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arXiv 2019年

作者： Abt, I. Adamczyk, L. Aggarwal, R. Aushev, V. Behnke, O. Behrens, U. Bertolin, A. Bloch, I. Brock, I. Brook, N.H. Brugnera, R. Bruni, A. Bussey, P.J. Caldwell, A. Capua, M. Catterall, C.D. Chwastowski, J. Ciborowski, J. Ciesielski, R. Cooper-Sarkar, A.M. Corradi, M. Dementiev, R.K. Dusini, S. Ferrando, J. Foster, B. Gallo, E. Gangadharan, D. Garfagnini, A. Geiser, A. Gladilin, L.K. Golubkov, Yu.A. Grzelak, G. Gwenlan, C. Hochman, D. Jomhari, N.Z. Kadenko, I. Kananov, S. Karshon, U. Kaur, P. Klanner, R. Klein, U. Korzhavina, I.A. Kovalchuk, N. Kowalski, H. Kuprash, O. Kuze, M. Levchenko, B.B. Levy, A. Löhr, B. Lohrmann, E. Longhin, A. Lukina, O.Yu. Makarenko, I. Malka, J. Masciocchi, S. Nagano, K. Nam, J.D. Onderwaater, J. Onishchuk, Yu. Paul, E. Pidhurskyi, I. Polini, A. Przybycień, M. Quintero, A. Ruspa, M. Saxon, D.H. Schneekloth, U. Schörner-Sadenius, T. Selyuzhenkov, I. Shchedrolosiev, M. Shcheglova, L.M. Shkola, O. Skillicorn, I.O. Slomiński, W. Solano, A. Stanco, L. Stefaniuk, N. Stopa, P. Surrow, B. Sztuk-Dambietz, J. Tassi, E. Tokushuku, K. Turcato, M. Turkot, O. Tymieniecka, T. Verbytskyi, A. Wan Abdullah, W.A.T. Wichmann, K. Wing, M. Yamada, S. Yamazaki, Y. Żarnecki, A.F. Zawiejski, L. Zenaiev, O. INFN Bologna Bologna Italy Physikalisches Institut der Universität Bonn Bonn Germany Panjab University Department of Physics Chandigarh India Calabria University Physics Department and INFN Cosenza Italy National Centre for Particle Physics Universiti Malaya Kuala Lumpur50603 Malaysia Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Krakow Poland AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Jagellonian University Krakow Poland Deutsches Elektronen-Synchrotron DESY Hamburg Germany Deutsches Elektronen-Synchrotron DESY Zeuthen Germany School of Physics and Astronomy University of Glasgow Glasgow United Kingdom GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany Hamburg University Institute of Experimental Physics Hamburg Germany Physikalisches Institut of the University of Heidelberg Heidelberg Germany Institute of Particle and Nuclear Studies KEK Tsukuba Japan Department of Physics Kobe University Kobe Japan Department of Nuclear Physics National Taras Shevchenko University of Kyiv Kyiv Ukraine Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics Moscow Russia Max-Planck-Institut für Physik München Germany Department of Physics University of Oxford Oxford United Kingdom INFN Padova Padova Italy Dipartimento di Fisica e Astronomia dell' Università and INFN Padova Italy Raymond and Beverly Sackler Faculty of Exact Sciences School of Physics Tel Aviv University Tel Aviv Israel Department of Physics Temple University PhiladelphiaPA19122 United States Department of Physics Tokyo Institute of Technology Tokyo Japan Università di Torino INFN Torino Italy Università del Piemonte Orientale Novara and INFN Torino Italy Physics and Astronomy Department University College London London United Kingdom Faculty of Physics University of Warsaw Warsaw Poland National Centre for Nuclear Research Warsaw

Charm production in charged current deep inelastic scattering has been measured for the first time in e±p collisions, using data collected with the ZEUS detector at HERA, corresponding to an integrated luminosity of 358 pb−1. Results are presented separately for e+p and e−p scattering at a centre-of-mass energy of √s = 318 GeV within a kinematic phase-space region of 200 GeV2 2 2 and y 2 is the squared four-momentum transfer and y is the inelasticity. The measured cross sections of electroweak charm production are consistent with expectations from the Standard Model within the large statistical uncertainties. Copyright © 2019, The Authors. All rights reserved.

关键词： Germanium alloys

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Measurement of the branching fraction of the decay B0s→ K0sk0s

