Measurement of the CKM angle γ using the B± → D∗h± channels

LHCb collaboration; R.H. O'Neil; K. Farmer; A. Bohare; M. Richardson-Slipper; C. Vrahas

doi:10.1007/JHEP12(2023)013

Measurement of the CKM angle γ using the B± → D∗h± channels

LHCb collaboration, R.H. O'Neil, K. Farmer, A. Bohare, M. Richardson-Slipper, C. Vrahas

School of Physics and Astronomy

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

Abstract

A measurement of the CP-violating observables from B± → D∗K± and B± →D∗π± decays is presented, where D∗(D) is an admixture of D∗0 and ¯D∗0 (D0 and ¯D0) states and is reconstructed through the decay chains D∗ → Dπ0/γ and D → K0S π+π−/K0S K+K−.
The measurement is performed by analysing the signal yield variation across the D decay
phase space and is independent of any amplitude model. The data sample used was col-
lected by the LHCb experiment in proton-proton collisions and corresponds to a total
integrated luminosity of 9 fb−1 at centre-of-mass energies of 7, 8 and 13 TeV. The CKM
angle γ is determined to be (69+13−14)◦ using the measured CP-violating observables. The
hadronic parameters rD∗K±B , rD∗π±B , δD∗K±B , δD∗π±B , which are the ratios and strong phase differences between favoured and suppressed B± decays, are also reported.

Original language	English
Article number	13
Pages (from-to)	1-31
Number of pages	31
Journal	Journal of High Energy Physics
Volume	2023
Issue number	12
DOIs	https://doi.org/10.1007/JHEP12(2023)013
Publication status	Published - 1 Dec 2023

Keywords / Materials (for Non-textual outputs)

B Physics
CKM Angle Gamma
CP Violation
Hadron-Hadron Scattering

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10.1007/JHEP12(2023)013Licence: Creative Commons: Attribution (CC-BY)

http://arxiv.org/abs/2310.04277

3 Finished
4 Active

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 = "Measurement of the CKM angle γ using the B± → D∗h± channels",

abstract = "A measurement of the CP-violating observables from B± → D∗K± and B± →D∗π± decays is presented, where D∗(D) is an admixture of D∗0 and ¯D∗0 (D0 and ¯D0) states and is reconstructed through the decay chains D∗ → Dπ0/γ and D → K0S π+π−/K0S K+K−.The measurement is performed by analysing the signal yield variation across the D decayphase space and is independent of any amplitude model. The data sample used was col-lected by the LHCb experiment in proton-proton collisions and corresponds to a totalintegrated luminosity of 9 fb−1 at centre-of-mass energies of 7, 8 and 13 TeV. The CKMangle γ is determined to be (69+13−14)◦ using the measured CP-violating observables. Thehadronic parameters rD∗K±B , rD∗π±B , δD∗K±B , δD∗π±B , which are the ratios and strong phase differences between favoured and suppressed B± decays, are also reported.",

keywords = "B Physics, CKM Angle Gamma, CP Violation, Hadron-Hadron Scattering",

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 Ozlem Ozcelik and Gediminas Sarpis and R.H. O'Neil and K. Farmer and A. Bohare and M. Richardson-Slipper and C. Vrahas",

year = "2023",

month = dec,

day = "1",

doi = "10.1007/JHEP12(2023)013",

language = "English",

volume = "2023",

pages = "1--31",

journal = " Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer",

number = "12",

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TY - JOUR

T1 - Measurement of the CKM angle γ using the B± → D∗h± channels

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 - Ozcelik, Ozlem

AU - Sarpis, Gediminas

AU - O'Neil, R.H.

AU - Farmer, K.

AU - Bohare, A.

AU - Richardson-Slipper, M.

AU - Vrahas, C.

PY - 2023/12/1

Y1 - 2023/12/1

N2 - A measurement of the CP-violating observables from B± → D∗K± and B± →D∗π± decays is presented, where D∗(D) is an admixture of D∗0 and ¯D∗0 (D0 and ¯D0) states and is reconstructed through the decay chains D∗ → Dπ0/γ and D → K0S π+π−/K0S K+K−.The measurement is performed by analysing the signal yield variation across the D decayphase space and is independent of any amplitude model. The data sample used was col-lected by the LHCb experiment in proton-proton collisions and corresponds to a totalintegrated luminosity of 9 fb−1 at centre-of-mass energies of 7, 8 and 13 TeV. The CKMangle γ is determined to be (69+13−14)◦ using the measured CP-violating observables. Thehadronic parameters rD∗K±B , rD∗π±B , δD∗K±B , δD∗π±B , which are the ratios and strong phase differences between favoured and suppressed B± decays, are also reported.

AB - A measurement of the CP-violating observables from B± → D∗K± and B± →D∗π± decays is presented, where D∗(D) is an admixture of D∗0 and ¯D∗0 (D0 and ¯D0) states and is reconstructed through the decay chains D∗ → Dπ0/γ and D → K0S π+π−/K0S K+K−.The measurement is performed by analysing the signal yield variation across the D decayphase space and is independent of any amplitude model. The data sample used was col-lected by the LHCb experiment in proton-proton collisions and corresponds to a totalintegrated luminosity of 9 fb−1 at centre-of-mass energies of 7, 8 and 13 TeV. The CKMangle γ is determined to be (69+13−14)◦ using the measured CP-violating observables. Thehadronic parameters rD∗K±B , rD∗π±B , δD∗K±B , δD∗π±B , which are the ratios and strong phase differences between favoured and suppressed B± decays, are also reported.

KW - B Physics

KW - CKM Angle Gamma

KW - CP Violation

KW - Hadron-Hadron Scattering

U2 - 10.1007/JHEP12(2023)013

DO - 10.1007/JHEP12(2023)013

M3 - Article

SN - 1029-8479

VL - 2023

SP - 1

EP - 31

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 12

M1 - 13

ER -

Measurement of the CKM angle γ using the B± → D∗h± channels

Abstract

Keywords / Materials (for Non-textual outputs)

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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