Test of lepton universality with Lambda(0)(b) -> pK(-) l(+)l(-)

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作者信息关键词期刊信息基础信息归属信息摘要

成果类型：

期刊论文

作者：

Aaij, R.;Beteta, C. Abellan;Ackernley, T.;Adeva, B.;Adinol, M.;...

通讯作者：

Lisovskyi, V

作者机构：

[Ketel, T.; Mulder, M.; Tuning, N.; Hynds, D.; Perez, D. H. Campora; Hart, R.; Heijho, K.; Kuindersma, H. S.; de Vries, J. A.; Veronesi, M.; Aaij, R.; Snoch, A.; Greim, R.; van Beuzekom, M.; Martinez, M. Lucio; Kostiuk, I; Jans, E.; Bel, L. J.; Esen, S.; Pellegrino, A.; Vitkovskiy, A.; Merk, M.; Onderwater, C. J. G.; van Veghel, M.; Butter, J. S.; Koppenburg, P.; Akiba, K. Carvalho; Gras, C. Sanchez; Raven, G.; Sole, S. Ferreres; Sierra, C. Vazquez; Govorkova, E.; Schubiger, M.; Benson, S.; Hulsbergen, W.] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands.

[Cruz Torres, M.; De Miranda, J. M.; Soares Lavra, L.; Gomes, A.; Torres Machado, D.; Erri, A. Massa; dos Reis, A. C.; Bediaga, I] Ctr Brasileiro Pesquisas Fis CBPF, Rio De Janeiro, Brazil.

[Lopes, J. H.; Polycarpo, E.; Souza De Paula, B.; Gandelman, M.; Gobel, C.; Rangel, M. S.; Hicheur, A.; Nasteva, I; Sellam, S.; Otalora Goicochea, J. M.; Rodrigues, F. Ferreira; Silva de Oliveira, L.; De Paula, L.; Amato, S.] Univ Fed Rio de Janeiro UFRJ, Rio De Janeiro, Brazil.

[Yang, Z.; Cai, H.; Jiang, F.; Fan, J.; Liu, G.; Ren, Z.; Xu, L.; Tang, Z.; Li, H.; Wang, J.; Wang, M.; Zhang, W. C.; Gu, C.; Sun, J.; Xing, H.; Chen, C.; Zhu, X.; Sun, L.; Luo, Y.; Mu, H.; Zeng, M.; Zhang, L.; Gan, Y.; Liu, X.] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China.

[Gao, Y.; Zhang, S.; Xu, A.; Xu, Z.] Peking Univ, State Key Lab Nucl Phys & Technol, Sch Phys, Beijing, Peoples R China.

通讯机构：

[Lisovskyi, V] T

Tech Univ Dortmund, Fak Phys, Dortmund, Germany.

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：

2020

卷：

2020

期：

页码：

1-27

DOI：

10.1007/JHEP05(2020)040

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; 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); NWO (Netherlands)Netherlands Organization for Scientific Research (NWO)Netherlands Government; MNiSW (Poland)Ministry of Science and Higher Education, Poland; NCN (Poland); MEN/IFA (Romania); MSHE (Russia); MinECo (Spain); SNSF (Switzerland)Swiss National Science Foundation (SNSF); SER (Switzerland); NASU (Ukraine); STFC (United Kingdom)Science & Technology Facilities Council (STFC); DOE NP (U.S.A.)United States Department of Energy (DOE); NSF (U.S.A.)National Science Foundation (NSF); ERC (European Union)European Union (EU)European Research Council (ERC); ANR, Labex P2IO (France)French National Research Agency (ANR); ANR, Labex OCEVU (France)French National Research Agency (ANR); Region Auvergne-Rhone-Alpes (France)Region Auvergne-Rhone-Alpes; Key Research Program of Frontier Sciences of CAS (China); CAS PIFI (China); Thousand Talents Program (China); RFBR (Russia)Russian Foundation for Basic Research (RFBR); RSF (Russia)Russian Science Foundation (RSF); Yandex LLC (Russia); GVA (Spain); XuntaGal (Spain); GENCAT (Spain); Royal Society (United Kingdom)Royal Society of London; Leverhulme Trust (United Kingdom)Leverhulme Trust

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 ratio of branching fractions of the decays $$ {\Lambda}_b^0 $$ → pK−e+e− and $$ {\Lambda}_b^0 $$ → pK−μ+μ−, $$ {R}_{pK}^{-1} $$ , is measured for the first time using proton-proton collision data corresponding to an integrated luminosity of 4.7 fb−1 recorded with the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV. In the dilepton mass-squared range 0.1 < q2 < 6.0 GeV2/c4 and the pK− mass range m(pK−) < 2600 MeV/c2, the ratio of branching fractions is measured to be $$ {R}_{pK}^{-1}={1.17}_{-0.16}^{+0.18}\...

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Test of lepton universality with Lambda(0)(b) -> pK(-) l(+)l(-)

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