arXiv

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arXiv 2020年

作者： Aaij, R. Beteta, C. Abellán Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C.A. Aiola, S. Ajaltouni, Z. Akar, S. Albicocco, P. Albrecht, J. Alessio, F. Alexander, M. Albero, A. Alfonso Alkhazov, G. Cartelle, P. Alvarez Alves, A.A. Amato, S. Amhis, Y. An, L. Anderlini, L. Andreassi, G. Andreotti, M. Archilli, F. Romeu, J. Arnau Artamonov, A. Artuso, M. Arzymatov, K. Aslanides, E. Atzeni, M. Audurier, B. Bachmann, S. Back, J.J. Baker, S. Balagura, V. Baldini, W. Baranov, A. Barlow, R.J. Barsuk, S. Barter, W. Bartolini, M. Baryshnikov, F. Bassi, G. Batozskaya, V. Batsukh, B. Battig, A. Battista, V. Bay, A. Becker, M. Bedeschi, F. Bediaga, I. Beiter, A. Bel, L.J. Belavin, V. Belin, S. Beliy, N. Bellee, V. Belous, K. Belyaev, I. Bencivenni, G. Ben-Haim, E. Benson, S. Beranek, S. Berezhnoy, A. Bernet, R. Berninghoff, D. Bernstein, H.C. Bertholet, E. Bertolin, A. Betancourt, C. Betti, F. Bettler, M.O. Bezshyiko, I.A. Bhasin, S. Bhom, J. Bieker, M.S. Bifani, S. Billoir, P. Bizzeti, A. Bjørn, M. Blago, M.P. Blake, T. Blanc, F. Blusk, S. Bobulska, D. Bocci, V. Garcia, O. Boente Boettcher, T. Boldyrev, A. Bondar, A. Bondar, N. Borghi, S. Borisyak, M. Borsato, M. Borsuk, J.T. Bowcock, T.J.V. Bozzi, C. Braun, S. Rodriguez, A. Brea Brodski, M. Brodzicka, J. Gonzalo, A. Brossa Brundu, D. Buchanan, E. Buonaura, A. Burr, C. Bursche, A. Butter, J.S. Buytaert, J. Byczynski, W. Cadeddu, S. Cai, H. Calabrese, R. Cali, S. Calladine, R. Calvi, M. Gomez, M. Calvo Camboni, A. Campana, P. Perez, D. H. Campora Capriotti, L. Carbone, A. Carboni, G. Cardinale, R. Cardini, A. Carniti, P. Akiba, K. Carvalho Vidal, A. Casais Casse, G. Cattaneo, M. Cavallero, G. Cenci, R. Cerasoli, J. Chapman, M.G. Charles, M. Charpentier, Ph. Chatzikonstantinidis, G. Chefdeville, M. Chekalina, V. Chen, C. Chen, S. Chernov, A. Chitic, S.-G. Chobanova, V. Chrzaszcz, M. Chubykin, A. Ciambrone, P. Cicala, M.F. Vidal, X. Cid Ciezarek, G. Cindolo, F. Clarke, P.E.L. Clemencic, M. Rio de Janeiro Brazil Rio de Janeiro Brazil Center for High Energy Physics Tsinghua University Beijing China School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China University of Chinese Academy of Sciences Beijing China Beijing China Institute of Particle Physics Central China Normal University Wuhan Hubei China Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS IN2P3-LAPP Annecy France Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Aix Marseille Univ CNRS/IN2P3 CPPM Marseille France Laboratoire de Physique des 2 Infinis Irène Joliot-Curie IJCLab Orsay France LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité CNRS/IN2P3 Paris France I. Physikalisches Institut RWTH Aachen University Aachen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Heidelberg Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany School of Physics University College Dublin Dublin Ireland INFN Sezione di Bari Bari Italy INFN Sezione di Bologna Bologna Italy INFN Sezione di Ferrara Ferrara Italy INFN Sezione di Firenze Firenze Italy INFN Laboratori Nazionali di Frascati Frascati Italy INFN Sezione di Genova Genova Italy INFN Sezione di Milano-Bicocca Milano Italy INFN Sezione di Milano Milano Italy INFN Sezione di Cagliari Monserrato Italy INFN Sezione di Padova Padova Italy INFN Sezione di Pisa Pisa Italy INFN Sezione di Roma Tor Vergata Roma Italy INFN Sezione di Roma La Sapienza Roma Italy Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Nikhef National Institute for Subatomic Physics VU University Amsterdam Amsterdam Netherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Kraków Poland AGH - University of Science and Technology Faculty of Physics and Applied Computer Science Kraków Poland Warsaw Poland Horia Hulubei National Institute of Physics and Nuc

A measurement of the branching fraction of the decay B0s→ K0sK0sis performed using proton-proton collision data corresponding to an integrated luminosity of 5 fb-collected by the LHCb experiment between 2011 and 2016. The branching fraction is determined to be B(B0s→ K0sK0s) = [8.3 ± 1.6 (stat) ± 0.9 (syst) ± 0.8 (norm) ± 0.3 (f s/f d)] × 10-6, where the first uncertainty is statistical, the second is systematic, and the third and fourth are due to uncertainties on the B0× φ K0sbranching fraction and the ratio of hadronization fractions fs/fd. This is the most precise measurement of this branching fraction to date. Furthermore, a measurement of the branching fraction of the decay B0→ K0sK0sis performed relative to that of the B0s→ K0sK0schannel, and is found to be (equation presented). Copyright © 2020, The Authors. All rights reserved.

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The LOFAR Two-metre Sky Survey V. Second data release

