Measurement of the ratio of branching fractions of the decays Λ                         
                        b
                                                 
                        0
                                                  → ψ(2S)Λ and Λ                         
                        b
                                                 
                        0
                                                  → J/ψΛ

The Lhcb Collaboration

doi:10.1007/JHEP03(2019)126

Measurement of the ratio of branching fractions of the decays Λ _b ⁰ → ψ(2S)Λ and Λ _b ⁰ → J/ψΛ

The Lhcb Collaboration

(Astro)-Particles Physics

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

Using pp collisions corresponding to 3 fb ⁻¹ integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV, the ratio of branching fractionsℬ(Λb0→ψ(2S)Λ)/ℬ(Λb0→J/ψΛ)=0.513±0.023(stat)±0.016(syst)±0.011(ℬ)is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used.[Figure not available: see fulltext.]

Original language	English
Article number	126
Pages (from-to)	1-16
Number of pages	16
Journal	Journal of High Energy Physics
Volume	2019
Issue number	3
Early online date	22 Mar 2019
DOIs	https://doi.org/10.1007/JHEP03(2019)126
Publication status	Published - Mar 2019

Funding

We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); MOST and NSFC (China); CNRS/IN2P3 (France); BMBF, DFG and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MSHE (Russia); MinECo (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); NSF (U.S.A.). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (United Kingdom), RRCKI and Yandex LLC (Russia), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), PL-GRID (Poland) and OSC (U.S.A.). We are indebted to the communities behind the multiple open-source software packages on which we depend. Individual groups or members have received support from AvH Foundation (Germany); EPLANET, Marie Sklo dowska-Curie Actions and ERC (European Union); ANR, Labex P2IO and OCEVU, and Région Auvergne-Rhône-Alpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, and the Thousand Talents Program (China); RFBR, RSF and Yandex LLC (Russia); GVA, XuntaGal and GENCAT (Spain); the Royal Society and the Leverhulme Trust (United Kingdom); Laboratory Directed Research and Development program of LANL (U.S.A.). 11 Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany 12 Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany 13 School of Physics, University College Dublin, Dublin, Ireland 14 INFN Sezione di Bari, Bari, Italy 15 INFN Sezione di Bologna, Bologna, Italy 16 INFN Sezione di Ferrara, Ferrara, Italy 17 INFN Sezione di Firenze, Firenze, Italy 18 INFN Laboratori Nazionali di Frascati, Frascati, Italy 19 INFN Sezione di Genova, Genova, Italy 20 INFN Sezione di Milano-Bicocca, Milano, Italy 21 INFN Sezione di Milano, Milano, Italy 22 INFN Sezione di Cagliari, Monserrato, Italy 23 INFN Sezione di Padova, Padova, Italy 24 INFN Sezione di Pisa, Pisa, Italy 25 INFN Sezione di Roma Tor Vergata, Roma, Italy 26 INFN Sezione di Roma La Sapienza, Roma, Italy 27 Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands 28 Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands 29 Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland 30 AGH — University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland 31 National Center for Nuclear Research (NCBJ), Warsaw, Poland 32 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania 33 Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia 34 Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia 35 Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia 36 Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), Moscow, Russia 37 Yandex School of Data Analysis, Moscow, Russia 38 Budker Institute of Nuclear Physics (SB RAS), Novosibirsk, Russia 39 Institute for High Energy Physics (IHEP), Protvino, Russia 40 ICCUB, Universitat de Barcelona, Barcelona, Spain 41 Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain 42 European Organization for Nuclear Research (CERN), Geneva, Switzerland 43 Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland 44 Physik-Institut, Universität Zürich, Zürich, Switzerland 45 NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine 46 Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine 47 University of Birmingham, Birmingham, United Kingdom 48 H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom 49 Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom 50 Department of Physics, University of Warwick, Coventry, United Kingdom 51 STFC Rutherford Appleton Laboratory, Didcot, United Kingdom 52 School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom 53 School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom 54 Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom 55 Imperial College London, London, United Kingdom 56 School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom 57 Department of Physics, University of Oxford, Oxford, United Kingdom 58 Massachusetts Institute of Technology, Cambridge, MA, United States 59 University of Cincinnati, Cincinnati, OH, United States 60 University of Maryland, College Park, MD, United States 61 Syracuse University, Syracuse, NY, United States 62 Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil, associated to 2 63 University of Chinese Academy of Sciences, Beijing, China, associated to 64 School of Physics and Technology, Wuhan University, Wuhan, China, associated to 65 Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China, associated to 3 66 Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia, associated to 67 Institut für Physik, Universität Rostock, Rostock, Germany, associated to 12 68 Van Swinderen Institute, University of Groningen, Groningen, Netherlands, associated to 69 National Research Centre Kurchatov Institute, Moscow, Russia, associated to 34 70 National University of Science and Technology “MISIS”, Moscow, Russia, associated to 71 National Research Tomsk Polytechnic University, Tomsk, Russia, associated to 34 72 Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia — CSIC, Valencia, Spain, associated to 40 73 Los Alamos National Laboratory (LANL), Los Alamos, United States, associated to

