Simultaneous determination of CKM angle γ and charm mixing parameters

LHCb collaboration; R.H. O'Neil

doi:10.1007/JHEP12(2021)141

Simultaneous determination of CKM angle γ and charm mixing parameters

LHCb collaboration
, R.H. O'Neil

School of Physics and Astronomy

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

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 ¯D0 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 +0.052−0.053)%
and y = (0.630 +0.033−0.030)%. The angle γ is found to be γ = (65.4 +3.8
−4.2)◦ and is the most precise determination from a single experiment.

Original language	English
Article number	141
Pages (from-to)	1-31
Number of pages	31
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

Keywords / Materials (for Non-textual outputs)

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

Access to Document

10.1007/JHEP12(2021)141Licence: Creative Commons: Attribution (CC-BY)

http://arxiv.org/abs/2110.02350

Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/04/23 → 30/09/25
Project: Research
Next generation photodetectors for future applications
Oliva, F. (Principal Investigator)
1/12/22 → 30/11/25
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/10/22 → 30/09/25
Project: Research

Cite this

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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 ¯D0 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 +0.052−0.053)\% and y = (0.630 +0.033−0.030)\%. The angle γ is found to be γ = (65.4 +3.8 −4.2)◦ 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 William Barter and P.E.L. Clarke and S. Gambetta and F. Muheim and M. Needham and Mark Williams and Federico Betti and Robert Currie and S. Eisenhardt and Lavra, \{Lais Soares\} and Oliva Federica and Gediminas Sarpis and R.H. O'Neil",

year = "2021",

month = dec,

day = "21",

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

language = "English",

volume = "2021",

pages = "1--31",

journal = " Journal of High Energy Physics",

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TY - JOUR

T1 - Simultaneous determination of CKM angle γ and charm mixing parameters

AU - LHCb collaboration

AU - Barter, William

AU - Clarke, P.E.L.

AU - Gambetta, S.

AU - Muheim, F.

AU - Needham, M.

AU - Williams, Mark

AU - Betti, Federico

AU - Currie, Robert

AU - Eisenhardt, S.

AU - Lavra, Lais Soares

AU - Federica, Oliva

AU - Sarpis, Gediminas

AU - O'Neil, R.H.

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 ¯D0 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 +0.052−0.053)% and y = (0.630 +0.033−0.030)%. The angle γ is found to be γ = (65.4 +3.8 −4.2)◦ 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 ¯D0 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 +0.052−0.053)% and y = (0.630 +0.033−0.030)%. The angle γ is found to be γ = (65.4 +3.8 −4.2)◦ 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)

U2 - 10.1007/JHEP12(2021)141

DO - 10.1007/JHEP12(2021)141

M3 - Article

SN - 1029-8479

VL - 2021

SP - 1

EP - 31

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

Keywords / Materials (for Non-textual outputs)

Access to Document

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Projects

Experimental Particle Physics at the University of Edinburgh

Next generation photodetectors for future applications

Experimental Particle Physics at the University of Edinburgh

Cite this