arXiv

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arXiv 2022年

作者： Shimwell, Timothy W. Hardcastle, M.J. Tasse, C. Best, P.N. Röttgering, H.J.A. Williams, W.L. Botteon, A. Drabent, A. Mechev, A. Shulevski, A. van Weeren, R.J. Bester, L. Brüggen, M. Brunetti, G. Callingham, J.R. Chyzy, K.T. Conway, J.E. Dijkema, T.J. Duncan, K. de Gasperin, F. Hale, C.L. Haverkorn, M. Hugo, B. Jackson, N. Mevius, M. Miley, G.K. Morabito, L.K. Morganti, R. Offringa, A. Oonk, J.B.R. Rafferty, D. Sabater, J. Smith, D.J.B. Schwarz, D.J. Smirnov, O. O’Sullivan, S.P. Vedantham, H. White, G.J. Albert, J.G. Alegre, L. Asabere, B. Bacon, D.J. Bonafede, A. Bonnassieux, E. Brienza, M. Bilicki, M. Bonato, M. Calistro Rivera, G. Cassano, R. Cochrane, R. Croston, J.H. Cuciti, V. Dallacasa, D. Danezi, A. Dettmar, R.J. Di Gennaro, G. Edler, H.W. Enßlin, T.A. Emig, K.L. Franzen, T.M.O. García-Vergara, C. Grange, Y.G. Gürkan, G. Hajduk, M. Heald, G. Heesen, V. Hoang, D.N. Hoeft, M. Horellou, C. Iacobelli, M. Jamrozy, M. Jelić, V. Kondapally, R. Kukreti, P. Kunert-Bajraszewska, M. Magliocchetti, M. Mahatma, V. Malek, K. Mandal, S. Massaro, F. Meyer-Zhao, Z. Mingo, B. Mostert, R.I.J. Nair, D.G. Nakoneczny, S.J. Nikiel-Wroczynski, B. Orrú, E. Pajdosz-Smierciak, U. Pasini, T. Prandoni, I. van Piggelen, H.E. Rajpurohit, K. Retana-Montenegro, E. Riseley, C.J. Rowlinson, A. Saxena, A. Schrijvers, C. Sweijen, F. Siewert, T.M. Timmerman, R. Vaccari, M. Vink, J. West, J.L. Wolowska, A. Zhang, X. Zheng, J. ASTRON The Netherlands Institute for Radio Astronomy Oude Hoogeveensedijk 4 Dwingeloo 7991 PD Netherlands Leiden Observatory Leiden University PO Box 9513 LeidenNL-2300 RA Netherlands Centre for Astrophysics Research School of Physics Astronomy and Mathematics University of Hertfordshire College Lane Hatfield AL10 9AB United Kingdom GEPI Observatoire de Paris Université PSL CNRS 5 Place Jules Janssen Meudon 92190 France Department of Physics & Electronics Rhodes University PO Box 94 Grahamstown 6140 South Africa School of Physics and Astronomy Institute for Astronomy University of Edinburgh Royal Observatory Blackford Hill EdinburghEH9 3HJ United Kingdom Thüringer Landessternwarte Sternwarte 5 Tautenburg D-07778 Germany 2 Fir Street Black River Business Park Observatory Cape Town South Africa Hamburger Sternwarte University of Hamburg Gojenbergsweg 112 Hamburg21029 Germany INAF Istituto di Radioastronomia via P. Gobetti 101 Bologna40129 Italy Astronomical Observatory Jagiellonian University ul. Orla 171 Kraków30-244 Poland Department of Space Earth and Environment Chalmers University of Technology Onsala Space Observatory Onsala439 92 Sweden Department of Astrophysics IMAPP Radboud University Nijmegen P.O. Box 9010 Nijmegen6500 GL Netherlands Jodrell Bank Centre for Astrophysics Department of Physics and Astronomy School of Natural Sciences University of Manchester Oxford Road ManchesterM13 9PL United Kingdom Centre for Extragalactic Astronomy Department of Physics Durham University DurhamDH1 3LE United Kingdom Institute for Computational Cosmology Department of Physics Durham University South Road DurhamDH1 3LE United Kingdom Kapteyn Astronomical Institute University of Groningen P.O. Box 800 Groningen9700 AV Netherlands SURF P.O.Box 94613 AmsterdamNL-1090 GP Netherlands Fakultät für Physik Universität Bielefeld Postfach 100131 Bielefeld33501 Germany School of Physical Sciences and Centre for Astrophysics & R

In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44◦30′ and 1h00m +28◦00′ and spanning 4178 and 1457 square degrees respectively. The images were derived from 3,451 hrs (7.6 PB) of LOFAR High Band Antenna data which were corrected for the direction-independent instrumental properties as well as direction-dependent ionospheric distortions during extensive, but fully automated, data processing. A catalogue of 4,396,228 radio sources is derived from our total intensity (Stokes I) maps, where the majority of these have never been detected at radio wavelengths before. At 6″ resolution, our full bandwidth Stokes I continuum maps with a central frequency of 144 MHz have: a median rms sensitivity of 83 µJy/beam;a flux density scale accuracy of approximately 10%;an astrometric accuracy of 0.2″;and we estimate the point-source completeness to be 90% at a peak brightness of 0.8 mJy/beam. By creating three 16 MHz bandwidth images across the band we are able to measure the in-band spectral index of many sources, albeit with an error on the derived spectral index of > ±0.2 which is a consequence of our flux-density scale accuracy and small fractional bandwidth. Our circular polarisation (Stokes V) 20″ resolution 120-168 MHz continuum images have a median rms sensitivity of 95 µJy/beam, and we estimate a Stokes I to Stokes V leakage of 0.056%. Our linear polarisation (Stokes Q and Stokes U) image cubes consist of 480 × 97.6 kHz wide planes and have a median rms sensitivity per plane of 10.8 mJy/beam at 4′ and 2.2 mJy/beam at 20″;we estimate the Stokes I to Stokes Q/U leakage to be approximately 0.2%. Here we characterise and publicly release our Stokes I, Q, U and V images in addition to the calibrated uv-data to facilitate the thorough scientific exploitation of this unique dataset. Copyright © 2022,

关键词： Surveys

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Search for an Invisibly Decaying Z′ Boson at Belle II in e+e−→μ+μ−(e±μ∓) Plus Missing Energy Final States

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Physical Review Letters 2020年第14期124卷 141801-141801页

