Measurement of the ratio of branching fractions of the decays Λb0 → ψ(2S)Λ and Λb0 → J/ψΛ

被引：0

作者：

R. Aaij

B. Adeva

M. Adinolfi

Z. Ajaltouni

S. Akar

J. Albrecht

F. Alessio

M. Alexander

A. Alfonso Albero

S. Ali

G. Alkhazov

P. Alvarez Cartelle

A. A. Alves

S. Amato

S. Amerio

Y. Amhis

L. An

L. Anderlini

G. Andreassi

M. Andreotti

J. E. Andrews

R. B. Appleby

F. Archilli

J. Arnau Romeu

A. Artamonov

M. Artuso

E. Aslanides

M. Atzeni

G. Auriemma

M. Baalouch

I. Babuschkin

S. Bachmann

J. J. Back

A. Badalov

C. Baesso

S. Baker

V. Balagura

W. Baldini

A. Baranov

R. J. Barlow

C. Barschel

S. Barsuk

W. Barter

F. Baryshnikov

V. Batozskaya

V. Battista

A. Bay

L. Beaucourt

J. Beddow

F. Bedeschi

机构：

[1] Centro Brasileiro de Pesquisas Fìsicas (CBPF),Center for High Energy Physics

[2] Universidade Federal do Rio de Janeiro (UFRJ),I. Physikalisches Institut

[3] Tsinghua University,Fakultät Physik

[4] Univ. Grenoble Alpes,School of Physics

[5] Univ. Savoie Mont Blanc,Institute of Nuclear Physics

[6] CNRS,Instituto Galego de Física de Altas Enerxías (IGFAE)

[7] IN2P3-LAPP,Physik

[8] Université Clermont Auvergne,Institut

[9] CNRS/IN2P3,H.H. Wills Physics Laboratory

[10] LPC,Cavendish Laboratory

[11] Aix Marseille Univ,Department of Physics

[12] CNRS/IN2P3,School of Physics and Astronomy

[13] CPPM,School of Physics and Astronomy

[14] LAL,Oliver Lodge Laboratory

[15] Univ. Paris-Sud,School of Physics and Astronomy

[16] CNRS/IN2P3,Department of Physics

[17] Université Paris-Saclay,School of Physics and Technology

[18] LPNHE,Institute of Particle Physics

[19] Sorbonne Université,Departamento de Fisica

[20] Paris Diderot Sorbonne Paris Cité,Institut für Physik

[21] CNRS/IN2P3,Van Swinderen Institute

[22] RWTH Aachen University,Instituto de Fisica Corpuscular

[23] Technische Universität Dortmund,P.N. Lebedev Physical Institute

[24] Max-Planck-Institut für Kernphysik (MPIK),Physics and Micro Electronic College

[25] Physikalisches Institut,undefined

[26] Ruprecht-Karls-Universität Heidelberg,undefined

[27] University College Dublin,undefined

[28] INFN Sezione di Bari,undefined

[29] INFN Sezione di Bologna,undefined

[30] INFN Sezione di Ferrara,undefined

[31] INFN Sezione di Firenze,undefined

[32] INFN Laboratori Nazionali di Frascati,undefined

[33] INFN Sezione di Genova,undefined

[34] INFN Sezione di Milano-Bicocca,undefined

[35] INFN Sezione di Milano,undefined

[36] INFN Sezione di Cagliari,undefined

[37] INFN Sezione di Padova,undefined

[38] INFN Sezione di Pisa,undefined

[39] INFN Sezione di Roma Tor Vergata,undefined

[40] INFN Sezione di Roma La Sapienza,undefined

[41] Nikhef National Institute for Subatomic Physics,undefined

[42] Nikhef National Institute for Subatomic Physics and VU University Amsterdam,undefined

[43] Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences,undefined

[44] AGH — University of Science and Technology,undefined

[45] Faculty of Physics and Applied Computer Science,undefined

[46] National Center for Nuclear Research (NCBJ),undefined

[47] Horia Hulubei National Institute of Physics and Nuclear Engineering,undefined

[48] Petersburg Nuclear Physics Institute (PNPI),undefined

[49] Institute of Theoretical and Experimental Physics (ITEP),undefined

[50] Moscow State University (SINP MSU),undefined

来源：

Journal of High Energy Physics | / 2019卷

关键词：

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

D O I：

暂无

中图分类号：

学科分类号：

摘要：

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 fractions ℬΛb0→ψ2SΛ/ℬΛb0→J/ψΛ=0.513±0.023stat±0.016syst±0.011ℬ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \mathrm{\mathcal{B}}\left({\Lambda}_b^0\to \psi (2S)\Lambda \right)/\mathrm{\mathcal{B}}\left({\Lambda}_b^0\to J/\psi \Lambda \right)=0.513\pm 0.023\left(\mathrm{stat}\right)\pm 0.016\left(\mathrm{syst}\right)\pm 0.011\left(\mathrm{\mathcal{B}}\right) $$\end{document} is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used. [graphic not available: see fulltext]

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