljubljana Wayne State University Detroit Michigan 48202 University of Maribor 2000 Maribor Faculty of Mathematics and Physics Charles University 121 16 Prague 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 Moscow Physical Engineering Institute Moscow 115409 Korea Institute of Science and Technology Information Daejeon 305-806 Sungkyunkwan University Suwon 440-746 Indian Institute of Technology Bhubaneswar Satya Nagar 751007 Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Novosibirsk State University Novosibirsk 630090 Deutsches Elektronen–Synchrotron 22607 Hamburg Institut für Experimentelle Kernphysik Karlsruher Institut für Technologie 76131 Karlsruhe Faculty of Mathematics and Physics University of Ljubljana 1000 Ljubljana Department of Physics Technische Universität München 85748 Garching SOKENDAI (The Graduate Univer

We report a measurement of the ratio R(D*)=B(B¯0→D*+τ−ν¯τ)/B(B¯0→D*+ℓ−ν¯ℓ), where ℓ denotes an electron or a muon. The results are based on a data sample containing 772×106 BB¯ pairs recorded at the ϒ(4S) resonance with the Belle detector at the KEKB e+e− collider. We select a sample of B0B¯0 pairs by reconstructing both B mesons in semileptonic decays to D*∓ℓ±. We measure R(D*)=0.302±0.030(stat)±0.011(syst), which is within 1.6σ of the Standard Model theoretical expectation, where the standard deviation σ includes systematic uncertainties. We use this measurement to constrain several scenarios of new physics in a model-independent approach.

关键词： Bottom quark

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Search for a dark vector gauge boson decaying to π+π− using η→π+π−γ decays

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Physical Review D 2016年第9期94卷 092006-092006页

作者： E. Won I. Adachi H. Aihara S. Al Said D. M. Asner T. Aushev R. Ayad I. Badhrees A. M. Bakich V. Bansal E. Barberio P. Behera B. Bhuyan J. Biswal A. Bobrov A. Bozek M. Bračko D. Červenkov V. Chekelian A. Chen B. G. Cheon K. Chilikin R. Chistov K. Cho V. Chobanova Y. Choi D. Cinabro N. Dash S. Di Carlo Z. Doležal Z. Drásal D. Dutta S. Eidelman D. Epifanov H. Farhat J. E. Fast T. Ferber B. G. Fulsom V. Gaur N. Gabyshev A. Garmash R. Gillard P. Goldenzweig D. Greenwald J. Haba K. Hayasaka H. Hayashii W.-S. Hou T. Iijima K. Inami G. Inguglia A. Ishikawa R. Itoh Y. Iwasaki I. Jaegle H. B. Jeon D. Joffe K. K. Joo T. Julius K. H. Kang T. Kawasaki D. Y. Kim J. B. Kim K. T. Kim M. J. Kim S. H. Kim Y. J. Kim K. Kinoshita P. Kodyš P. Križan P. Krokovny T. Kuhr R. Kulasiri Y.-J. Kwon J. S. Lange I. S. Lee C. H. Li L. Li Y. Li L. Li Gioi J. Libby D. Liventsev T. Luo M. Masuda T. Matsuda D. Matvienko K. Miyabayashi H. Miyata R. Mizuk G. B. Mohanty E. Nakano M. Nakao H. Nakazawa T. Nanut K. J. Nath Z. Natkaniec M. Nayak S. Nishida S. Ogawa S. Okuno P. Pakhlov B. Pal C.-S. Park S. Paul T. K. Pedlar L. E. Piilonen C. Pulvermacher J. Rauch M. Ritter H. Sahoo Y. Sakai S. Sandilya L. Santelj T. Sanuki Y. Sato V. Savinov T. Schlüter O. Schneider G. Schnell C. Schwanda Y. Seino D. Semmler K. Senyo O. Seon I. S. Seong V. Shebalin C. P. Shen T. -A. Shibata J.-G. Shiu F. Simon M. Starič T. Sumiyoshi M. Takizawa U. Tamponi F. Tenchini K. Trabelsi M. Uchida S. Uehara T. Uglov Y. Unno S. Uno P. Urquijo Y. Usov C. Van Hulse G. Varner K. E. Varvell V. Vorobyev C. H. Wang M.-Z. Wang M. Watanabe Y. Watanabe E. Widmann J. Yamaoka H. Ye Y. Yook C. Z. Yuan Y. Yusa Z. P. Zhang V. Zhilich V. Zhukova V. Zhulanov A. Zupanc Korea University Seoul 02841 Korea High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 Japan SOKENDAI (The Graduate University for Advanced Studies) Hayama 240-0193 Japan Department of Physics University of Tokyo Tokyo 113-0033 Japan Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Saudi Arabia Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia Pacific Northwest National Laboratory Richland Washington 99352 USA Moscow Institute of Physics and Technology Moscow Region 141700 Russia King Abdulaziz City for Science and Technology Riyadh 11442 Saudi Arabia School of Physics University of Sydney New South Wales 2006 Australia School of Physics University of Melbourne Victoria 3010 Australia Indian Institute of Technology Madras Chennai 600036 India Indian Institute of Technology Guwahati Assam 781039 India J. Stefan Institute 1000 Ljubljana Slovenia Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Russia Novosibirsk State University Novosibirsk 630090 Russia H. Niewodniczanski Institute of Nuclear Physics Krakow 31-342 Poland University of Maribor 2000 Maribor Slovenia Faculty of Mathematics and Physics Charles University 121 16 Prague Czech Republic Max-Planck-Institut für Physik 80805 München Germany National Central University Chung-li 32054 Taiwan Hanyang University Seoul 133-791 Korea P.N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991 Russia Moscow Physical Engineering Institute Moscow 115409 Russia Korea Institute of Science and Technology Information Daejeon 305-806 Korea Sungkyunkwan University Suwon 440-746 Korea Wayne State University Detroit Michigan 48202 USA Indian Institute of Technology Bhubaneswar Satya Nagar 751007 India Tata Institute of Fundamental Research Mumbai 400005 India Deutsches Elektronen–Synchrotron 22607 Hamburg Germany Institut für Experimentelle Kernphysik Karlsruher Institut für Technologie

