Simultaneous determination of CKM angle γ and charm mixing parameters

LHCb Collaboration

doi:10.1007/JHEP12(2021)141

Simultaneous determination of CKM angle γ and charm mixing parameters

LHCb Collaboration

Physics and Astronomy

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Abstract

A combination of measurements sensitive to the CP violation angle γ of the Cabibbo-Kobayashi-Maskawa unitarity triangle and to the charm mixing parameters that describe oscillations between D⁰ and D̅ ⁰ mesons is performed. Results from the charm and beauty sectors, based on data collected with the LHCb detector at CERN’s Large Hadron Collider, are combined for the first time. This method provides an improvement on the precision of the charm mixing parameter y by a factor of two with respect to the current world average. The charm mixing parameters are determined to be x=(0.400_−0.053^+0.052)% and y = (0.630_−0.030^+0.033)%. The angle γ is found to be γ = (65.4_−4.2^+3.8)° and is the most precise determination from a single experiment.

Original language	English
Article number	141
Number of pages	32
Journal	Journal of High Energy Physics
Volume	2021
Issue number	12
DOIs	https://doi.org/10.1007/JHEP12(2021)141
Publication status	Published - 21 Dec 2021

Bibliographical note

Publisher Copyright:
© 2021, The Author(s).

Keywords

B physics
Charm physics
CKM angle gamma
CP violation
Hadron-Hadron scattering (experiments)

ASJC Scopus subject areas

Nuclear and High Energy Physics

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@article{31087220d98143549921d898fd2dd0df,

title = "Simultaneous determination of CKM angle γ and charm mixing parameters",

abstract = "A combination of measurements sensitive to the CP violation angle γ of the Cabibbo-Kobayashi-Maskawa unitarity triangle and to the charm mixing parameters that describe oscillations between D0 and D̅ 0 mesons is performed. Results from the charm and beauty sectors, based on data collected with the LHCb detector at CERN{\textquoteright}s Large Hadron Collider, are combined for the first time. This method provides an improvement on the precision of the charm mixing parameter y by a factor of two with respect to the current world average. The charm mixing parameters are determined to be x=(0.400−0.053+0.052)% and y = (0.630−0.030+0.033)%. The angle γ is found to be γ = (65.4−4.2+3.8)° and is the most precise determination from a single experiment.",

keywords = "B physics, Charm physics, CKM angle gamma, CP violation, Hadron-Hadron scattering (experiments)",

author = "{LHCb Collaboration} and R. Aaij and Abdelmotteleb, {A. S.W.} and {Abell{\'a}n Beteta}, C. and F. Abudin{\'e}n and T. Ackernley and B. Adeva and M. Adinolfi and H. Afsharnia and C. Agapopoulou and Aidala, {C. A.} and S. Aiola and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. and Z. Aliouche and G. Alkhazov and {Alvarez Cartelle}, P. and S. Amato and Amey, {J. L.} and Y. Amhis and L. An and L. Anderlini and A. Andreianov and M. Andreotti and F. Archilli and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and M. Bachmayer and Back, {J. J.} and S. Bifani and R. Calladine and G. Chatzikonstantinidis and N. Cooke and V. Duk and P. Ilten and J. Plews and D. Popov and A. Sergi and Slater, {M. W.} and Swallow, {P. N.} and Thompson, {D. J.D.} and Watson, {N. K.}",

note = "Publisher Copyright: {\textcopyright} 2021, The Author(s).",

year = "2021",

month = dec,

day = "21",

doi = "10.1007/JHEP12(2021)141",

language = "English",

volume = "2021",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

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AU - LHCb Collaboration

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellán Beteta, C.

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Afsharnia, H.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Aiola, S.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Aliouche, Z.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Amato, S.

AU - Amey, J. L.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreianov, A.

AU - Andreotti, M.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Back, J. J.

AU - Bifani, S.

AU - Calladine, R.

AU - Chatzikonstantinidis, G.

AU - Cooke, N.

AU - Duk, V.

AU - Ilten, P.

AU - Plews, J.

AU - Popov, D.

AU - Sergi, A.

AU - Slater, M. W.

AU - Swallow, P. N.

AU - Thompson, D. J.D.

AU - Watson, N. K.

PY - 2021/12/21

Y1 - 2021/12/21

N2 - A combination of measurements sensitive to the CP violation angle γ of the Cabibbo-Kobayashi-Maskawa unitarity triangle and to the charm mixing parameters that describe oscillations between D0 and D̅ 0 mesons is performed. Results from the charm and beauty sectors, based on data collected with the LHCb detector at CERN’s Large Hadron Collider, are combined for the first time. This method provides an improvement on the precision of the charm mixing parameter y by a factor of two with respect to the current world average. The charm mixing parameters are determined to be x=(0.400−0.053+0.052)% and y = (0.630−0.030+0.033)%. The angle γ is found to be γ = (65.4−4.2+3.8)° and is the most precise determination from a single experiment.

AB - A combination of measurements sensitive to the CP violation angle γ of the Cabibbo-Kobayashi-Maskawa unitarity triangle and to the charm mixing parameters that describe oscillations between D0 and D̅ 0 mesons is performed. Results from the charm and beauty sectors, based on data collected with the LHCb detector at CERN’s Large Hadron Collider, are combined for the first time. This method provides an improvement on the precision of the charm mixing parameter y by a factor of two with respect to the current world average. The charm mixing parameters are determined to be x=(0.400−0.053+0.052)% and y = (0.630−0.030+0.033)%. The angle γ is found to be γ = (65.4−4.2+3.8)° and is the most precise determination from a single experiment.

KW - B physics

KW - Charm physics

KW - CKM angle gamma

KW - CP violation

KW - Hadron-Hadron scattering (experiments)

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U2 - 10.1007/JHEP12(2021)141

DO - 10.1007/JHEP12(2021)141

M3 - Article

AN - SCOPUS:85121829307

SN - 1126-6708

VL - 2021

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 12

M1 - 141

ER -

Simultaneous determination of CKM angle γ and charm mixing parameters

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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