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

Department of Physics

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

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.].

Original language	English (US)
Article number	108
Journal	Journal of High Energy Physics
Volume	2017
Issue number	6
DOIs	https://doi.org/10.1007/JHEP06(2017)108
State	Published - Jun 1 2017

Keywords

B physics
CP violation
FCNC Interaction
Hadron-Hadron scattering (experiments)

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1007/JHEP06(2017)108

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Cite this

@article{f0ba0d9912db4fa9991225ec48c9a904,

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 S. Blusk and Rudolph, {M. S.} and T. Skwarnicki and S. Stone",

year = "2017",

month = jun,

day = "1",

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

language = "English (US)",

volume = "2017",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

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TY - JOUR

T1 - Observation of the decay Λb 0 → pK − μ + μ − and a search for CP violation

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 - Blusk, S.

AU - Rudolph, M. S.

AU - Skwarnicki, T.

AU - Stone, S.

PY - 2017/6/1

Y1 - 2017/6/1

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)

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U2 - 10.1007/JHEP06(2017)108

DO - 10.1007/JHEP06(2017)108

M3 - Article

AN - SCOPUS:85021447249

VL - 2017

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1126-6708

IS - 6

M1 - 108

ER -