Measurement of CP-violating and mixing-induced observables in cBs0 →φγ decays

LHCb Collaboration

doi:10.1103/PhysRevLett.123.081802

Measurement of CP-violating and mixing-induced observables in cB_s⁰ →φγ decays

LHCb Collaboration

Physics and Astronomy

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

6 Citations (Scopus)

153 Downloads (Pure)

Abstract

A time-dependent analysis of the B_s⁰→φγ decay rate is performed to determine the CP -violating observables S_φγ and C_φγ and the mixing-induced observable 𝒜_φγ^Δ. The measurement is based on a sample of pp collision data recorded with the LHCb detector, corresponding to an integrated luminosity of 3 fb^-1 at center-of-mass energies of 7 and 8 TeV. The measured values are S_φγ=0.43±0.30±0.11, C_φγ=0.11±0.29±0.11, and 𝒜_φγ^Δ=-0.67_-0.41^+0.37±0.17, where the first uncertainty is statistical and the second systematic. This is the first measurement of the observables S and C in radiative B_s⁰ decays. The results are consistent with the standard model predictions.

Original language	English
Article number	081802
Number of pages	10
Journal	Physical Review Letters
Volume	123
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.123.081802
Publication status	Published - 23 Aug 2019

ASJC Scopus subject areas

General Physics and Astronomy

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Cite this

@article{a050e08a39f24436bb4fedc5ce6491f7,

title = "Measurement of CP-violating and mixing-induced observables in cBs0 →φγ decays",

abstract = "A time-dependent analysis of the Bs0→φγ decay rate is performed to determine the CP -violating observables Sφγ and Cφγ and the mixing-induced observable 풜φγΔ. The measurement is based on a sample of pp collision data recorded with the LHCb detector, corresponding to an integrated luminosity of 3 fb-1 at center-of-mass energies of 7 and 8 TeV. The measured values are Sφγ=0.43±0.30±0.11, Cφγ=0.11±0.29±0.11, and 풜φγΔ=-0.67-0.41+0.37±0.17, where the first uncertainty is statistical and the second systematic. This is the first measurement of the observables S and C in radiative Bs0 decays. The results are consistent with the standard model predictions.",

author = "\{LHCb Collaboration\} and R. Aaij and \{Abell{\'a}n Beteta\}, C. and B. Adeva and M. Adinolfi and Aidala, \{C. A.\} and Z. Ajaltouni and S. Akar and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and \{Alfonso Albero\}, A. and G. Alkhazov and \{Alvarez Cartelle\}, P. and Alves, \{A. A.\} and S. Amato and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, \{J. E.\} and F. Archilli and \{Arnau Romeu\}, J. and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and Back, \{J. J.\} and S. Baker and V. Balagura and W. Baldini and S. Bifani and R. Calladine and G. Chatzikonstantinidis and N. Farley and P. Griffith and P. Ilten and C. Lazzeroni and L. Pescatore and J. Plews and D. Popov and A. Sergi and Slater, \{M. W.\} and Watson, \{N. K.\} and T. Williams and Zarebski, \{K. A.\}",

year = "2019",

month = aug,

day = "23",

doi = "10.1103/PhysRevLett.123.081802",

language = "English",

volume = "123",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

number = "8",

}

TY - JOUR

T1 - Measurement of CP-violating and mixing-induced observables in cBs0 →φγ decays

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Archilli, F.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Bifani, S.

AU - Calladine, R.

AU - Chatzikonstantinidis, G.

AU - Farley, N.

AU - Griffith, P.

AU - Ilten, P.

AU - Lazzeroni, C.

AU - Pescatore, L.

AU - Plews, J.

AU - Popov, D.

AU - Sergi, A.

AU - Slater, M. W.

AU - Watson, N. K.

AU - Williams, T.

AU - Zarebski, K. A.

PY - 2019/8/23

Y1 - 2019/8/23

N2 - A time-dependent analysis of the Bs0→φγ decay rate is performed to determine the CP -violating observables Sφγ and Cφγ and the mixing-induced observable 풜φγΔ. The measurement is based on a sample of pp collision data recorded with the LHCb detector, corresponding to an integrated luminosity of 3 fb-1 at center-of-mass energies of 7 and 8 TeV. The measured values are Sφγ=0.43±0.30±0.11, Cφγ=0.11±0.29±0.11, and 풜φγΔ=-0.67-0.41+0.37±0.17, where the first uncertainty is statistical and the second systematic. This is the first measurement of the observables S and C in radiative Bs0 decays. The results are consistent with the standard model predictions.

AB - A time-dependent analysis of the Bs0→φγ decay rate is performed to determine the CP -violating observables Sφγ and Cφγ and the mixing-induced observable 풜φγΔ. The measurement is based on a sample of pp collision data recorded with the LHCb detector, corresponding to an integrated luminosity of 3 fb-1 at center-of-mass energies of 7 and 8 TeV. The measured values are Sφγ=0.43±0.30±0.11, Cφγ=0.11±0.29±0.11, and 풜φγΔ=-0.67-0.41+0.37±0.17, where the first uncertainty is statistical and the second systematic. This is the first measurement of the observables S and C in radiative Bs0 decays. The results are consistent with the standard model predictions.

UR - https://www.scopus.com/pages/publications/85071896937

U2 - 10.1103/PhysRevLett.123.081802

DO - 10.1103/PhysRevLett.123.081802

M3 - Article

C2 - 31491228

AN - SCOPUS:85071896937

SN - 0031-9007

VL - 123

JO - Physical Review Letters

JF - Physical Review Letters

IS - 8

M1 - 081802

ER -