Measurement of CP Violation in B0 →ψ (→ℓ+ℓ-) KS0 (→π+π-) Decays

LHCb Collaboration; R. Aaij; A.S.W. Abdelmotteleb; C. Abellan Beteta; F. Abudinén; T. Ackernley; B. Adeva; M. Adinolfi; Kristof de Bruyn; Mick Mulder

doi:10.1103/PhysRevLett.132.021801

Measurement of CP Violation in B0 →ψ (→ℓ+ℓ-) KS0 (→π+π-) Decays

LHCb Collaboration
, R. Aaij
, A.S.W. Abdelmotteleb
, C. Abellan Beteta
, F. Abudinén
, T. Ackernley
, B. Adeva
, M. Adinolfi
, Kristof de Bruyn
, Mick Mulder

High-Energy Frontier

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

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Abstract

A measurement of time-dependent CP violation in the decays of B0 and B¯0 mesons to the final states J/ψ(→μ+μ-)KS0, ψ(2S)(→μ+μ-)KS0 and J/ψ(→e+e-)KS0 with KS0→π+π- is presented. The data correspond to an integrated luminosity of 6 fb-1 collected at a center-of-mass energy of s=13 TeV with the LHCb detector. The CP-violation parameters are measured to be SψKS0=0.717±0.013(stat)±0.008(syst) and CψKS0=0.008±0.012(stat)±0.003(syst). This measurement of SψKS0 represents the most precise single measurement of the CKM angle β to date and is more precise than the current world average. In addition, measurements of the CP-violation parameters of the individual channels are reported and a combination with the LHCb Run 1 measurements is performed.

Original language	English
Article number	021801
Number of pages	12
Journal	Physical Review Letters
Volume	132
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.132.021801
Publication status	Published - 12-Jan-2024

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Measurement of 𝐶⁢𝑃 Violation in 𝐵0→𝜓⁡(→ℓ+⁢ℓ−)⁢𝐾0 𝑆⁡(→𝜋+⁢𝜋−) DecaysFinal publisher's version, 18.2 MBLicence: CC BY

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@article{913a873069384c0cbde327ad052b2f4a,

title = "Measurement of CP Violation in B0 →ψ (→ℓ+ℓ-) KS0 (→π+π-) Decays",

abstract = "A measurement of time-dependent CP violation in the decays of B0 and B¯0 mesons to the final states J/ψ(→μ+μ-)KS0, ψ(2S)(→μ+μ-)KS0 and J/ψ(→e+e-)KS0 with KS0→π+π- is presented. The data correspond to an integrated luminosity of 6 fb-1 collected at a center-of-mass energy of s=13 TeV with the LHCb detector. The CP-violation parameters are measured to be SψKS0=0.717±0.013(stat)±0.008(syst) and CψKS0=0.008±0.012(stat)±0.003(syst). This measurement of SψKS0 represents the most precise single measurement of the CKM angle β to date and is more precise than the current world average. In addition, measurements of the CP-violation parameters of the individual channels are reported and a combination with the LHCb Run 1 measurements is performed.",

author = "\{LHCb Collaboration\} and R. Aaij and A.S.W. Abdelmotteleb and \{Abellan Beteta\}, C. and F. Abudin{\'e}n and T. Ackernley and B. Adeva and M. Adinolfi and \{de Bruyn\}, Kristof and Mick Mulder",

note = "Publisher Copyright: {\textcopyright} 2024 CERN.",

year = "2024",

month = jan,

day = "12",

doi = "10.1103/PhysRevLett.132.021801",

language = "English",

volume = "132",

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TY - JOUR

T1 - Measurement of CP Violation in B0 →ψ (→ℓ+ℓ-) KS0 (→π+π-) Decays

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abdelmotteleb, A.S.W.

AU - Abellan Beteta, C.

AU - Abudinén, F.

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - de Bruyn, Kristof

AU - Mulder, Mick

PY - 2024/1/12

Y1 - 2024/1/12

N2 - A measurement of time-dependent CP violation in the decays of B0 and B¯0 mesons to the final states J/ψ(→μ+μ-)KS0, ψ(2S)(→μ+μ-)KS0 and J/ψ(→e+e-)KS0 with KS0→π+π- is presented. The data correspond to an integrated luminosity of 6 fb-1 collected at a center-of-mass energy of s=13 TeV with the LHCb detector. The CP-violation parameters are measured to be SψKS0=0.717±0.013(stat)±0.008(syst) and CψKS0=0.008±0.012(stat)±0.003(syst). This measurement of SψKS0 represents the most precise single measurement of the CKM angle β to date and is more precise than the current world average. In addition, measurements of the CP-violation parameters of the individual channels are reported and a combination with the LHCb Run 1 measurements is performed.

AB - A measurement of time-dependent CP violation in the decays of B0 and B¯0 mesons to the final states J/ψ(→μ+μ-)KS0, ψ(2S)(→μ+μ-)KS0 and J/ψ(→e+e-)KS0 with KS0→π+π- is presented. The data correspond to an integrated luminosity of 6 fb-1 collected at a center-of-mass energy of s=13 TeV with the LHCb detector. The CP-violation parameters are measured to be SψKS0=0.717±0.013(stat)±0.008(syst) and CψKS0=0.008±0.012(stat)±0.003(syst). This measurement of SψKS0 represents the most precise single measurement of the CKM angle β to date and is more precise than the current world average. In addition, measurements of the CP-violation parameters of the individual channels are reported and a combination with the LHCb Run 1 measurements is performed.

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U2 - 10.1103/PhysRevLett.132.021801

DO - 10.1103/PhysRevLett.132.021801

M3 - Article

SN - 0031-9007

VL - 132

JO - Physical Review Letters

JF - Physical Review Letters

IS - 2

M1 - 021801

ER -

Measurement of CP Violation in B0 →ψ (→ℓ+ℓ-) KS0 (→π+π-) Decays

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