Search for Time-Dependent CP Violation in D0 →π+π-π0 Decays

LHCb Collaboration

doi:10.1103/PhysRevLett.133.101803

Search for Time-Dependent CP Violation in D⁰ →π⁺π^-π⁰ Decays

LHCb Collaboration

Physics and Astronomy

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Abstract

A measurement of time-dependent CP violation in D⁰ →π⁺π^-π⁰ decays using a pp collision data sample collected by the LHCb experiment in 2012 and from 2015 to 2018, corresponding to an integrated luminosity of 7.7 fb^-1, is presented. The initial flavor of each D0 candidate is determined from the charge of the pion produced in the D^∗(2010)⁺→D⁰π⁺decay. The decay D⁰→K^-π⁺π⁰ is used as a control channel to validate the measurement procedure. The gradient of the time-dependent CP asymmetry ΔY in D⁰ →π⁺π^-π⁰ decays is measured to be ΔY=(-1.3±6.3±2.4)×10^-4, where the first uncertainty is statistical and the second is systematic, which is compatible with CP conservation.

Original language	English
Article number	101803
Journal	Physical Review Letters
Volume	133
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.133.101803
Publication status	Published - 5 Sept 2024

Bibliographical note

Publisher Copyright:
© 2024 CERN., for the LHCb Collaboration. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

ASJC Scopus subject areas

General Physics and Astronomy

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Cite this

@article{19da478f416d40649545b1963e64b9d8,

title = "Search for Time-Dependent CP Violation in D0 →π+π-π0 Decays",

abstract = "A measurement of time-dependent CP violation in D0 →π+π-π0 decays using a pp collision data sample collected by the LHCb experiment in 2012 and from 2015 to 2018, corresponding to an integrated luminosity of 7.7 fb-1, is presented. The initial flavor of each D0 candidate is determined from the charge of the pion produced in the D∗(2010)+→D0π+ decay. The decay D0→K-π+π0 is used as a control channel to validate the measurement procedure. The gradient of the time-dependent CP asymmetry ΔY in D0 →π+π-π0 decays is measured to be ΔY=(-1.3±6.3±2.4)×10-4, where the first uncertainty is statistical and the second is systematic, which is compatible with CP conservation.",

author = "{LHCb Collaboration} and R. Aaij and Abdelmotteleb, {A. S.W.} and {Abellan Beteta}, C. and F. Abudin{\'e}n and T. Ackernley and Adefisoye, {A. A.} and B. Adeva and M. Adinolfi and P. Adlarson and C. Agapopoulou and Aidala, {C. A.} and Z. Ajaltouni and S. Akar and K. Akiba and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and Z. Aliouche and {Alvarez Cartelle}, P. and R. Amalric and S. Amato and Amey, {J. L.} and Y. Amhis and L. An and L. Anderlini and M. Andersson and A. Andreianov and P. Andreola and M. Andreotti and D. Andreou and A. Anelli and D. Ao and F. Archilli and M. Argenton and {Arguedas Cuendis}, S. and A. Artamonov and V. Duk and P. Ilten and D. Johnson and C. Lazzeroni and Madurai, {M. M.} and D. Popov and N. Sahoo and A. Sergi and Slater, {M. W.} and Swallow, {P. N.} and Thompson, {D. J.D.} and Volle, {F. C.} and Watson, {N. K.}",

note = "Publisher Copyright: {\textcopyright} 2024 CERN., for the LHCb Collaboration. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",

year = "2024",

month = sep,

day = "5",

doi = "10.1103/PhysRevLett.133.101803",

language = "English",

volume = "133",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

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TY - JOUR

T1 - Search for Time-Dependent CP Violation in D0 →π+π-π0 Decays

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellan Beteta, C.

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adefisoye, A. A.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adlarson, P.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Akiba, K.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Aliouche, Z.

AU - Alvarez Cartelle, P.

AU - Amalric, R.

AU - Amato, S.

AU - Amey, J. L.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andersson, M.

AU - Andreianov, A.

AU - Andreola, P.

AU - Andreotti, M.

AU - Andreou, D.

AU - Anelli, A.

AU - Ao, D.

AU - Archilli, F.

AU - Argenton, M.

AU - Arguedas Cuendis, S.

AU - Artamonov, A.

AU - Duk, V.

AU - Ilten, P.

AU - Johnson, D.

AU - Lazzeroni, C.

AU - Madurai, M. M.

AU - Popov, D.

AU - Sahoo, N.

AU - Sergi, A.

AU - Slater, M. W.

AU - Swallow, P. N.

AU - Thompson, D. J.D.

AU - Volle, F. C.

AU - Watson, N. K.

N1 - Publisher Copyright: © 2024 CERN., for the LHCb Collaboration. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2024/9/5

Y1 - 2024/9/5

N2 - A measurement of time-dependent CP violation in D0 →π+π-π0 decays using a pp collision data sample collected by the LHCb experiment in 2012 and from 2015 to 2018, corresponding to an integrated luminosity of 7.7 fb-1, is presented. The initial flavor of each D0 candidate is determined from the charge of the pion produced in the D∗(2010)+→D0π+ decay. The decay D0→K-π+π0 is used as a control channel to validate the measurement procedure. The gradient of the time-dependent CP asymmetry ΔY in D0 →π+π-π0 decays is measured to be ΔY=(-1.3±6.3±2.4)×10-4, where the first uncertainty is statistical and the second is systematic, which is compatible with CP conservation.

AB - A measurement of time-dependent CP violation in D0 →π+π-π0 decays using a pp collision data sample collected by the LHCb experiment in 2012 and from 2015 to 2018, corresponding to an integrated luminosity of 7.7 fb-1, is presented. The initial flavor of each D0 candidate is determined from the charge of the pion produced in the D∗(2010)+→D0π+ decay. The decay D0→K-π+π0 is used as a control channel to validate the measurement procedure. The gradient of the time-dependent CP asymmetry ΔY in D0 →π+π-π0 decays is measured to be ΔY=(-1.3±6.3±2.4)×10-4, where the first uncertainty is statistical and the second is systematic, which is compatible with CP conservation.

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DO - 10.1103/PhysRevLett.133.101803

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