Model-independent measurement of charm mixing parameters in B̅ → D0(→ KS0 π+π-)μ-ν̅μX decays

LHCb Collaboration

doi:10.1103/PhysRevD.108.052005

Model-independent measurement of charm mixing parameters in B̅ → D⁰(→ K_S⁰π⁺π^-)μ^-ν̅_μX decays

LHCb Collaboration

Physics and Astronomy

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Abstract

A measurement of charm mixing and CP-violating parameters is reported, using B̅ →D⁰(→ K_S⁰π⁺π^-)⁢μ^-ν̅_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
x_CP= [4.29 ± 1.48 (stat) ± 0.26(syst)] × 10^-3,
y_CP= [12.61 ± 3.12 (stat) ± 0.83(syst)] × 10^-3,
Δx = [-0.77 ± 0.93 (stat) ± 0.28(syst)] × 10^-3,
Δy = [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(→ K_S⁰π⁺π^-)π⁺ 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 - 1 Sept 2023

Bibliographical 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 Skłodowska-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.

ASJC Scopus subject areas

Nuclear and High Energy Physics

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Cite this

@article{53d04525ca264b1d9265312c4182c76b,

title = "Model-independent measurement of charm mixing parameters in B̅ → D0(→ KS0 π+π-)μ-ν̅μX decays",

abstract = "A measurement of charm mixing and CP-violating parameters is reported, using B̅ →D0(→ KS0π+π-)⁢μ-ν̅μX 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 arexCP = [4.29 ± 1.48 (stat) ± 0.26(syst)] × 10-3, yCP = [12.61 ± 3.12 (stat) ± 0.83(syst)] × 10-3, Δx = [-0.77 ± 0.93 (stat) ± 0.28(syst)] × 10-3, Δy = [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(→ KS0π+π-)π+ decays is reported.",

author = "{LHCb Collaboration} and 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. Bifani and R. Calladine and N. Cooke and V. Duk and P. Ilten and J. Plews and D. Popov and N. Sahoo and A. Sergi and Slater, {M. W.} and Swallow, {P. N.} and Thompson, {D. J.D.} and Watson, {N. K.}",

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 Sk{\l}odowska-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 = "1",

doi = "10.1103/PhysRevD.108.052005",

language = "English",

volume = "108",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society (APS)",

number = "5",

}

TY - JOUR

T1 - Model-independent measurement of charm mixing parameters in B̅ → D0(→ KS0 π+π-)μ-ν̅μX 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 - 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 - Bifani, S.

AU - Calladine, R.

AU - Cooke, N.

AU - Duk, V.

AU - Ilten, P.

AU - Plews, J.

AU - Popov, D.

AU - Sahoo, N.

AU - Sergi, A.

AU - Slater, M. W.

AU - Swallow, P. N.

AU - Thompson, D. J.D.

AU - Watson, N. K.

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 Skłodowska-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 - 2023/9/1

Y1 - 2023/9/1

N2 - A measurement of charm mixing and CP-violating parameters is reported, using B̅ →D0(→ KS0π+π-)⁢μ-ν̅μX 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 arexCP = [4.29 ± 1.48 (stat) ± 0.26(syst)] × 10-3, yCP = [12.61 ± 3.12 (stat) ± 0.83(syst)] × 10-3, Δx = [-0.77 ± 0.93 (stat) ± 0.28(syst)] × 10-3, Δy = [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(→ KS0π+π-)π+ decays is reported.

AB - A measurement of charm mixing and CP-violating parameters is reported, using B̅ →D0(→ KS0π+π-)⁢μ-ν̅μX 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 arexCP = [4.29 ± 1.48 (stat) ± 0.26(syst)] × 10-3, yCP = [12.61 ± 3.12 (stat) ± 0.83(syst)] × 10-3, Δx = [-0.77 ± 0.93 (stat) ± 0.28(syst)] × 10-3, Δy = [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(→ KS0π+π-)π+ decays is reported.

UR - http://www.scopus.com/inward/record.url?scp=85172811988&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.108.052005

DO - 10.1103/PhysRevD.108.052005

M3 - Article

AN - SCOPUS:85172811988

SN - 2470-0010

VL - 108

JO - Physical Review D

JF - Physical Review D

IS - 5

M1 - 052005

ER -