作者： I. Adachi P. Ahlburg H. Aihara N. Akopov A. Aloisio N. Anh Ky D. M. Asner H. Atmacan T. Aushev V. Aushev T. Aziz V. Babu S. Baehr P. Bambade Sw. Banerjee V. Bansal M. Barrett J. Baudot J. Becker P. K. Behera J. V. Bennett E. Bernieri F. U. Bernlochner M. Bertemes M. Bessner S. Bettarini F. Bianchi D. Biswas A. Bozek M. Bračko P. Branchini R. A. Briere T. E. Browder A. Budano L. Burmistrov S. Bussino M. Campajola L. Cao G. Casarosa C. Cecchi D. Červenkov M.-C. Chang R. Cheaib V. Chekelian Y. Q. Chen Y.-T. Chen B. G. Cheon K. Chilikin K. Cho S. Cho S.-K. Choi S. Choudhury D. Cinabro L. Corona L. M. Cremaldi S. Cunliffe T. Czank F. Dattola E. De La Cruz-Burelo G. De Nardo M. De Nuccio G. De Pietro R. de Sangro M. Destefanis S. Dey A. De Yta-Hernandez F. Di Capua Z. Doležal I. Domínguez Jiménez T. V. Dong K. Dort D. Dossett S. Dubey S. Duell G. Dujany S. Eidelman M. Eliachevitch J. E. Fast T. Ferber D. Ferlewicz G. Finocchiaro S. Fiore A. Fodor F. Forti B. G. Fulsom E. Ganiev M. Garcia-Hernandez R. Garg V. Gaur A. Gaz A. Gellrich J. Gemmler T. Geßler R. Giordano A. Giri B. Gobbo R. Godang P. Goldenzweig B. Golob P. Gomis W. Gradl E. Graziani D. Greenwald Y. Guan C. Hadjivasiliou S. Halder T. Hara O. Hartbrich K. Hayasaka H. Hayashii C. Hearty M. T. Hedges I. Heredia de la Cruz M. Hernández Villanueva A. Hershenhorn T. Higuchi E. C. Hill M. Hoek C.-L. Hsu Y. Hu T. Iijima K. Inami G. Inguglia J. Irakkathil Jabbar A. Ishikawa R. Itoh Y. Iwasaki W. W. Jacobs D. E. Jaffe E.-J. Jang H. B. Jeon S. Jia Y. Jin C. Joo K. K. Joo J. Kahn H. Kakuno A. B. Kaliyar J. Kandra G. Karyan Y. Kato T. Kawasaki B. H. Kim C.-H. Kim D. Y. Kim K.-H. Kim S.-H. Kim Y. K. Kim Y. Kim T. D. Kimmel H. Kindo C. Kleinwort P. Kodyš T. Koga S. Kohani I. Komarov S. Korpar N. Kovalchuk T. M. G. Kraetzschmar P. Križan R. Kroeger P. Krokovny T. Kuhr J. Kumar M. Kumar R. Kumar K. Kumara S. Kurz A. Kuzmin Y.-J. Kwon S. Lacaprara C. La Licata L. Lanceri J. S. Lange K. Lautenbach I.-S. Lee S. C. Lee P. Leitl D. Levit L. K. Li Y. B. Li J. Libby K. Lieret L. Li High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 The Graduate University for Advanced Studies (SOKENDAI) Hayama 240-0193 University of Bonn 53115 Bonn Department of Physics University of Tokyo Tokyo 113-0033 Alikhanyan National Science Laboratory Yerevan 0036 Dipartimento di Scienze Fisiche Università di Napoli Federico II I-80126 Napoli INFN Sezione di Napoli I-80126 Napoli Institute of Physics Hanoi Institute of Theoretical and Applied Research (ITAR) Duy Tan University Hanoi 100000 Vietnam Brookhaven National Laboratory Upton New York 11973 University of Cincinnati Cincinnati Ohio 45221 Moscow Institute of Physics and Technology Moscow Region 141700 Taras Shevchenko National Univ. of Kiev Kiev Tata Institute of Fundamental Research Mumbai 400005 Deutsches Elektronen–Synchrotron 22607 Hamburg Institut für Experimentelle Teilchenphysik Karlsruher Institut für Technologie 76131 Karlsruhe Laboratoire de l’Accélérateur Linéaire IN2P3/CNRS et Université Paris-Sud 11 Centre Scientifique d’Orsay F-91898 Orsay Cedex University of Louisville Louisville Kentucky 40292 Pacific Northwest National Laboratory Richland Washington 99352 Université de Strasbourg CNRS IPHC UMR 7178 67037 Strasbourg Indian Institute of Technology Madras Chennai 600036 University of Mississippi University Mississippi 38677 INFN Sezione di Roma Tre I-00146 Roma Institute of High Energy Physics Vienna 1050 Austria University of Hawaii Honolulu Hawaii 96822 Dipartimento di Fisica Università di Pisa I-56127 Pisa INFN Sezione di Pisa I-56127 Pisa Dipartimento di Fisica Università di Torino I-10125 Torino INFN Sezione di Torino I-10125 Torino H. Niewodniczanski Institute of Nuclear Physics Krakow 31-342 University of Maribor 2000 Maribor J. Stefan Institute 1000 Ljubljana Carnegie Mellon University Pittsburgh Pennsylvania 15213 Dipartimento di Matematica e Fisica Università di Roma Tre I-00146 Roma Dipartimento di Fisica Università di Perugia I-06123 Perugia INFN Sezione di Per

Theories beyond the standard model often predict the existence of an additional neutral boson, the Z′. Using data collected by the Belle II experiment during 2018 at the SuperKEKB collider, we perform the first searches for the invisible decay of a Z′ in the process e+e−→μ+μ−Z′ and of a lepton-flavor-violating Z′ in e+e−→e±μ∓Z′. We do not find any excess of events and set 90% credibility level upper limits on the cross sections of these processes. We translate the former, in the framework of an Lμ−Lτ theory, into upper limits on the Z′ coupling constant at the level of 5×10−2−1 for MZ′≤6 GeV/c2.

