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Observation of the Lambda(0)(b) -> chi(c1) (3872)pK(-) decay

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成果类型:
期刊论文
作者:
Aaij, R.;Beteta, C. Abellan;Adeva, B.;Adinolfi, M.;Aidala, C. A.;...
通讯作者:
Belyaev, I.
作者机构:
[Ketel, T.; Mulder, M.; Tuning, N.; Hynds, D.; van Tilburg, J.; de Vries, J. A.; Veronesi, M.; Aaij, R.; Greim, R.; van Beuzekom, M.; Dufour, L.; Jans, E.; Bel, L. J.; Esen, S.; Dall'Occo, E.; Pellegrino, A.; Vitkovskiy, A.; Merk, M.; Archilli, F.; van Veghel, M.; Koppenburg, P.; Gras, C. Sanchez; Raven, G.; Sierra, C. Vazquez; Govorkova, E.; Kostiuk, I.; Benson, S.; Hulsbergen, W.] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands.
[Tourinho Jadallah Aoude, R.; Massafferri, A.; Cruz Torres, M.; De Miranda, J. M.; Soares Lavra, L.; Gomes, A.; Bediaga, I.; dos Reis, A. C.] CBPF, Rio De Janeiro, Brazil.
[Lopes, J. H.; Polycarpo, E.; Souza De Paula, B.; Gandelman, M.; Rangel, M. S.; Ferreira Rodrigues, F.; Otalora Goicochea, J. M.; Carvalho Akiba, K.; Silva de Oliveira, L.; De Paula, L.; Nasteva, I.; Da Cunha Marinho, F.; Amato, S.] Univ Fed Rio De Janeiro UFRJ, Rio De Janeiro, Brazil.
[Gao, Y.; Yang, Z.; Jiang, F.; Xu, A.; Ren, Z.; Tang, Z.; Xu, Z.; Wang, M.; Zhang, W. C.; Gu, C.; Sun, J.; Chen, C.; Zhu, X.; Davis, A.; Zhang, L.; Gan, Y.; Liu, X.] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China.
[Li, Y.; Zhang, Y.; Wang, J.] Ihep, Beijing, Peoples R China.
通讯机构:
[Belyaev, I.] I
ITEP, NRC KI, Moscow, Russia.
语种:
英文
关键词:
B physics;Branching fraction;Exotics;Hadron-Hadron scattering (experiments)
期刊:
Journal of High Energy Physics
ISSN:
1029-8479
年:
2019
卷:
2019
期:
9
页码:
1-20
基金类别:
CAPESCAPES; CNPqNational Council for Scientific and Technological Development (CNPq); FAPERJCarlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ); FINEP (Brazil)Ciencia Tecnologia e Inovacao (FINEP); MOST; NSFC(China)National Natural Science Foundation of China (NSFC); CNRS/IN2P3 (France)Centre National de la Recherche Scientifique (CNRS); BMBF, DFGGerman Research Foundation (DFG)Federal Ministry of Education & Research (BMBF); MPG(Germany)Max Planck Society; NWONetherlands Organization for Scientific Research (NWO); MNiSWMinistry of Science and Higher Education, Poland; NCN(Poland); MEN/IFA(Romania); MinECo (Spain); SNSFSwiss National Science Foundation (SNSF); SER (Switzerland); NASU(Ukraine); NSFNational Science Foundation (NSF); DESY(Germany); INFN (Italy)Istituto Nazionale di Fisica Nucleare (INFN); PIC (Spain); GridPP (United Kingdom); Yandex LLC (Russia); CSCS (Switzerland); IFIN-HH (Romania), CBPF(Brazil); PL-GRID (Poland); OSC(U.S.A.); AvH Foundation (Germany)Alexander von Humboldt Foundation; EPLANET, Marie Sklodowska-Curie Actions; ERC(European Union)European Union (EU)European Research Council (ERC); ANR, Labex P2IO and OCEVUFrench National Research Agency (ANR); Region Auvergne-Rhone-Alpes (France)Region Auvergne-Rhone-Alpes; Key Research Program of Frontier Sciences of CAS, CAS PIFI; Thousand Talents Program (China); RFBRRussian Foundation for Basic Research (RFBR); RSFRussian Science Foundation (RSF); Yandex LLC(Russia); GVA; XuntaGal and GENCAT(Spain); Royal SocietyRoyal Society of London; Leverhulme Trust (United Kingdom)Leverhulme Trust; Science and Technology Facilities CouncilScience & Technology Facilities Council (STFC) [ST/N000331/1, ST/N000242/1] 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:
Using proton-proton collision data, collected with the LHCb detector and corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at the centre-of-mass energies of 7, 8, and 13 TeV, respectively, the decay $$ {\Lambda}_{\mathrm{b}}^0\to {\upchi}_{\mathrm{c}1} $$ (3872)pK− with χc1(3872) → J/ψ π+π− is observed for the first time. The significance of the observed signal is in excess of seven standard deviations. It is found that (58 ± 15)% of the decays proceed via the two-body intermediate state χc1(3872)Λ(1520). The...

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