We report a search for a dark vector gauge boson U′ that couples to quarks in the decay chain D*+→D0π+,D0→KS0η,η→U′γ, U′→π+π−. No signal is found and we set a mass-dependent limit on the baryonic fine structure constant of 10−3−10−2 in the U′ mass range of 290 to 520 MeV/c2. This analysis is based on a data sample of 976 fb−1 collected by the Belle experiment at the KEKB asymmetric-energy e+e− collider.

关键词： Extensions of gauge sector Light mesons Lepton colliders

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Authentic learning in network and security with portable labs

Authentic learning in network and security with portable lab...

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Frontiers in Education (FIE) Conference

作者： Dan Chia-Tien Lo Kai Qian Wei Chen Hossain Shahriar Victor Clincy Department of Computer Science and Software Engineering Southern Polytechnic State University Marietta GA USA Department of Computer Science Tennessee State University Nashville TN USA Department of Computer Science Kennesaw State University Kennesaw GA USA

This paper is addressing the challenges of incorporating networking and security concepts into effective teaching and learning platform (PLab) that highlights real-world technical issues. PLab is an innovative portable learning platform that allows network applications to be safely tested. The isolated network without the need for a server promotes learning at anytime and anywhere. The strong connection between academic subjects and reality and digital-native students' everyday lives engages students in learning this emerging field, and better prepares students for the high industrial demands in mobile application development workforce. Moreover, this pedagogical model will help faculty develop expertise in the latest development of networking and security. The modular labware is designed to offer faculty the flexibility to implement it in many existing courses. Curricular materials will be delivered on Google cloud for its sustainability. This "ready-to-adopt" model will greatly save resources and time for enhancing modern networking and security education to meet the emerging workforce.

关键词： Security Mobile communication Educational institutions Internet IP networks Computer science

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Proceedings from the 9th annual conference on the science of dissemination and implementation: Washington, DC, USA. 14-15 December 2016

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Implement Sci 2017年第SUPPL 1期12卷 48-48页