关键词： Extensions of gauge sector Invisible decays Particle dark matter Hypothetical gauge bosons Lepton colliders

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Search for CP violation and observation of P violation in Λb0→pπ−π+π− decays

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Physical Review D 2020年第5期102卷 051101(R)-051101(R)页

作者： R. Aaij C. Abellán Beteta T. Ackernley B. Adeva M. Adinolfi H. Afsharnia C. A. Aidala S. Aiola Z. Ajaltouni S. Akar P. Albicocco J. Albrecht F. Alessio M. Alexander A. Alfonso Albero G. Alkhazov P. Alvarez Cartelle A. A. Alves, Jr. S. Amato Y. Amhis L. An L. Anderlini G. Andreassi M. Andreotti F. Archilli J. Arnau Romeu A. Artamonov M. Artuso K. Arzymatov E. Aslanides M. Atzeni B. Audurier S. Bachmann J. J. Back S. Baker V. Balagura W. Baldini A. Baranov R. J. Barlow S. Barsuk W. Barter M. Bartolini F. Baryshnikov G. Bassi V. Batozskaya B. Batsukh A. Battig V. Battista A. Bay M. Becker F. Bedeschi I. Bediaga A. Beiter L. J. Bel V. Belavin S. Belin N. Beliy V. Bellee K. Belous I. Belyaev G. Bencivenni E. Ben-Haim S. Benson S. Beranek A. Berezhnoy R. Bernet D. Berninghoff H. C. Bernstein E. Bertholet A. Bertolin C. Betancourt F. Betti M. O. Bettler Ia. Bezshyiko S. Bhasin J. Bhom M. S. Bieker S. Bifani P. Billoir A. Birnkraut A. Bizzeti M. Bjørn M. P. Blago T. Blake F. Blanc S. Blusk D. Bobulska V. Bocci O. Boente Garcia T. Boettcher A. Boldyrev A. Bondar N. Bondar S. Borghi M. Borisyak M. Borsato J. T. Borsuk T. J. V. Bowcock C. Bozzi S. Braun A. Brea Rodriguez M. Brodski J. Brodzicka A. Brossa Gonzalo D. Brundu E. Buchanan A. Büchler-Germann A. Buonaura C. Burr A. Bursche J. S. Butter J. Buytaert W. Byczynski S. Cadeddu H. Cai R. Calabrese S. Cali R. Calladine M. Calvi M. Calvo Gomez A. Camboni P. Campana D. H. Campora Perez L. Capriotti A. Carbone G. Carboni R. Cardinale A. Cardini P. Carniti K. Carvalho Akiba A. Casais Vidal G. Casse M. Cattaneo G. Cavallero R. Cenci J. Cerasoli M. G. Chapman M. Charles Ph. Charpentier G. Chatzikonstantinidis M. Chefdeville V. Chekalina C. Chen S. Chen A. Chernov S.-G. Chitic V. Chobanova M. Chrzaszcz A. Chubykin P. Ciambrone M. F. Cicala X. Cid Vidal G. Ciezarek F. Cindolo P. E. L. Clarke M. Clemencic H. V. Cliff J. Closier J. L. Cobbledick V. Coco J. A. B. Coelho J. Cogan E. Cogneras L. Cojocariu P. Collins T. Colombo A. Comerma-Montells A. Contu N. Cooke G. Coombs S. Coquere Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Physik-Institut Universität Zürich Zürich Switzerland Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Instituto Galego de Física de Altas Enerxías (IGFAE) Universidade de Santiago de Compostela Santiago de Compostela Spain H.H. Wills Physics Laboratory University of Bristol Bristol United Kingdom Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France University of Michigan Ann Arbor USA (associated with Syracuse University Syracuse New York USA) INFN Sezione di Milano Milano Italy University of Cincinnati Cincinnati Ohio USA INFN Laboratori Nazionali di Frascati Frascati Italy Fakultät Physik Technische Universität Dortmund Dortmund Germany European Organization for Nuclear Research (CERN) Geneva Switzerland School of Physics and Astronomy University of Glasgow Glasgow United Kingdom ICCUB Universitat de Barcelona Barcelona Spain Petersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI) Gatchina Russia Imperial College London London United Kingdom Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Université Paris-Saclay CNRS/IN2P3 IJCLab Orsay France INFN Sezione di Firenze Firenze Italy Institute of Physics Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland INFN Sezione di Ferrara Ferrara Italy Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Aix Marseille Univ CNRS/IN2P3 CPPM Marseille France Institute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI) Protvino Russia Protvino Russia Syracuse University Syracuse New York USA Yandex School of Data Analysis Moscow Russia INFN Sezione di Cagliari Monserrato Italy Department of Physics University of Warwick Coventry United Kingdom Department of Physics and Astronomy University of Manchester Manchester United Kingdom INFN Sezione di Genova Genova Italy National University of Science

A search for CP violation in the Λb0→pπ−π+π− decay is performed using LHCb data corresponding to an integrated luminosity of 6.6 fb−1 collected in pp collisions at center-of-mass energies of 7, 8 and 13 TeV. The analysis uses both triple product asymmetries and the unbinned energy test method. The highest significances of CP asymmetry are 2.9 standard deviations from triple product asymmetries and 3.0 standard deviations for the energy test method. Once the global p-value is considered, all results are consistent with no CP violation. Parity violation is observed at a significance of 5.5 standard deviations for the triple product asymmetry method and 5.3 standard deviations for the energy test method. The reported deviations are given in regions of phase space.

