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First Observation of the Radiative Decay Λb0 → Λγ

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成果类型:
期刊论文
作者:
Aaij, R.*;Beteta, C. Abelln;Adeva, B.;Adinolfi, M.;Aidala, C. A.;...
通讯作者:
Aaij, R.
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.; Kostiuk, I; Jans, E.; Bel, L. J.; Esen, S.; Dall'Occo, E.; Pellegrino, A.; Vitkovskiy, A.; Merk, M.; Onderwater, C. J. G.; Archilli, F.; van Veghel, M.; Butter, J. S.; Koppenburg, P.; Gras, C. Sanchez; Sierra, C. Vzquez; Raven, G.; Sole, S. Ferreres; Govorkova, E.; 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, I; Gomes, A.; dos Reis, A. C.; Bediaga, I] CBPF, Rio De Janeiro, Brazil.
[Lopes, J. H.; Polycarpo, E.; Souza De Paula, B.; Gandelman, M.; Rangel, M. S.; Ferreira Rodrigues, F.; Hicheur, A.; Nasteva, I; Otalora Goicochea, J. M.; Carvalho Akiba, K.; Silva de Oliveira, L.; De Paula, L.; Amato, S.] Univ Fed Rio de Janeiro, Rio De Janeiro, Brazil.
[Gao, Y.; Yang, Z.; Cai, H.; Jiang, F.; Dey, B.; Yu, J.; Yin, H.; Xu, A.; Liu, G.; Wang, Y.; Xu, M.; Ren, Z.; Tang, Z.; Xiao, D.; Li, H.; Xu, Z.; Wang, M.; Hu, W.; Zhang, W. C.; Gu, C.; Sun, J.; Xing, H.; Han, Q.; Chen, C.; Zhu, X.; Sun, L.; Luo, Y.; Zhang, D.; Xie, Y.; Mukherjee, M.; Zeng, M.; Zhang, L.; Gan, Y.; Liu, X.] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China.
[Beliy, N.; Li, P-R; Lyu, X.; Szymanski, M.; Xu, Q.; Huang, W.; He, J.; Saur, M.; Qian, W.; Qin, J.; Zheng, Y.; Vieira, D.] Univ Chinese Acad Sci, Beijing, Peoples R China.
通讯机构:
[Aaij, R.] N
Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands.
语种:
英文
期刊:
PHYSICAL REVIEW LETTERS
ISSN:
0031-9007
年:
2019
卷:
123
期:
3
基金类别:
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); MPG (Germany)Max Planck Society; NWO (Netherlands)Netherlands Organization for Scientific Research (NWO)Netherlands Government; MNiSW (Poland)Ministry of Science and Higher Education, Poland; NCN (Poland); MEN/IFA (Romania); MinECo (Spain); SNSF (Switzerland)Swiss National Science Foundation (SNSF); SER (Switzerland); NASU (Ukraine); NSF (USA)National Science Foundation (NSF); AvH Foundation (Germany)Alexander von Humboldt Foundation; EPLANET, Marie Sklodowska-Curie Actions; ERC (European Union)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; GENCAT (Spain); Royal SocietyRoyal Society of LondonEuropean Commission; Leverhulme Trust (United Kingdom)Leverhulme Trust; Laboratory Directed Research and Development program of LANL (USA); DFG (Germany)German Research Foundation (DFG); INFN (Italy)Istituto Nazionale di Fisica Nucleare (INFN); MSHE (Russia); STFC (United Kingdom)UK Research & Innovation (UKRI)Science & Technology Facilities Council (STFC); Science and Technology Facilities CouncilUK Research & Innovation (UKRI)Science & Technology Facilities Council (STFC) [ST/N000242/1, ST/N000331/1] 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:
The radiative decay Λb0→Λγ is observed for the first time using a data sample of proton-proton collisions corresponding to an integrated luminosity of 1.7 fb-1 collected by the LHCb experiment at a center-of-mass energy of 13 TeV. Its branching fraction is measured exploiting the B0→K∗0γ decay as a normalization mode and is found to be B(Λb0→Λγ)=(7.1±1.5±0.6±0.7)×10-6, where the quoted uncertainties are statistical, systematic, and systematic from external inputs, respectively. This is the first observation of a radiative d...

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