作者： David Chambers Lisa Simpson Gila Neta Ulrica von Thiele Schwarz Antoinette Percy-Laurry Gregory A. Aarons Ross Brownson Amanda Vogel Shannon Wiltsey Stirman Kenneth Sherr Rachel Sturke Wynne E. Norton Allyson Varley Cynthia Vinson Lisa Klesges Suzanne Heurtin-Roberts M. Rashad Massoud Leighann Kimble Arne Beck Claire Neely Jennifer Boggs Carmel Nichols Wen Wan Erin Staab Neda Laiteerapong Nathalie Moise Ravi Shah Susan Essock Margaret Handley Amy Jones Jay Carruthers Karina Davidson Lauren Peccoralo Lloyd Sederer Todd Molfenter Ashley Scudder Sarah Taber-Thomas Kristen Schaffner Amy Herschell Eva Woodward Jeffery Pitcock Mona Ritchie JoAnn Kirchner Julia E. Moore Sobia Khan Shusmita Rashid Jamie Park Melissa Courvoisier Sharon Straus Daniel Blonigen Allison Rodriguez Luisa Manfredi Andrea Nevedal Joel Rosenthal David Smelson Christine Timko Nicole Stadnick Jennifer Regan Miya Barnett Anna Lau Lauren Brookman-Frazee Erick Guerrero Karissa Fenwick Yinfei Kong Gregory Aarons Rebecca Lengnick-Hall Benjamin Henwood Nina Sayer Craig Rosen Robert Orazem Brandy Smith Lindsey Zimmerman David Lounsbury Rachel Kimerling Jodie A. Trafton Steven Lindley Rahul Bhargava Hal Roberts Laura Gibson Gabriel J. Escobar Vincent Liu Benjamin Turk Arona Ragins Patricia Kipnis Ashley Ketterer Gruszkowski Michael W. Kennedy Emily Rentschler Drobek Lior Turgeman Aleksandra Sasha Milicevic Terrence L. Hubert Larissa Myaskovsky Youxu C. Tjader Robert J. Monte Kathryn G. Sapnas Edmond Ramly Diane R Lauver Christie M Bartels Shereef Elnahal Andrea Ippolito Hillary Peabody Carolyn Clancy Randall Cebul Thomas Love Douglas Einstadter Shari Bolen Brook Watts Vera Yakovchenko Angela Park William Lukesh Donald R. Miller David Thornton Mari-Lynn Drainoni Allen L. Gifford Shawna Smith Julia Kyle Mark S Bauer Daniel Eisenberg Celeste Liebrecht Michelle Barbaresso Amy Kilbourne Elyse Park Giselle Perez Jamie Ostroff Sarah Greene Michael Parchman Brian Austin Eric Larson Stefanie Ferreri Chris Shea Megan Smith Kea Turner Jennifer Bacci Kyle Bigham Geoffr Division of Cancer Control and Population Sciences National Cancer Institute Rockville MD 20850 USA AcademyHealth Washington DC 20009 USA Department of Learning Informatics Management and Ethics Karolinska Institutet Stockholm 17177 Sweden Department of Psychiatry University of California San Diego San Diego CA 92093 USA George Warren Brown School of Social Work Washington University in St. Louis St. Louis MO 63130 USA Center for Global Health National Cancer Institute Rockville MD 20850 USA Dissemination and Training Division VA National Center for PTSD Palo Alto CA 94305 USA Department of Global Health University of Washington Seattle WA 98105 USA Center for Global Health Studies Fogarty International Center National Institutes of Health Bethesda MD 20912 USA School of Public Health University of Alabama at Birmingham Birmingham AL 35243 USA School of Public Health University of Memphis Memphis TN 38152 USA USAID Applying Science to Strengthen and Improve Systems (ASSIST) Project Bethesda Maryland 20814 USA Institute for Health Research Kaiser Permanente Denver CO 80231 USA ICSI Institute for Clinical Systems Improvement Bloomington MN 55425 USA Medicine University of Chicago Chicago IL 60637 USA Medicine Columbia University Medical Center New York NY 10032 USA Psychiatry Columbia University New York NY 10032 USA General Internal Medicine Epidemiology and Biostatistics University of California San Francisco San Francisco CA 94110 USA New York State Office of Mental Health New York NY 10001 USA Medicine Icahn School of Medicine at Mount Sinai New York NY 10029 USA Center for Health Enhancement System Studies University of Wisconsin Madison WI 53706 USA Department of Psychiatry University of Pittsburgh Pittsburgh PA 15213 USA Psychology University at Buffalo Buffalo NY 14260 USA Department of Psychology West Virginia University Morgantown WV 26506 USA MIRECC VA North Little Rock AR 72114 USA QUERI for Team-Based Behavioral Health Centr

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First Observation of the Hadronic Transition ϒ(4S)→ηhb(1P) and New Measurement of the hb(1P) and ηb(1S) Parameters

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Physical Review Letters 2015年第14期115卷 142001-142001页

