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Evidence for the Rare Decay Σ+ →pμ+μ-(Open Access)

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成果类型:
期刊论文
作者:
Aaij, R.*;Adeva, B.;Adinolfi, M.;Ajaltouni, Z.;Akar, S.;...
通讯作者:
Aaij, R.
作者机构:
[Di Canto, A.; Durante, P.; Ferro-Luzzi, M.; Bozzi, C.; Fontana, M.; Tuning, N.; Kvaratskheliya, T.; Ponce, S.; Karacson, M.; Merli, A.; Byczynski, W.; Hatch, M.; Forty, R.; Corti, G.; McCann, M.; Schmidt, B.; Gaspar, C.; Voneki, B.; De Aguiar Francisco, O.; Roiser, S.; Seyfert, P.; Wyllie, K.; Dordei, F.; Lacarrere, D.; Leflat, A.; Cattaneo, M.; Jost, B.; Hasse, C.; Farber, C.; Vazquez Gomez, R.; Rihl, M.; Campora Perez, D. H.; Bettler, M. O.; Lindner, R.; Dijkstra, H.; Chitic, S. -G.; Vidal, A. Romero; Thomas, E.; Funk, W.; Palutan, M.; Belyaev, I.; Lemaitre, F.; Collins, P.; Jacobsson, R.; Neufeld, N.; Buytaert, J.; Ciezarek, G.; Frei, C.; Mueller, D.; Aaij, R.; Mathe, Z.; Stagni, F.; Pearce, A.; Teubert, F.; Lupton, O.; Perazzini, S.; Gys, T.; Frank, M.; De Bruyn, K.; Clemencic, M.; Borghi, S.; Pisani, F.; Valassi, A.; Alessio, F.; Pepe Altarelli, M.; Popov, D.; Matev, R.; Joram, C.; Barschel, C.; Charpentier, Ph.; Ruf, T.; Neri, N.; Whitehead, M.; Stahl, S.; Gruber, L.; Schopper, A.; Van Herwijnen, E.; Couturier, B.; Cavallero, G.; Wilson, F. F.; Maev, O.; Granado Cardoso, L. A.; Haen, C.; Dziurda, A.; Johnson, D.; Dorigo, M.; Ravonel Salzgeber, M.; Fernandez Declara, P.; Passaleva, G.; Schwemmer, R.; Vagnoni, V.; D'Ambrosio, C.; Crocombe, A.; Closier, J.; Viana Barbosa, J. V.; Coombs, G.; Valat, S.; Coco, V.; Colombo, T.] European Org Nucl Res CERN, Geneva, Switzerland.
[Massafferri, A.; Cruz Torres, M.; De Miranda, J. M.; Simone, S.; Soares Lavra, L.; Aaij, R.; Molina Rodriguez, J.; Bediaga, I.; Aoude, R. Tourinho Jadallah; Pastore, A.; dos Reis, A. C.] CBPF, Rio De Janeiro, Brazil.
[Lopes, J. H.; Polycarpo, E.; Souza De Paula, B.; Gandelman, M.; Rangel, M. S.; Bertolin, A.; Ferreira Rodrigues, F.; Hicheur, A.; Otalora Goicochea, J. M.; Carvalho Akiba, K.; Potterat, C.; Silva de Oliveira, L.; De Paula, L.; Nasteva, I.; Da Cunha Marinho, F.; Amato, S.] Univ Fed Rio de Janeiro, Rio de Janeiro, Brazil.
[Gao, Y.; Yang, Z.; Jiang, F.; Li, T.; Xu, Z.; Sun, J.; Zhu, X.; An, L.; Davis, A.; Zhang, L.; Liu, X.] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China.
[Chefdeville, M.; Decamp, D.; Reboud, M.; Beaucourt, L.; T'Jampens, S.; Marchand, J. F.; Xu, Z.; Ghez, Ph.; Tournefier, E.; Pietrzyk, B.; Minard, M. -N.] Univ Savoie Mont Blanc, Univ Grenoble Alpes, CNRS, IN2P3,LAPP, Annecy, France.
通讯机构:
[Aaij, R.] C
CBPF, Rio De Janeiro, Brazil.
语种:
英文
期刊:
PHYSICAL REVIEW LETTERS
ISSN:
0031-9007
年:
2018
卷:
120
期:
22
页码:
221803
基金类别:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Conselho Nacional de Desenvolvimento Científico e Tecnológico Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro Financiadora de Estudos e Projetos Ministry of Science and Technology of China (MOST) People’s Republic of China National Natural Science Foundation of China Centre National de la Recherche Scientifique Bundesministerium für Bildung und Forschung Deutsche Forschungsgemeinschaft Max-Planck-Gesellschaft Instituto Nazionale di Fisica Nucleare (INFN) Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) Ministerstwo Nauki i Szkolnictwa Wyzszego (MNiSW) Narodowe Centrum Nauki (NCN) Ministry of Education and Science of the Russian Federation Federal Agency for Science and Innovation Ministerio de Economía y Competitividad Swiss National Science Foundation State Secretariat for Education, Research and Innovation National Academy of Sciences of Ukraine Science and Technology Facilities Council National Science Foundation Deutsches Elektronen-Synchrotron (DESY) Alexander von Humboldt Foundation Marie Skłodowska-Curie Actions European Research Council ANR. Agence Nationale de la Recherche Russian Foundation for Basic Research Russian Science Foundation Consellería de Cultura, Educación e Ordenación Universitaria, Xunta de Galicia Generalitat de Catalunya The Royal Society English-Speaking Union Leverhulme Trust Ministerul Educatiei si Cercetarii Stiintifice Karlsruher Institut für Technologie Helmholtz-Gemeinschaft Institute National de Physique Nucleaire et de Physique des Particules (CNRS/IN2P3) (Republic of France) SURF, Collaborative organisation for ICT in Dutch higher education and research (Kingdom of the Netherlands) PIC, Port d’Informacio Cientifica (Kingdom of Spain) GridPP, UK Computing for Particle Physics (United Kingdom of Great Britain and Northern Ireland) National Research Center “Kurchatov” Institute (Russian Federation) Yandex LLC (Russian Federation) CSCS (Switzerland) IFIN-HH (Romania) CBPF (Federative Republic of Brazil) PL-GRID (Republic of Poland) Labex P2IO, Physique des 2 Infinis et des Origines (Republic of France) Labex OCEVU, Origine Constituants et Evolution de l’Univers (Republic of France) Région Auvergne-Rhône-Alpes (Republic of France) Herchel Smith Fund (United Kingdom of Great Britain and Northern Ireland) CERN, The European Organization for Nuclear Research (Switzerland) Institul de Fizica Atomica (MEN/IFA) (Romania) Ohio Supercomputer Center (OSC) (United States) EPLANET, The European Particle physics Latin America NETwork (European Union) Conseil Général de Haute-Savoie (Republic of France)
机构署名:
本校为其他机构
院系归属:
物理科学与技术学院
心理学院
摘要:
A search for the rare decay Σ+→pμ+μ- is performed using pp collision data recorded by the LHCb experiment at center-of-mass energies s=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb-1. An excess of events is observed with respect to the background expectation, with a signal significance of 4.1 standard deviations. No significant structure is observed in the dimuon invariant mass distribution, in contrast with a previous result from the HyperCP experiment. The measured Σ+→pμ+μ- branching fraction is (2.2-1.3+1.8)×10-8, where statistical an...

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