关键词： Particle decays Bottom baryons Bottom quark Hadron colliders Heavy baryons CP symmetry CP violation P-symmetry

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DES Y1 results: Splitting growth and geometry to test ΛCDM

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Physical Review D 2021年第2期103卷 023528-023528页

作者： J. Muir E. Baxter V. Miranda C. Doux A. Ferté C. D. Leonard D. Huterer B. Jain P. Lemos M. Raveri S. Nadathur A. Campos A. Chen S. Dodelson J. Elvin-Poole S. Lee L. F. Secco M. A. Troxel N. Weaverdyck J. Zuntz D. Brout A. Choi M. Crocce T. M. Davis D. Gruen E. Krause C. Lidman N. MacCrann A. Möller J. Prat A. J. Ross M. Sako S. Samuroff C. Sánchez D. Scolnic B. Zhang T. M. C. Abbott M. Aguena S. Allam J. Annis S. Avila D. Bacon E. Bertin S. Bhargava S. L. Bridle D. Brooks D. L. Burke A. Carnero Rosell M. Carrasco Kind J. Carretero R. Cawthon M. Costanzi L. N. da Costa M. E. S. Pereira S. Desai H. T. Diehl J. P. Dietrich P. Doel J. Estrada S. Everett A. E. Evrard I. Ferrero B. Flaugher J. Frieman J. García-Bellido T. Giannantonio R. A. Gruendl J. Gschwend G. Gutierrez S. R. Hinton D. L. Hollowood K. Honscheid B. Hoyle D. J. James T. Jeltema K. Kuehn N. Kuropatkin O. Lahav M. Lima M. A. G. Maia F. Menanteau R. Miquel R. Morgan J. Myles A. Palmese F. Paz-Chinchón A. A. Plazas A. K. Romer A. Roodman E. Sanchez V. Scarpine S. Serrano I. Sevilla-Noarbe M. Smith E. Suchyta M. E. C. Swanson G. Tarle D. Thomas C. To D. L. Tucker T. N. Varga J. Weller R. D. Wilkinson Kavli Institute for Particle Astrophysics & Cosmology Stanford University P.O. Box 2450 Stanford California 94305 USA Institute for Astronomy University of Hawaii 2680 Woodlawn Drive Honolulu Hawaii 96822 USA Department of Astronomy/Steward Observatory University of Arizona 933 North Cherry Avenue Tucson Arizona 85721-0065 USA Department of Physics and Astronomy University of Pennsylvania Philadelphia Pennsylvania 19104 USA Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive Pasadena California 91109 USA School of Mathematics Statistics and Physics Newcastle University Newcastle upon Tyne NE1 7RU United Kingdom Department of Physics University of Michigan Ann Arbor Michigan 48109 USA Department of Physics & Astronomy University College London Gower Street London WC1E 6BT United Kingdom Kavli Institute for Cosmological Physics University of Chicago Chicago Illinois 60637 USA Institute of Cosmology and Gravitation University of Portsmouth Portsmouth PO1 3FX United Kingdom Department of Physics Carnegie Mellon University Pittsburgh Pennsylvania 15312 USA Instituto de Física Teórica Universidade Estadual Paulista São Paulo 01140 Brazil Center for Cosmology and Astro-Particle Physics The Ohio State University Columbus Ohio 43210 USA Department of Physics The Ohio State University Columbus Ohio 43210 USA Department of Physics Duke University Durham North Carolina 27708 USA Institute for Astronomy University of Edinburgh Edinburgh EH9 3HJ United Kingdom Center for Astrophysics Harvard & Smithsonian 60 Garden Street Cambridge Massachusetts 02138 USA Institut d’Estudis Espacials de Catalunya (IEEC) 08034 Barcelona Spain Institute of Space Sciences (ICE CSIC) Campus UAB Carrer de Can Magrans s/n 08193 Barcelona Spain School of Mathematics and Physics University of Queensland Brisbane Queensland 4072 Australia Department of Physics Stanford University 382 Via Pueblo Mall Stanford California 94305 USA SLAC Nat

We analyze Dark Energy Survey (DES) data to constrain a cosmological model where a subset of parameters—focusing on Ωm—are split into versions associated with structure growth (e.g., Ωmgrow) and expansion history (e.g., Ωmgeo). Once the parameters have been specified for the ΛCDM cosmological model, which includes general relativity as a theory of gravity, it uniquely predicts the evolution of both geometry (distances) and the growth of structure over cosmic time. Any inconsistency between measurements of geometry and growth could therefore indicate a breakdown of that model. Our growth-geometry split approach therefore serves both as a (largely) model-independent test for beyond-ΛCDM physics, and as a means to characterize how DES observables provide cosmological information. We analyze the same multiprobe DES data as [Phys. Rev. Lett. 122, 171301 (2019)] : DES Year 1 (Y1) galaxy clustering and weak lensing, which are sensitive to both growth and geometry, as well as Y1 BAO and Y3 supernovae, which probe geometry. We additionally include external geometric information from BOSS DR12 BAO and a compressed Planck 2015 likelihood, and external growth information from BOSS DR12 RSD. We find no significant disagreement with Ωmgrow=Ωmgeo. When DES and external data are analyzed separately, degeneracies with neutrino mass and intrinsic alignments limit our ability to measure Ωmgrow, but combining DES with external data allows us to constrain both growth and geometric quantities. We also consider a parametrization where we split both Ωm and w, but find that even our most constraining data combination is unable to separately constrain Ωmgrow and wgrow. Relative to ΛCDM, splitting growth and geometry weakens bounds on σ8 but does not alter constraints on h.