作者： U. Tamponi R. Mussa A. Abdesselam H. Aihara K. Arinstein D. M. Asner H. Atmacan T. Aushev R. Ayad I. Badhrees A. M. Bakich E. Barberio V. Bhardwaj B. Bhuyan J. Biswal A. Bondar G. Bonvicini A. Bozek M. Bračko T. E. Browder D. Červenkov A. Chen B. G. Cheon K. Cho V. Chobanova S.-K. Choi Y. Choi D. Cinabro M. Danilov Z. Doležal Z. Drásal A. Drutskoy S. Eidelman D. Epifanov H. Farhat J. E. Fast T. Ferber B. G. Fulsom V. Gaur N. Gabyshev A. Garmash D. Getzkow R. Gillard Y. M. Goh B. Golob J. Haba K. Hayasaka H. Hayashii X. H. He M. T. Hedges W.-S. Hou T. Iijima K. Inami A. Ishikawa I. Jaegle D. Joffe T. Julius E. Kato P. Katrenko H. Kichimi C. Kiesling D. Y. Kim H. J. Kim J. H. Kim K. T. Kim S. H. Kim K. Kinoshita P. Kodyš S. Korpar P. Križan P. Krokovny T. Kumita A. Kuzmin J. S. Lange P. Lewis J. Libby P. Lukin D. Matvienko K. Miyabayashi H. Miyata R. Mizuk G. B. Mohanty A. Moll T. Mori E. Nakano M. Nakao T. Nanut Z. Natkaniec M. Nayak N. K. Nisar S. Nishida S. Ogawa S. Okuno S. L. Olsen W. Ostrowicz C. Oswald G. Pakhlova B. Pal H. Park T. K. Pedlar L. Pesántez R. Pestotnik M. Petrič L. E. Piilonen E. Ribežl M. Ritter A. Rostomyan S. Ryu Y. Sakai S. Sandilya L. Santelj T. Sanuki Y. Sato V. Savinov O. Schneider G. Schnell C. Schwanda D. Semmler K. Senyo M. E. Sevior M. Shapkin V. Shebalin C. P. Shen T.-A. Shibata J.-G. Shiu B. Shwartz A. Sibidanov F. Simon Y.-S. Sohn A. Sokolov M. Starič M. Steder J. Stypula K. Tanida Y. Teramoto K. Trabelsi M. Uchida T. Uglov Y. Unno S. Uno P. Urquijo C. Van Hulse P. Vanhoefer G. Varner A. Vinokurova A. Vossen M. N. Wagner M.-Z. Wang X. L. Wang Y. Watanabe K. M. Williams E. Won J. Yamaoka S. Yashchenko Z. P. Zhang V. Zhilich V. Zhulanov A. Zupanc INFN—Sezione di Torino 10125 Torino University of Torino 10124 Torino Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Department of Physics University of Tokyo Tokyo 113-0033 Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University Novosibirsk 630090 Pacific Northwest National Laboratory Richland Washington 99352 Middle East Technical University 06531 Ankara Moscow Institute of Physics and Technology Moscow Region 141700 Institute for Theoretical and Experimental Physics Moscow 117218 King Abdulaziz City for Science and Technology Riyadh 11442 School of Physics University of Sydney New South Wales 2006 School of Physics University of Melbourne Victoria 3010 University of South Carolina Columbia South Carolina 29208 Indian Institute of Technology Guwahati Assam 781039 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 Faculty of Mathematics and Physics Charles University 121 16 Prague National Central University Chung-li 32054 Hanyang University Seoul 133-791 Korea Institute of Science and Technology Information Daejeon 305-806 Max-Planck-Institut für Physik 80805 München Gyeongsang National University Chinju 660-701 Sungkyunkwan University Suwon 440-746 Moscow Physical Engineering Institute Moscow 115409 Deutsches Elektronen–Synchrotron 22607 Hamburg Tata Institute of Fundamental Research Mumbai 400005 Justus-Liebig-Universität Gießen 35392 Gießen Faculty of Mathematics and Physics University of Ljubljana 1000 Ljubljana High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 SOKENDAI (The Graduate University for Advanced Studies) Hayama 240-0193 Kobayashi-Maskawa Institute Nagoya University Nagoya 464-8602 Nara Women’s University Nara 630-8506 Peking University Beijing 100871 Department of Physics National Taiwan University Taipei 10617 Grad

Using a sample of 771.6×106 ϒϒ(4S) decays collected by the Belle experiment at the KEKB e+e− collider, we observe, for the first time, the transition ϒ(4S)→ηhb(1P) with the branching fraction B[ϒ(4S)→ηhb(1P)]=(2.18±0.11±0.18)×10−3 and we measure the hb(1P) mass Mhb(1P)=(9899.3±0.4±1.0) MeV/c2, corresponding to the hyperfine (HF) splitting ΔMHF(1P)=(0.6±0.4±1.0) MeV/c2. Using the transition hb(1P)→γηb(1S), we measure the ηb(1S) mass Mηb(1S)=(9400.7±1.7±1.6) MeV/c2, corresponding to ΔMHF(1S)=(59.6±1.7±1.6) MeV/c2, the ηb(1S) width Γηb(1S)=(8−5+6±5) MeV/c2 and the branching fraction B[hb(1P)→γηb(1S)]=(56±8±4)%.

关键词： Heavy quark effective theory Quarkonia Lepton colliders

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