Observation of the decay Λb        0 → pK − μ + μ − and a search for CP violation

The LHCb collaboration

doi:10.1007/JHEP06(2017)108

Observation of the decay Λ_b ⁰ → pK ⁻ μ ⁺ μ ⁻ and a search for CP violation

The LHCb collaboration

European Organization for Nuclear Research
University Santiago de Compostela
University of Bristol
Clermont-Auvergne University
University of Cincinnati
Fakultät Physik
University of Dortmund
SUPA
University of Glasgow
Science Park 105
Petersburg Nuclear Physics Institute (PNPI)
Imperial College London
Instituto de Biofisica da UFRJ
INFN
Laboratoire de l'Accélérateur Linéaire
Center for High Energy Physics
Tsinghua University
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
Institute of Physics
ENAC-IIC-GEL
Sezione INFN di Ferrara
University of Ferrara
University of Maryland, College Park
School of Physics and Astronomy
University of Manchester
University of Heidelberg
Aix-Marseille Université
Kurchatov Institute
Syracuse University
Sezione di Roma
Department of Physics
University of Warwick
University of Barcelona
Pontifícia Universidade Católica do Rio de Janeiro
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Institute for Theoretical and Experimental Physics
Institute for Nuclear Physics
University of Science and Technology
Agh University of Science and Technology Faculty of Computer Science
National Centre for Nuclear Research (NCBJ)
Université Savoie Mont Blanc

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

30 Citations (Scopus)

Résumé

A search for CP violation in the decay Λ_b ⁰ → pK⁻μ⁺μ⁻ is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and is potentially sensitive to new sources of CP violation. The study is based on a data sample of proton-proton collisions recorded with the LHCb experiment, corresponding to an integrated luminosity of 3 fb⁻¹. The Λ_b ⁰ → pK⁻μ⁺μ⁻ decay is observed for the first time, and two observables that are sensitive to different manifestations of CP violation are measured, (Formula Presented.)where the latter is based on asymmetries in the angle between the μ⁺μ⁻ and pK⁻ decay planes. These are measured to be(Formula Presented.)and no evidence for CP violation is found.[Figure not available: see fulltext.].

langue originale	Anglais
Numéro d'article	108
journal	Journal of High Energy Physics
Volume	2017
Numéro de publication	6
Les DOIs	https://doi.org/10.1007/JHEP06(2017)108
état	Publié - 1 juin 2017

Accès au document

10.1007/JHEP06(2017)108

Contient cette citation

@article{06cd9ab64e454f09816fd3e16b8913f1,

title = "Observation of the decay Λb 0 → pK − μ + μ − and a search for CP violation",

abstract = "A search for CP violation in the decay Λb 0 → pK−μ+μ− is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and is potentially sensitive to new sources of CP violation. The study is based on a data sample of proton-proton collisions recorded with the LHCb experiment, corresponding to an integrated luminosity of 3 fb−1. The Λb 0 → pK−μ+μ− decay is observed for the first time, and two observables that are sensitive to different manifestations of CP violation are measured, (Formula Presented.)where the latter is based on asymmetries in the angle between the μ+μ− and pK− decay planes. These are measured to be(Formula Presented.)and no evidence for CP violation is found.[Figure not available: see fulltext.].",

keywords = "B physics, CP violation, FCNC Interaction, Hadron-Hadron scattering (experiments)",

author = "\{The LHCb collaboration\} and R. Aaij and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and \{Alvarez Cartelle\}, P. and Alves, \{A. A.\} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, \{J. E.\} and Appleby, \{R. B.\} and F. Archilli and P. d{\textquoteright}Argent and \{Arnau Romeu\}, J. and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and I. Babuschkin and S. Bachmann and Back, \{J. J.\} and A. Badalov and C. Baesso and S. Baker and V. Balagura and W. Baldini and Barlow, \{R. J.\} and C. Barschel and S. Barsuk and W. Barter and F. Baryshnikov and M. Baszczyk and V. Batozskaya and B. Batsukh and V. Battista and A. Bay and L. Beaucourt and F. Fleuret and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2017, The Author(s).",

year = "2017",

month = jun,

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doi = "10.1007/JHEP06(2017)108",

language = "English",

volume = "2017",

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AU - The LHCb collaboration

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Ali, S.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Archilli, F.

AU - d’Argent, P.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Babuschkin, I.

AU - Bachmann, S.

AU - Back, J. J.

AU - Badalov, A.

AU - Baesso, C.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Baryshnikov, F.

AU - Baszczyk, M.

AU - Batozskaya, V.

AU - Batsukh, B.

AU - Battista, V.

AU - Bay, A.

AU - Beaucourt, L.

AU - Fleuret, F.

AU - Maurice, E.

PY - 2017/6/1

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N2 - A search for CP violation in the decay Λb 0 → pK−μ+μ− is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and is potentially sensitive to new sources of CP violation. The study is based on a data sample of proton-proton collisions recorded with the LHCb experiment, corresponding to an integrated luminosity of 3 fb−1. The Λb 0 → pK−μ+μ− decay is observed for the first time, and two observables that are sensitive to different manifestations of CP violation are measured, (Formula Presented.)where the latter is based on asymmetries in the angle between the μ+μ− and pK− decay planes. These are measured to be(Formula Presented.)and no evidence for CP violation is found.[Figure not available: see fulltext.].

AB - A search for CP violation in the decay Λb 0 → pK−μ+μ− is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and is potentially sensitive to new sources of CP violation. The study is based on a data sample of proton-proton collisions recorded with the LHCb experiment, corresponding to an integrated luminosity of 3 fb−1. The Λb 0 → pK−μ+μ− decay is observed for the first time, and two observables that are sensitive to different manifestations of CP violation are measured, (Formula Presented.)where the latter is based on asymmetries in the angle between the μ+μ− and pK− decay planes. These are measured to be(Formula Presented.)and no evidence for CP violation is found.[Figure not available: see fulltext.].

KW - B physics

KW - CP violation

KW - FCNC Interaction

KW - Hadron-Hadron scattering (experiments)

U2 - 10.1007/JHEP06(2017)108

DO - 10.1007/JHEP06(2017)108

M3 - Article

AN - SCOPUS:85021447249

SN - 1126-6708

VL - 2017

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 6

M1 - 108

ER -

Observation of the decay Λb 0 → pK − μ + μ − and a search for CP violation

Résumé

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Contient cette citation

Observation of the decay Λ_b ⁰ → pK ⁻ μ ⁺ μ ⁻ and a search for CP violation