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Observation of the suppressed decay Lambda(0)(b) -> p pi(-) mu(+) mu(-)

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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.; Kvaratskheliya, T.; Faerber, C.; Karacson, M.; Hatch, M.; Ferrari, F.; Forty, R.; Corti, G.; Schmidt, B.; Gaspar, C.; Perez, D. H. Campora; Voneki, B.; Otto, A.; Roiser, S.; Barter, W.; Wyllie, K.; Dordei, F.; Contu, A.; Lacarrere, D.; Leflat, A.; Cattaneo, M.; Jost, B.; Dungs, K.; Rihl, M.; Siddi, B. G.; Lindner, R.; Dijkstra, H.; Thomas, E.; Funk, W.; Golutvin, A.; Lemaitre, F.; Collins, P.; Jacobsson, R.; Neufeld, N.; Buytaert, J.; Frei, C.; Aaij, R.; Mathe, Z.; Grillo, L.; Stagni, F.; Teubert, F.; Bondar, N.; Perazzini, S.; Gys, T.; Cogoni, V.; Wilkinson, G.; Robbe, P.; Frank, M.; Panman, J.; Clemencic, M.; Williams, M.; Valassi, A.; Alessio, F.; Trisovic, A.; Fohl, K.; Popov, D.; Matev, R.; Cardoso, L. A. Granado; Joram, C.; Altarelli, M. Pepe; Barschel, C.; Charpentier, Ph.; Ruf, T.; Poikela, T.; Whitehead, M.; Stahl, S.; Bettler, M. -O.; Linn, C.; Schopper, A.; Couturier, B.; Dettori, F.; Tonelli, D.; Prisciandaro, J.; Schindler, H.; Haen, C.; Dziurda, A.; Johnson, D.; Schwemmer, R.; Vagnoni, V.; D'Ambrosio, C.; Closier, J.; van Herwijnen, E.; Coombs, G.; Valat, S.; Sridharan, S.] European Org Nucl Res, CERN, Geneva, Switzerland.
[De Miranda, J. M.; Soares Lavra, L.; Salustino Guimaraes, V.; Gomes, A.; Molina Rodriguez, J.; Bediaga, I.; Rodrigues, A. B.; dos Reis, A. C.; Massaferri, A.; Vieira, D.] CBPF, Rio De Janeiro, Brazil.
[Lopes, J. H.; Martins Tostes, D.; Polycarpo, E.; De Aguiar Francisco, O.; Souza De Paula, B.; Gandelman, M.; Rangel, M. S.; Ferreira Rodrigues, F.; Hicheur, A.; Otalora Goicochea, J. M.; Carvalho Akiba, K.; Potterat, C.; Bursche, A.; 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.; Zhu, X.; Davis, A.; Zhang, L.; Liu, X.] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China.
[Chefdeville, M.; Decamp, D.; Beaucourt, L.; T'Jampens, S.; Marchand, J. F.; Tisserand, V.; Ghez, Ph.; Tournefier, E.; Pietrzyk, B.; Minard, M. -N.; Deleage, N.] Univ Savoie Mont Blanc, CNRS, IN2P3, LAPP, Annecy Le Vieux, France.
通讯机构:
[Aaij, R.] E
European Org Nucl Res, CERN, Geneva, Switzerland.
语种:
英文
关键词:
B physics;Branching fraction;Flavour Changing Neutral Currents;Hadron-Hadron scattering (experiments);Rare decay
期刊:
Journal of High Energy Physics
ISSN:
1029-8479
年:
2017
卷:
2017
期:
4
页码:
1-16
基金类别:
CERN; CAPES (Brazil)CAPES; CNPq (Brazil)National Council for Scientific and Technological Development (CNPq); FAPERJ (Brazil)Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ); FINEP (Brazil)Ciencia Tecnologia e Inovacao (FINEP); MOST (China)Ministry of Science and Technology, China; NSFC (China)National Natural Science Foundation of China (NSFC); CNRS/IN2P3 (France)Centre National de la Recherche Scientifique (CNRS); BMBF (Germany)Federal Ministry of Education & Research (BMBF); DFG (Germany)German Research Foundation (DFG); MPG (Germany)Max Planck Society; INFN (Italy)Istituto Nazionale di Fisica Nucleare (INFN); FOM (The Netherlands)FOM (The Netherlands)Netherlands Government; NWO (The Netherlands)Netherlands Organization for Scientific Research (NWO)Netherlands Government; MNiSW (Poland)Ministry of Science and Higher Education, Poland; NCN (Poland); MEN/IFA (Romania); MinES (Russia); FASO (Russia); MinECo (Spain); SNSF (Switzerland)Swiss National Science Foundation (SNSF); SER (Switzerland); NASU (Ukraine); STFC (United Kingdom)UK Research & Innovation (UKRI)Science & Technology Facilities Council (STFC); NSF (U.S.A.)National Science Foundation (NSF); AvH Foundation (Germany)Alexander von Humboldt Foundation; EPLANET (European Union); Marie Sklodowska-Curie Actions (European Union); ERC (European Union)European Research Council (ERC); Conseil General de Haute-Savoie (France)Region Auvergne-Rhone-Alpes; Labex ENIGMASS (France); OCEVU, Region Auvergne (France)Region Auvergne-Rhone-Alpes; RFBR (Russia)Russian Foundation for Basic Research (RFBR); Yandex LLC (Russia); GVA (Spain); XuntaGal (Spain); GENCAT (Spain); Herchel Smith Fund (United Kingdom); Royal Society (United Kingdom)Royal Society of London; Royal Commission (United Kingdom); Leverhulme Trust (United Kingdom)Leverhulme Trust; Science and Technology Facilities CouncilUK Research & Innovation (UKRI)Science & Technology Facilities Council (STFC) [ST/J004332/1, 1416165, ST/N000234/1, 1565116, 1681016, LHCb, 1641747, LHCb Upgrades, 1707993, ST/N000250/1, ST/M003140/1, ST/K003410/1, 1514623, GRIDPP, ST/H006737/1, ST/G005974/1, 1369397, ST/N000331/1, ST/L001152/1, ST/K001361/1, 1708182] Funding Source: researchfish
机构署名:
本校为其他机构
院系归属:
物理科学与技术学院
摘要:
The suppressed decay Λ 0  → pπ − μ + μ −, excluding the J/ψ and ψ(2S) → μ + μ − resonances, is observed for the first time with a significance of 5.5 standard deviations. The analysis is performed with proton-proton collision data corresponding to an integrated luminosity of 3 fb−1 collected with the LHCb experiment. The Λ 0  → pπ − μ + μ − branching fraction is measured relative to the Λ 0  → J/ψ(→μ + μ −)pπ − branching fraction giving $$ \frac{\mathrm{\m...

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