关键词： Astrophysical studies of gravity Cosmic microwave background Cosmological constant Cosmological parameters Dark energy Evolution of the Universe Large scale structure of the Universe Sky surveys

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Magnetoresistance of semimetals: The case of antimony

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Physical Review Materials 2018年第11期2卷 114201-114201页

作者： Benoît Fauqué Xiaojun Yang Wojciech Tabis Mingsong Shen Zengwei Zhu Cyril Proust Yuki Fuseya Kamran Behnia JEIP USR 3573 CNRS Collège de France PSL Research University 11 place Marcelin Berthelot 75231 Paris Cedex 05 France ESPCI ParisTech PSL Research University CNRS Sorbonne Universités UPMC Univ. Paris 6 LPEM 10 rue Vauquelin F-75231 Paris Cedex 5 France School of Physics and Optoelectronics Xiangtan University Xiangtan 411105 China Laboratoire National des Champs Magnétiques Intenses (LNCMI-EMFL) CNRS UGA UPS INSA Grenoble/Toulouse France AGH University of Science and Technology Faculty of Physics and Applied Computer Science 30-059 Krakow Poland Wuhan National High Magnetic Field Center and School of Physics Huazhong University of Science and Technology Wuhan 430074 China Department of Engineering Science University of Electro-Communications Chofu Tokyo 182-8585 Japan

Large unsaturated magnetoresistance has been recently reported in numerous semimetals. Many of them have a topologically nontrivial band dispersion, such as Weyl nodes or lines. Here, we show that elemental antimony displays the largest high-field magnetoresistance among all known semimetals. We present a detailed study of the angle-dependent magnetoresistance and use a semiclassical framework invoking an anisotropic mobility tensor to fit the data. A slight deviation from perfect compensation and a modest variation with magnetic field of the components of the mobility tensor are required to attain perfect fits at arbitrary strength and orientation of magnetic field in the entire temperature window of study. Our results demonstrate that large orbital magnetoresistance is an unavoidable consequence of low carrier concentration and the subquadratic magnetoresistance seen in many semimetals can be attributed to field-dependent mobility, expected whenever the disorder length scale exceeds the Fermi wavelength.

关键词： Transport phenomena Semimetals Methods in transport Resistivity measurements

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Implementation of Non-Integer Order Filtering for the Purpose of Disparities Detection in Beta Frequencies - A Pilot Study

Implementation of Non-Integer Order Filtering for the Purpos...

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International Conference on Methods and Models in Automation and Robotics

作者： Aleksandra Kawala-Janik Magda Zolubak Waldemar Bauer Bartosz Nazimek Tomasz Sobolewski Radek Martinek Marcin Sowa Mariusz Pelc Faculty of Electrical Engineering Automatic Control and Informatics Opole University of Technology Opole Poland Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering AGH University of Science and Technology Krakow Poland Department of Neurosurgery University Hospital in Opole Opole Poland Faculty of Electrical Engineering Silesian University of Technology Gliwice Poland Department of Cybernetics and Biomedical Engineering VSB-Technical University of Ostrava Ostrava Czech Republic

In this work the authors of the hereof paper describe pilot study on implementation of fractional order filtering applied for the purpose of disparities detection in Beta Frequencies. The Beta waves frequency range can be split into three sections, where the information provided by particular section enables more accurate medical diagnosis. Spectral analysis used in this study allowed appropriate isolation of the Beta waves. Implementation of non-integer order filtering in such study is innovative and provided some promising results.

关键词： Electroencephalography Spectrogram Electronic mail Frequency measurement Transfer functions Electrical engineering Stress

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Potential for biomedical applications of positron annihilation lifetime spectroscopy (PALS)

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AIP Conference Proceedings 2019年第1期2182卷

作者： Ewelina Kubicz for the J-PET collaboration 1Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University S. Łojasiewicza 11 30-348 Kraków Poland

Positron Annihilation Lifetime Spectroscopy (PALS) allows examining structure of materials in nano and sub-nanometer scale. This technique is based on the lifetime and intensity of ortho-positronium atoms in free volumes of given structures. It is mostly used for studies in material sciences, but it can also be used for in vivo imaging of the cell morphology as proposed in [1], [2]. Cancer cells are characterized by an altered macro structure in comparison to normal cells, thus the main objective of these studies is to compare if these differences can be detected on sub-nanometer level with PALS technique. First studies on standard PAL spectrometers conducted by Jean [3],[4] and J-PET collaboration [5], [6], give promising results showing differences between normal and cancer *** perspective will allow for simultaneous determination of early and advanced stages of carcinogenesis, by observing changes in biomechanical parameters between normal and tumour cells, and standard PET examination, which can be performed with the Jagiellonian Positron Emission Tomograph (J-PET), a multi-purpose detector used for investigations with positronium atoms in life-sciences as well as for development of medical diagnostics. Results of first PALS measurement of cardiac myxoma, with J-PET detector is presented in this paper. Obtained o-Ps lifetime for tumor tissue is equal to 2.03(01)[ns] and its intensity 25.7(1)%.

