Model-independent measurement of charm mixing parameters in B ¯ ?d0 (? KS0 p+p-)µ- ? ¯ µx decays

LHCb collaboration

doi:10.1103/PhysRevD.108.052005

Model-independent measurement of charm mixing parameters in B ¯ ?d0 (? KS0 p+p-)µ- ? ¯ µx decays

LHCb collaboration

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

Abstract

A measurement of charm mixing and CP-violating parameters is reported, using B¯?D0(?KS0p+p-)?µ-?¯µX decays reconstructed in proton-proton collisions collected by the LHCb experiment during the years 2016 to 2018, corresponding to an integrated luminosity of 5.4 fb-1. The measured mixing and CP-violating parameters are xCP=[4.29±1.48(stat)±0.26(syst)]×10-3, yCP=[12.61±3.12(stat)±0.83(syst)]×10-3, ?x=[-0.77±0.93(stat)±0.28(syst)]×10-3, ?y=[3.01±1.92(stat)±0.26(syst)]×10-3. The results are complementary to and consistent with previous measurements. A combination with the recent LHCb analysis of D*+?D0(?KS0p+p-)p+ decays is reported.

Original language	English
Article number	052005
Number of pages	17
Journal	Physical Review D
Volume	108
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.108.052005
Publication status	Published - 6 Sept 2023

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10.1103/PhysRevD.108.052005Licence: CC BY

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@article{889448b4dcc44c788a0b21601f3769cb,

title = "Model-independent measurement of charm mixing parameters in B ¯ ?d0 (? KS0 p+p-)µ- ? ¯ µx decays",

abstract = "A measurement of charm mixing and CP-violating parameters is reported, using B¯?D0(?KS0p+p-)?µ-?¯µX decays reconstructed in proton-proton collisions collected by the LHCb experiment during the years 2016 to 2018, corresponding to an integrated luminosity of 5.4 fb-1. The measured mixing and CP-violating parameters are xCP=[4.29±1.48(stat)±0.26(syst)]×10-3, yCP=[12.61±3.12(stat)±0.83(syst)]×10-3, ?x=[-0.77±0.93(stat)±0.28(syst)]×10-3, ?y=[3.01±1.92(stat)±0.26(syst)]×10-3. The results are complementary to and consistent with previous measurements. A combination with the recent LHCb analysis of D*+?D0(?KS0p+p-)p+ decays is reported.",

author = "R. Aaij and Abdelmotteleb, {A. S.W.} and {Abellan Beteta}, C. and F. Abudin{\'e}n and T. Ackernley and B. Adeva and M. Adinolfi and H. Afsharnia and C. Agapopoulou and Aidala, {C. A.} and S. Aiola and Z. Ajaltouni and S. Akar and K. Akiba and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. 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 M. Andreotti and D. Andreou and D. Ao and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and M. Bachmayer and Back, {J. J.} and A. Bailly-Reyre and {Baladron Rodriguez}, P. and V. Balagura and W. Baldini and {Baptista De Souza Leite}, J. and M. Barbetti and Barlow, {R. J.} and S. Barsuk and W. Barter and M. Bartolini and {LHCb collaboration} and Marcel Merk and Chris Pawley and {de Vries}, Jacco and Keri Vos and {C{\'a}mpora P{\'e}rez}, {Daniel Hugo} and {da silva Bolognani}, Carolina and {Lucio Martinez}, Miriam",

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); MEN/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 Sklodowska-Curie Actions and ERC (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 and Prog. Atracci{\'o}n Talento, CM (Spain); SRC (Sweden); the Leverhulme Trust, the Royal Society and UKRI (United Kingdom). Publisher Copyright: {\textcopyright} 2023 CERN.",

year = "2023",

month = sep,

day = "6",

doi = "10.1103/PhysRevD.108.052005",

language = "English",

volume = "108",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "American Physical Society",

number = "5",

}

TY - JOUR

T1 - Model-independent measurement of charm mixing parameters in B ¯ ?d0 (? KS0 p+p-)µ- ? ¯ µx decays

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 - Afsharnia, H.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Aiola, S.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Akiba, K.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

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 - Andreotti, M.

AU - Andreou, D.

AU - Ao, D.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Bachmayer, M.

AU - Back, J. J.

AU - Bailly-Reyre, A.

AU - Baladron Rodriguez, P.

AU - Balagura, V.

AU - Baldini, W.

AU - Baptista De Souza Leite, J.

AU - Barbetti, M.

AU - Barlow, R. J.

AU - Barsuk, S.

AU - Barter, W.

AU - Bartolini, M.

AU - LHCb collaboration

AU - Merk, Marcel

AU - Pawley, Chris

AU - de Vries, Jacco

AU - Vos, Keri

AU - Cámpora Pérez, Daniel Hugo

AU - da silva Bolognani, Carolina

AU - Lucio Martinez, Miriam

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); MEN/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 Sklodowska-Curie Actions and ERC (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 and Prog. Atracción Talento, CM (Spain); SRC (Sweden); the Leverhulme Trust, the Royal Society and UKRI (United Kingdom). Publisher Copyright: © 2023 CERN.

PY - 2023/9/6

Y1 - 2023/9/6

N2 - A measurement of charm mixing and CP-violating parameters is reported, using B¯?D0(?KS0p+p-)?µ-?¯µX decays reconstructed in proton-proton collisions collected by the LHCb experiment during the years 2016 to 2018, corresponding to an integrated luminosity of 5.4 fb-1. The measured mixing and CP-violating parameters are xCP=[4.29±1.48(stat)±0.26(syst)]×10-3, yCP=[12.61±3.12(stat)±0.83(syst)]×10-3, ?x=[-0.77±0.93(stat)±0.28(syst)]×10-3, ?y=[3.01±1.92(stat)±0.26(syst)]×10-3. The results are complementary to and consistent with previous measurements. A combination with the recent LHCb analysis of D*+?D0(?KS0p+p-)p+ decays is reported.

AB - A measurement of charm mixing and CP-violating parameters is reported, using B¯?D0(?KS0p+p-)?µ-?¯µX decays reconstructed in proton-proton collisions collected by the LHCb experiment during the years 2016 to 2018, corresponding to an integrated luminosity of 5.4 fb-1. The measured mixing and CP-violating parameters are xCP=[4.29±1.48(stat)±0.26(syst)]×10-3, yCP=[12.61±3.12(stat)±0.83(syst)]×10-3, ?x=[-0.77±0.93(stat)±0.28(syst)]×10-3, ?y=[3.01±1.92(stat)±0.26(syst)]×10-3. The results are complementary to and consistent with previous measurements. A combination with the recent LHCb analysis of D*+?D0(?KS0p+p-)p+ decays is reported.

U2 - 10.1103/PhysRevD.108.052005

DO - 10.1103/PhysRevD.108.052005

M3 - Article

SN - 1550-7998

VL - 108

JO - Physical Review D

JF - Physical Review D

IS - 5

M1 - 052005

ER -