Constraints on the CKM angle γ from B  ± → Dh  ± decays using D → h  ± h′∓ π 0 final states

LHCb Collaboration

doi:10.1007/JHEP07(2022)099

Constraints on the CKM angle γ from B ^± → Dh ^± decays using D → h ^± h′^∓ π ⁰ final states

LHCb Collaboration

Physics and Astronomy

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Abstract

A data sample collected with the LHCb detector corresponding to an integrated luminosity of 9 fb⁻¹ is used to measure eleven CP violation observables in B^±→ Dh^± decays, where h is either a kaon or a pion. The neutral D meson decay is reconstructed in the three-body final states: K^±π^∓π⁰; π⁺π⁻π⁰; K⁺K⁻π⁰ and the suppressed π^±K^∓π⁰ combination. The mode where a large CP asymmetry is expected, B^±→ [π^±K^∓π⁰]_DK^±, is observed with a significance greater than seven standard deviations. The ratio of the partial width of this mode relative to that of the favoured mode, B^±→ [K^±π^∓π⁰]_DK^±, is R_ADS(K) = (1.27 ± 0.16 ± 0.02) × 10⁻². Evidence for a large CP asymmetry is also seen: A_ADS(K) = −0.38 ± 0.12 ± 0.02. Constraints on the CKM angle γ are calculated from the eleven reported observables.

Original language	English
Article number	99
Number of pages	24
Journal	Journal of High Energy Physics
Volume	2022
Issue number	7
DOIs	https://doi.org/10.1007/JHEP07(2022)099
Publication status	Published - 15 Jul 2022

Bibliographical note

Publisher Copyright:
© 2022, The Author(s).

Keywords

B Physics
CKM Angle Gamma
CP Violation
Hadron-Hadron Scattering

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1007/JHEP07(2022)099Licence: Creative Commons: Attribution (CC BY)

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Cite this

@article{cf2997d9824c41dc80b9a5b2b1110c1f,

title = "Constraints on the CKM angle γ from B ± → Dh ± decays using D → h ± h′∓ π 0 final states",

abstract = "A data sample collected with the LHCb detector corresponding to an integrated luminosity of 9 fb−1 is used to measure eleven CP violation observables in B±→ Dh± decays, where h is either a kaon or a pion. The neutral D meson decay is reconstructed in the three-body final states: K±π∓π0; π+π−π0; K+K−π0 and the suppressed π±K∓π0 combination. The mode where a large CP asymmetry is expected, B±→ [π±K∓π0]DK±, is observed with a significance greater than seven standard deviations. The ratio of the partial width of this mode relative to that of the favoured mode, B±→ [K±π∓π0]DK±, is RADS(K) = (1.27 ± 0.16 ± 0.02) × 10−2. Evidence for a large CP asymmetry is also seen: AADS(K) = −0.38 ± 0.12 ± 0.02. Constraints on the CKM angle γ are calculated from the eleven reported observables.",

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

author = "{LHCb Collaboration} and R. Aaij and Abdelmotteleb, {A. S.W.} and {Abell{\'a}n Beteta}, C. and {Abudinen Gallego}, {F. J.} 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 N. Andersson 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 Watson, {N. K.}",

note = "Publisher Copyright: {\textcopyright} 2022, The Author(s).",

year = "2022",

month = jul,

day = "15",

doi = "10.1007/JHEP07(2022)099",

language = "English",

volume = "2022",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

number = "7",

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TY - JOUR

T1 - Constraints on the CKM angle γ from B ± → Dh ± decays using D → h ± h′∓ π 0 final states

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellán Beteta, C.

AU - Abudinen Gallego, F. J.

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 - Andersson, N.

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 - Watson, N. K.

PY - 2022/7/15

Y1 - 2022/7/15

N2 - A data sample collected with the LHCb detector corresponding to an integrated luminosity of 9 fb−1 is used to measure eleven CP violation observables in B±→ Dh± decays, where h is either a kaon or a pion. The neutral D meson decay is reconstructed in the three-body final states: K±π∓π0; π+π−π0; K+K−π0 and the suppressed π±K∓π0 combination. The mode where a large CP asymmetry is expected, B±→ [π±K∓π0]DK±, is observed with a significance greater than seven standard deviations. The ratio of the partial width of this mode relative to that of the favoured mode, B±→ [K±π∓π0]DK±, is RADS(K) = (1.27 ± 0.16 ± 0.02) × 10−2. Evidence for a large CP asymmetry is also seen: AADS(K) = −0.38 ± 0.12 ± 0.02. Constraints on the CKM angle γ are calculated from the eleven reported observables.

AB - A data sample collected with the LHCb detector corresponding to an integrated luminosity of 9 fb−1 is used to measure eleven CP violation observables in B±→ Dh± decays, where h is either a kaon or a pion. The neutral D meson decay is reconstructed in the three-body final states: K±π∓π0; π+π−π0; K+K−π0 and the suppressed π±K∓π0 combination. The mode where a large CP asymmetry is expected, B±→ [π±K∓π0]DK±, is observed with a significance greater than seven standard deviations. The ratio of the partial width of this mode relative to that of the favoured mode, B±→ [K±π∓π0]DK±, is RADS(K) = (1.27 ± 0.16 ± 0.02) × 10−2. Evidence for a large CP asymmetry is also seen: AADS(K) = −0.38 ± 0.12 ± 0.02. Constraints on the CKM angle γ are calculated from the eleven reported observables.

KW - B Physics

KW - CKM Angle Gamma

KW - CP Violation

KW - Hadron-Hadron Scattering

UR - http://www.scopus.com/inward/record.url?scp=85134345806&partnerID=8YFLogxK

U2 - 10.1007/JHEP07(2022)099

DO - 10.1007/JHEP07(2022)099

M3 - Article

AN - SCOPUS:85134345806

SN - 1126-6708

VL - 2022

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 7

M1 - 99

ER -

Constraints on the CKM angle γ from B ± → Dh ± decays using D → h ± h′∓ π 0 final states