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Measurement of |Vcb| with Bs0 → Ds(∗)−µ+νµ decays

arXiv

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arXiv 2020年

作者： Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C.A. Aiola, S. Ajaltouni, Z. Akar, S. Albicocco, P. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Alkhazov, G. Alvarez Cartelle, P. Alves, A.A. Amato, S. Amhis, Y. An, L. Anderlini, L. Andreassi, G. Andreotti, M. Archilli, F. Arnau Romeu, J. Artamonov, A. Artuso, M. Arzymatov, K. Aslanides, E. Atzeni, M. Audurier, B. Bachmann, S. Back, J.J. Baker, S. Balagura, V. Baldini, W. Baranov, A. Barlow, R.J. Barsuk, S. Barter, W. Bartolini, M. Baryshnikov, F. Bassi, G. Batozskaya, V. Batsukh, B. Battig, A. Bay, A. Becker, M. Bedeschi, F. Bediaga, I. Beiter, A. Bel, L.J. Belavin, V. Belin, S. Beliy, N. Bellee, V. Belous, K. Belyaev, I. Bencivenni, G. Ben-Haim, E. Benson, S. Beranek, S. Berezhnoy, A. Bernet, R. Berninghoff, D. Bernstein, H.C. Bertella, C. Bertholet, E. Bertolin, A. Betancourt, C. Betti, F. Bettler, M.O. Bezshyiko, Ia. Bhasin, S. Bhom, J. Bieker, M.S. Bifani, S. Billoir, P. Bizzeti, A. Bjørn, M. Blago, M.P. Blake, T. Blanc, F. Blusk, S. Bobulska, D. Bocci, V. Boente Garcia, O. Boettcher, T. Boldyrev, A. Bondar, A. Bondar, N. Borghi, S. Borisyak, M. Borsato, M. Borsuk, J.T. Bowcock, T.J.V. Bozzi, C. Bradley, M.J. Braun, S. Brea Rodriguez, A. Brodski, M. Brodzicka, J. Brossa Gonzalo, A. Brundu, D. Buchanan, E. Buonaura, A. Burr, C. Bursche, A. Butter, J.S. Buytaert, J. Byczynski, W. Cadeddu, S. Cai, H. Calabrese, R. Calero Diaz, L. Cali, S. Calladine, R. Calvi, M. Calvo Gomez, M. Camargo Magalhaes, P. Camboni, A. Campana, P. Campora Perez, D.H. Capriotti, L. Carbone, A. Carboni, G. Cardinale, R. Cardini, A. Carniti, P. Carvalho Akiba, K. Casais Vidal, A. Casse, G. Cattaneo, M. Cavallero, G. Celani, S. Cenci, R. Cerasoli, J. Chapman, M.G. Charles, M. Charpentier, Ph. Chatzikonstantinidis, G. Chefdeville, M. Chekalina, V. Chen, C. Chen, S. Chernov, A. Chitic, S.-G. Chobanova, V. Chrzaszcz, M. Chubykin, A. Ciambrone, P. Cicala, M.F. Cid Vidal, X. Rio de Janeiro Brazil Rio de Janeiro Brazil Center for High Energy Physics Tsinghua University Beijing China School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China University of Chinese Academy of Sciences Beijing China Beijing China Institute of Particle Physics Central China Normal University Wuhan Hubei China Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS IN2P3 LAPP Annecy France Université Clermont Auvergne CNRS IN2P3 LPC Clermont-Ferrand France Aix Marseille Univ CNRS IN2P3 CPPM Marseille France LAL Univ. Paris-Sud CNRS IN2P3 Université Paris-Saclay Orsay France LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité CNRS IN2P3 Paris France I. Physikalisches Institut RWTH Aachen University Aachen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Heidelberg Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany School of Physics University College Dublin Dublin Ireland INFN Sezione di Bari Bari Italy INFN Sezione di Bologna Bologna Italy INFN Sezione di Ferrara Ferrara Italy INFN Sezione di Firenze Firenze Italy INFN Laboratori Nazionali di Frascati Frascati Italy INFN Sezione di Genova Genova Italy INFN Sezione di Milano-Bicocca Milano Italy INFN Sezione di Milano Milano Italy INFN Sezione di Cagliari Monserrato Italy INFN Sezione di Padova Padova Italy INFN Sezione di Pisa Pisa Italy INFN Sezione di Roma Tor Vergata Roma Italy INFN Sezione di Roma La Sapienza Roma Italy Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Nikhef National Institute for Subatomic Physics VU University Amsterdam Amsterdam Netherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Kraków Poland AGH - University of Science and Technology Faculty of Physics and Applied Computer Science Kraków Poland Warsaw Poland Horia Hulubei National Institute of Physics and Nuclear

The element |Vcb| of the Cabibbo-Kobayashi-Maskawa matrix is measured using semileptonic Bs0 decays produced in proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb−1. Rates of Bs0 → Ds−µ+νµ and Bs0 → Ds∗−µ+νµ decays are analyzed using hadronic form-factor parametrizations derived either by Caprini, Lellouch and Neubert (CLN) or by Boyd, Grinstein and Lebed (BGL). The measured values of |Vcb| are (41.4 ± 0.6 ± 0.9 ± 1.2) × 10−3 and (42.3 ± 0.8 ± 0.9 ± 1.2) × 10−3 in the CLN and BGL parametrization, respectively. The first uncertainty is statistical, the second systematic, and the third is due to the external inputs used in the measurement. These results are in agreement with those obtained from decays of B+ and B0 mesons. They are the first determinations of |Vcb| at a hadron-collider experiment and the first using Bs0 meson decays. Copyright © 2020, The Authors. All rights reserved.

关键词： Hadrons

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