Funders	Funder number
Not added	ST/J004332/1, ST/N000250/1, ST/K003410/1, ST/N000331/1, ST/L003163/1, ST/N000242/1
AvH Foundation
CNRS/IN2P3
Key Research Program of Frontier Sciences of CAS
MSHE
Marie Sklo dowska-Curie Actions
OCEVU
XuntaGal
Yandex LLC
National Science Foundation
Laboratory Directed Research and Development
Los Alamos National Laboratory
School of Energy Resources, University of Wyoming
CERN
College of Arts and Sciences, University of Nebraska-Lincoln
Science and Technology Facilities Council	1796908
Leverhulme Trust
Royal Society
European Research Council
Deutsche Forschungsgemeinschaft
Agence Nationale de la Recherche
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	166208
National Natural Science Foundation of China
Russian Foundation for Basic Research
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Bundesministerium für Bildung und Forschung
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Generalitat Valenciana
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Ministry of Science and Technology
Instituto Nazionale di Fisica Nucleare
Narodowe Centrum Nauki
Ministerstwo Nauki i Szkolnictwa Wyższego
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
National Academy of Sciences of Ukraine
Financiadora de Estudos e Projetos
Russian Science Foundation
Région Auvergne-Rhône-Alpes
Recruitment Program of Global Experts

Keywords

B physics
Branching fraction
Flavor physics
Hadron-Hadron scattering (experiments)

Access to Document

10.1007/JHEP03(2019)126

Persistent URL (handle)

Persistent link

Cite this

The Lhcb Collaboration (2019). Measurement of the ratio of branching fractions of the decays Λ _b ⁰ → ψ(2S)Λ and Λ _b ⁰ → J/ψΛ. Journal of High Energy Physics, 2019(3), 1-16. Article 126. https://doi.org/10.1007/JHEP03(2019)126

The Lhcb Collaboration. / Measurement of the ratio of branching fractions of the decays Λ _b ⁰ → ψ(2S)Λ and Λ _b ⁰ → J/ψΛ. In: Journal of High Energy Physics. 2019 ; Vol. 2019, No. 3. pp. 1-16.

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title = "Measurement of the ratio of branching fractions of the decays Λ b 0 → ψ(2S)Λ and Λ b 0 → J/ψΛ",

abstract = " Using pp collisions corresponding to 3 fb −1 integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV, the ratio of branching fractionsℬ(Λb0→ψ(2S)Λ)/ℬ(Λb0→J/ψΛ)=0.513±0.023(stat)±0.016(syst)±0.011(ℬ)is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used.[Figure not available: see fulltext.] ",

keywords = "B physics, Branching fraction, Flavor physics, Hadron-Hadron scattering (experiments)",

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Whitehead and J. Wicht and G. Wilkinson and M. Wilkinson and M. Williams and Williams, {M. R.J.} and T. Williams and Wilson, {F. F.} and J. Wimberley and M. Winn and J. Wishahi and W. Wislicki and M. Witek and G. Wormser and Wotton, {S. A.} and K. Wyllie and Y. Xie and M. Xu and Q. Xu and Z. Xu and Z. Xu and Z. Yang and Z. Yang and Y. Yao and H. Yin and J. Yu and X. Yuan and O. Yushchenko and Zarebski, {K. A.} and M. Zavertyaev and L. Zhang and Y. Zhang and A. Zhelezov and Y. Zheng and X. Zhu and V. Zhukov and Zonneveld, {J. B.} and S. Zucchelli and {The Lhcb Collaboration}",

year = "2019",

month = mar,

doi = "10.1007/JHEP03(2019)126",

language = "English",

volume = "2019",

pages = "1--16",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer Verlag",

number = "3",

}

The Lhcb Collaboration 2019, 'Measurement of the ratio of branching fractions of the decays Λ _b ⁰ → ψ(2S)Λ and Λ _b ⁰ → J/ψΛ', Journal of High Energy Physics, vol. 2019, no. 3, 126, pp. 1-16. https://doi.org/10.1007/JHEP03(2019)126

Measurement of the ratio of branching fractions of the decays Λ _b ⁰ → ψ(2S)Λ and Λ _b ⁰ → J/ψΛ. / The Lhcb Collaboration.
In: Journal of High Energy Physics, Vol. 2019, No. 3, 126, 03.2019, p. 1-16.

Research output: Contribution to Journal › Article › Academic › peer-review

TY - JOUR

T1 - Measurement of the ratio of branching fractions of the decays Λ b 0 → ψ(2S)Λ and Λ b 0 → J/ψΛ

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AU - Zhu, X.

AU - Zhukov, V.

AU - Zonneveld, J. B.

AU - Zucchelli, S.

AU - The Lhcb Collaboration

PY - 2019/3

Y1 - 2019/3

N2 - Using pp collisions corresponding to 3 fb −1 integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV, the ratio of branching fractionsℬ(Λb0→ψ(2S)Λ)/ℬ(Λb0→J/ψΛ)=0.513±0.023(stat)±0.016(syst)±0.011(ℬ)is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used.[Figure not available: see fulltext.]

AB - Using pp collisions corresponding to 3 fb −1 integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV, the ratio of branching fractionsℬ(Λb0→ψ(2S)Λ)/ℬ(Λb0→J/ψΛ)=0.513±0.023(stat)±0.016(syst)±0.011(ℬ)is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used.[Figure not available: see fulltext.]

KW - B physics

KW - Branching fraction

KW - Flavor physics

KW - Hadron-Hadron scattering (experiments)

UR - http://www.scopus.com/inward/record.url?scp=85063460325&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063460325&partnerID=8YFLogxK

U2 - 10.1007/JHEP03(2019)126

DO - 10.1007/JHEP03(2019)126

M3 - Article

AN - SCOPUS:85063460325

SN - 1126-6708

VL - 2019

SP - 1

EP - 16

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 3

M1 - 126

ER -

The Lhcb Collaboration. Measurement of the ratio of branching fractions of the decays Λ _b ⁰ → ψ(2S)Λ and Λ _b ⁰ → J/ψΛ. Journal of High Energy Physics. 2019 Mar;2019(3):1-16. 126. Epub 2019 Mar 22. doi: 10.1007/JHEP03(2019)126