Measurement of CP violation in B 0 → D ∓π± decays

LHCb Collaboration

doi:10.1007/JHEP06(2018)084

Measurement of CP violation in B ⁰ → D ^∓π^± decays

LHCb Collaboration

Physics and Astronomy

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

8 Citations (Scopus)

117 Downloads (Pure)

Abstract

A measurement of the CP asymmetries S_f and S_f¯ in B⁰ → D^∓π^± decays is reported. The decays are reconstructed in a dataset collected with the LHCb experiment in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV and corresponding to an integrated luminosity of 3.0 fb⁻¹. The CP asymmetries are measured to be S_f = 0.058 ± 0.020(stat) ± 0.011(syst) and Sf¯=0.038±0.020(stat)±0.007(syst). These results are in agreement with, and more precise than, previous determinations. They are used to constrain angles of the unitarity triangle, | sin (2β + γ) | and γ, to intervals that are consistent with the current world-average values.[Figure not available: see fulltext.].

Original language	English
Article number	84
Number of pages	23
Journal	Journal of High Energy Physics
Volume	2018
Issue number	6
DOIs	https://doi.org/10.1007/JHEP06(2018)084
Publication status	Published - 18 Jun 2018

Keywords

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

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1007/JHEP06(2018)084Licence: Creative Commons: Attribution (CC BY)

R_Aaij_et_al_Measurement_of_CP_violation_Journal_of_High_Energy_Physics_2018
Checked for eligibility: 11/01/2018
Final published version, 1.47 MBLicence: Creative Commons: Attribution (CC BY)

Cite this

@article{c2cc5332b6e345e7a409b01f743a119b,

title = "Measurement of CP violation in B 0 → D ∓π± decays",

abstract = "A measurement of the CP asymmetries Sf and Sf¯ in B0 → D∓π± decays is reported. The decays are reconstructed in a dataset collected with the LHCb experiment in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV and corresponding to an integrated luminosity of 3.0 fb−1. The CP asymmetries are measured to be Sf = 0.058 ± 0.020(stat) ± 0.011(syst) and Sf¯=0.038±0.020(stat)±0.007(syst). These results are in agreement with, and more precise than, previous determinations. They are used to constrain angles of the unitarity triangle, | sin (2β + γ) | and γ, to intervals that are consistent with the current world-average values.[Figure not available: see fulltext.].",

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

author = "{LHCb Collaboration} and R. Aaij and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. and S. Ali and G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and F. Archilli and P. d{\textquoteright}Argent and {Arnau Romeu}, J. and A. Artamonov and M. Artuso and E. Aslanides and M. Atzeni and G. Auriemma and S. Bachmann and Back, {J. J.} and S. Baker and V. Balagura and W. Baldini and A. Baranov and Barlow, {R. J.} and S. Barsuk and S. Bifani and R. Calladine and G. Chatzikonstantinidis and N. Farley and P. Ilten and C. Lazzeroni and A. Mazurov and A. Sergi and Watson, {N. K.} and T. Williams and Zarebski, {K. A.}",

year = "2018",

month = jun,

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doi = "10.1007/JHEP06(2018)084",

language = "English",

volume = "2018",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

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TY - JOUR

T1 - Measurement of CP violation in B 0 → D ∓π± decays

AU - LHCb Collaboration

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Ali, S.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Archilli, F.

AU - d’Argent, P.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Auriemma, G.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Baranov, A.

AU - Barlow, R. J.

AU - Barsuk, S.

AU - Bifani, S.

AU - Calladine, R.

AU - Chatzikonstantinidis, G.

AU - Farley, N.

AU - Ilten, P.

AU - Lazzeroni, C.

AU - Mazurov, A.

AU - Sergi, A.

AU - Watson, N. K.

AU - Williams, T.

AU - Zarebski, K. A.

PY - 2018/6/18

Y1 - 2018/6/18

N2 - A measurement of the CP asymmetries Sf and Sf¯ in B0 → D∓π± decays is reported. The decays are reconstructed in a dataset collected with the LHCb experiment in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV and corresponding to an integrated luminosity of 3.0 fb−1. The CP asymmetries are measured to be Sf = 0.058 ± 0.020(stat) ± 0.011(syst) and Sf¯=0.038±0.020(stat)±0.007(syst). These results are in agreement with, and more precise than, previous determinations. They are used to constrain angles of the unitarity triangle, | sin (2β + γ) | and γ, to intervals that are consistent with the current world-average values.[Figure not available: see fulltext.].

AB - A measurement of the CP asymmetries Sf and Sf¯ in B0 → D∓π± decays is reported. The decays are reconstructed in a dataset collected with the LHCb experiment in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV and corresponding to an integrated luminosity of 3.0 fb−1. The CP asymmetries are measured to be Sf = 0.058 ± 0.020(stat) ± 0.011(syst) and Sf¯=0.038±0.020(stat)±0.007(syst). These results are in agreement with, and more precise than, previous determinations. They are used to constrain angles of the unitarity triangle, | sin (2β + γ) | and γ, to intervals that are consistent with the current world-average values.[Figure not available: see fulltext.].

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/JHEP06(2018)084

DO - 10.1007/JHEP06(2018)084

M3 - Article

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SN - 1126-6708

VL - 2018

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

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M1 - 84

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