Measurement of CP Violation in B0→ψ(→ℓ+ℓ−)K0S(→π+π−) Decays

LHCb collaboration; Constantinos Vrahas; G Robertson; M Richardson-Slipper; S Petrucci; R H O'Neil; S E Mitchell; K Gizdov; A Bohare

doi:10.1103/PhysRevLett.132.021801

Measurement of CP Violation in B0→ψ(→ℓ+ℓ−)K0S(→π+π−) Decays

LHCb collaboration, Constantinos Vrahas, G Robertson, M Richardson-Slipper, S Petrucci, R H O'Neil, S E Mitchell, K Gizdov, A Bohare

School of Physics and Astronomy

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

Abstract

A measurement of time-dependent CP violation in the decays of B0 and ¯B0 mesons to the final states J/ψ(→μ+μ−)K0S, ψ(2S)(→μ+μ−)K0S and J/ψ(→e+e−)K0S with K0S→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 SψK0S=0.717±0.013(stat)±0.008(syst) and CψK0S=0.008±0.012(stat)±0.003(syst). This measurement of SψK0S 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
Pages (from-to)	1-12
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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10.1103/PhysRevLett.132.021801Licence: Creative Commons: Attribution (CC-BY)

http://arxiv.org/abs/2309.09728

3 Finished
4 Active

Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/04/23 → 30/09/25
Project: Research
Next generation photodetectors for future applications
Oliva, F. (Principal Investigator)
1/12/22 → 30/11/25
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/10/22 → 30/09/25
Project: Research

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@article{a04ca3fc4b3947c98db4a94b09a92cfc,

title = "Measurement of CP Violation in B0→ψ(→ℓ+ℓ−)K0S(→π+π−) Decays",

abstract = "A measurement of time-dependent CP violation in the decays of B0 and ¯B0 mesons to the final states J/ψ(→μ+μ−)K0S, ψ(2S)(→μ+μ−)K0S and J/ψ(→e+e−)K0S with K0S→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 SψK0S=0.717±0.013(stat)±0.008(syst) and CψK0S=0.008±0.012(stat)±0.003(syst). This measurement of SψK0S 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 William Barter and P.E.L. Clarke and S. Gambetta and F. Muheim and M. Needham and Mark Williams and Federico Betti and Robert Currie and S. Eisenhardt and Lavra, {Lais Soares} and Oliva Federica and Ozlem Ozcelik and Gediminas Sarpis and Constantinos Vrahas and G Robertson and M Richardson-Slipper and S Petrucci and O'Neil, {R H} and Mitchell, {S E} and K Gizdov and A Bohare",

note = "Funding Information: We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); MOST and NSFC (China); CNRS/IN2P3 (France); BMBF, DFG and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW and NCN (Poland); MCID/IFA (Romania); MICINN (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); DOE NP and NSF (USA). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (United Kingdom), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), Polish WLCG (Poland) and NERSC (USA). We are indebted to the communities behind the multiple open-source software packages on which we depend. Individual groups or members have received support from ARC and ARDC (Australia); Minciencias (Colombia); AvH Foundation (Germany); EPLANET, Marie Sk{\l}odowska-Curie Actions, ERC and NextGenerationEU (European Union); A*MIDEX, ANR, IPhU and Labex P2IO, and R{\'e}gion Auvergne-Rh{\^o}ne-Alpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, CAS CCEPP, Fundamental Research Funds for the Central Universities, and Sci. & Tech. Program of Guangzhou (China); GVA, XuntaGal, GENCAT, Inditex, InTalent and Prog. Atracci{\'o}n Talento, CM (Spain); SRC (Sweden); the Leverhulme Trust, the Royal Society and UKRI (United Kingdom). Publisher Copyright: {\textcopyright} 2024 CERN. ",

year = "2024",

month = jan,

day = "12",

doi = "10.1103/PhysRevLett.132.021801",

language = "English",

volume = "132",

pages = "1--12",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "2",

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TY - JOUR

T1 - Measurement of CP Violation in B0→ψ(→ℓ+ℓ−)K0S(→π+π−) Decays

AU - LHCb collaboration

AU - Barter, William

AU - Clarke, P.E.L.

AU - Gambetta, S.

AU - Muheim, F.

AU - Needham, M.

AU - Williams, Mark

AU - Betti, Federico

AU - Currie, Robert

AU - Eisenhardt, S.

AU - Lavra, Lais Soares

AU - Federica, Oliva

AU - Ozcelik, Ozlem

AU - Sarpis, Gediminas

AU - Vrahas, Constantinos

AU - Robertson, G

AU - Richardson-Slipper, M

AU - Petrucci, S

AU - O'Neil, R H

AU - Mitchell, S E

AU - Gizdov, K

AU - Bohare, A

N1 - Funding Information: We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); MOST and NSFC (China); CNRS/IN2P3 (France); BMBF, DFG and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW and NCN (Poland); MCID/IFA (Romania); MICINN (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); DOE NP and NSF (USA). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (United Kingdom), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), Polish WLCG (Poland) and NERSC (USA). We are indebted to the communities behind the multiple open-source software packages on which we depend. Individual groups or members have received support from ARC and ARDC (Australia); Minciencias (Colombia); AvH Foundation (Germany); EPLANET, Marie Skłodowska-Curie Actions, ERC and NextGenerationEU (European Union); A*MIDEX, ANR, IPhU and Labex P2IO, and Région Auvergne-Rhône-Alpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, CAS CCEPP, Fundamental Research Funds for the Central Universities, and Sci. & Tech. Program of Guangzhou (China); GVA, XuntaGal, GENCAT, Inditex, InTalent and Prog. Atracción Talento, CM (Spain); SRC (Sweden); the Leverhulme Trust, the Royal Society and UKRI (United Kingdom). Publisher Copyright: © 2024 CERN.

PY - 2024/1/12

Y1 - 2024/1/12

N2 - A measurement of time-dependent CP violation in the decays of B0 and ¯B0 mesons to the final states J/ψ(→μ+μ−)K0S, ψ(2S)(→μ+μ−)K0S and J/ψ(→e+e−)K0S with K0S→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 SψK0S=0.717±0.013(stat)±0.008(syst) and CψK0S=0.008±0.012(stat)±0.003(syst). This measurement of SψK0S 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 ¯B0 mesons to the final states J/ψ(→μ+μ−)K0S, ψ(2S)(→μ+μ−)K0S and J/ψ(→e+e−)K0S with K0S→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 SψK0S=0.717±0.013(stat)±0.008(syst) and CψK0S=0.008±0.012(stat)±0.003(syst). This measurement of SψK0S 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.

U2 - 10.1103/PhysRevLett.132.021801

DO - 10.1103/PhysRevLett.132.021801

M3 - Article

SN - 0031-9007

VL - 132

SP - 1

EP - 12

JO - Physical Review Letters

JF - Physical Review Letters

IS - 2

M1 - 021801

ER -

Measurement of CP Violation in B0→ψ(→ℓ+ℓ−)K0S(→π+π−) Decays

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Experimental Particle Physics at the University of Edinburgh

Next generation photodetectors for future applications

Experimental Particle Physics at the University of Edinburgh

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