Measurement of the CKM angle γ in B± → DK± and B± → Dπ± decays with D → KS0 h+ h−

LHCb Collaboration

doi:10.1007/JHEP02(2021)169

Measurement of the CKM angle γ in B^± → DK^± and B^± → Dπ^± decays with D → K_S⁰ h⁺ h⁻

LHCb Collaboration

Physics and Astronomy

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

2 Citations (Scopus)

109 Downloads (Pure)

Abstract

A measurement of CP-violating observables is performed using the decays B^± → DK^± and B^± → Dπ^±, where the D meson is reconstructed in one of the self-conjugate three-body final states K_S⁰π⁺π⁻ and K_S⁰K⁺K⁻ (commonly denoted K_S⁰h⁺h⁻). The decays are analysed in bins of the D-decay phase space, leading to a measurement that is independent of the modelling of the D-decay amplitude. The observables are inter- preted in terms of the CKM angle γ. Using a data sample corresponding to an integrated luminosity of 9 fb⁻¹ collected in proton-proton collisions at centre-of mass energies of 7, 8, and 13 TeV with the LHCb experiment, γ is measured to be (68.7_−5.1^+5.2)°. The hadronic parameters r_B^DK, r_B^Dπ, δ_B^DK, and δ_B^Dπ, which are the ratios and strong-phase differences of the suppressed and favoured B^± decays, are also reported.

Original language	English
Article number	169
Number of pages	36
Journal	Journal of High Energy Physics
Volume	2021
Issue number	2
DOIs	https://doi.org/10.1007/JHEP02(2021)169
Publication status	Published - 19 Feb 2021

Bibliographical note

Publisher Copyright:
© 2021, The Author(s)

Keywords

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

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1007/JHEP02(2021)169Licence: Creative Commons: Attribution (CC BY)

AaijR2021MeasurementFinal published version, 1.71 MBLicence: Creative Commons: Attribution (CC BY)

Cite this

@article{450ba72e5d504146a1d5a520088d5189,

title = "Measurement of the CKM angle γ in B± → DK± and B± → Dπ± decays with D → KS0 h+ h−",

abstract = "A measurement of CP-violating observables is performed using the decays B± → DK± and B± → Dπ±, where the D meson is reconstructed in one of the self-conjugate three-body final states KS0π+π− and KS0K+K− (commonly denoted KS0h+h−). The decays are analysed in bins of the D-decay phase space, leading to a measurement that is independent of the modelling of the D-decay amplitude. The observables are inter- preted in terms of the CKM angle γ. Using a data sample corresponding to an integrated luminosity of 9 fb−1 collected in proton-proton collisions at centre-of mass energies of 7, 8, and 13 TeV with the LHCb experiment, γ is measured to be (68.7−5.1+5.2)°. The hadronic parameters rBDK, rBDπ, δBDK, and δBDπ, which are the ratios and strong-phase differences of the suppressed and favoured B± decays, are also reported. ",

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

author = "{LHCb Collaboration} and R. Aaij and {Abell{\'a}n Beteta}, C. and T. Ackernley and B. Adeva and M. Adinolfi and H. Afsharnia 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 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. Baker and S. Bifani and R. Calladine and G. Chatzikonstantinidis and N. Cooke and V. Duk and N. Farley and P. Griffith and P. Ilten and Parkinson, {C. J.} and J. Plews and D. Popov and A. Sergi and Slater, {M. W.} and Swallow, {P. N.} and Watson, {N. K.} and Zarebski, {K. A.}",

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

year = "2021",

month = feb,

day = "19",

doi = "10.1007/JHEP02(2021)169",

language = "English",

volume = "2021",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

number = "2",

}

TY - JOUR

T1 - Measurement of the CKM angle γ in B± → DK± and B± → Dπ± decays with D → KS0 h+ h−

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Afsharnia, H.

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 - 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 - Baker, S.

AU - Bifani, S.

AU - Calladine, R.

AU - Chatzikonstantinidis, G.

AU - Cooke, N.

AU - Duk, V.

AU - Farley, N.

AU - Griffith, P.

AU - Ilten, P.

AU - Parkinson, C. J.

AU - Plews, J.

AU - Popov, D.

AU - Sergi, A.

AU - Slater, M. W.

AU - Swallow, P. N.

AU - Watson, N. K.

AU - Zarebski, K. A.

PY - 2021/2/19

Y1 - 2021/2/19

N2 - A measurement of CP-violating observables is performed using the decays B± → DK± and B± → Dπ±, where the D meson is reconstructed in one of the self-conjugate three-body final states KS0π+π− and KS0K+K− (commonly denoted KS0h+h−). The decays are analysed in bins of the D-decay phase space, leading to a measurement that is independent of the modelling of the D-decay amplitude. The observables are inter- preted in terms of the CKM angle γ. Using a data sample corresponding to an integrated luminosity of 9 fb−1 collected in proton-proton collisions at centre-of mass energies of 7, 8, and 13 TeV with the LHCb experiment, γ is measured to be (68.7−5.1+5.2)°. The hadronic parameters rBDK, rBDπ, δBDK, and δBDπ, which are the ratios and strong-phase differences of the suppressed and favoured B± decays, are also reported.

AB - A measurement of CP-violating observables is performed using the decays B± → DK± and B± → Dπ±, where the D meson is reconstructed in one of the self-conjugate three-body final states KS0π+π− and KS0K+K− (commonly denoted KS0h+h−). The decays are analysed in bins of the D-decay phase space, leading to a measurement that is independent of the modelling of the D-decay amplitude. The observables are inter- preted in terms of the CKM angle γ. Using a data sample corresponding to an integrated luminosity of 9 fb−1 collected in proton-proton collisions at centre-of mass energies of 7, 8, and 13 TeV with the LHCb experiment, γ is measured to be (68.7−5.1+5.2)°. The hadronic parameters rBDK, rBDπ, δBDK, and δBDπ, which are the ratios and strong-phase differences of the suppressed and favoured B± decays, are also reported.

KW - B physics

KW - CKM angle gamma

KW - CP violation

KW - Flavor physics

KW - Hadron-Hadron scattering (experiments)

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U2 - 10.1007/JHEP02(2021)169

DO - 10.1007/JHEP02(2021)169

M3 - Article

AN - SCOPUS:85101405552

SN - 1126-6708

VL - 2021

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 2

M1 - 169

ER -