Observation of Cabibbo-Suppressed Two-Body Hadronic Decays and Precision Mass Measurement of the ?c0 Baryon

LHCb collaboration

doi:10.1103/PhysRevLett.132.081802

Observation of Cabibbo-Suppressed Two-Body Hadronic Decays and Precision Mass Measurement of the ?c0 Baryon

LHCb collaboration

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

Abstract

The first observation of the singly Cabibbo-suppressed ?c0??-K+ and ?c0??-p+ decays is reported, using proton-proton collision data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb-1, collected with the LHCb detector between 2016 and 2018. The branching fraction ratios are measured to be B(?c0??-K+)B(?c0??-p+)=[6.08±0.51(stat)±0.40(syst)]%,B(?c0??-p+)B(?c0??-p+)=[15.81±0.87(stat)±0.44(syst)±0.16(ext)]%. In addition, using the ?c0??-p+ decay channel, the ?c0 baryon mass is measured to be M(?c0)=2695.28±0.07(stat)±0.27(syst)±0.30(ext) MeV, improving the precision of the previous world average by a factor of 4.

Original language	English
Article number	081802
Journal	Physical Review Letters
Volume	132
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.132.081802
Publication status	E-pub ahead of print - 23 Feb 2024

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10.1103/PhysRevLett.132.081802Licence: CC BY

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@article{461f7f72d0ee445d80f71dcfd63ad2e5,

title = "Observation of Cabibbo-Suppressed Two-Body Hadronic Decays and Precision Mass Measurement of the ?c0 Baryon",

abstract = "The first observation of the singly Cabibbo-suppressed ?c0??-K+ and ?c0??-p+ decays is reported, using proton-proton collision data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb-1, collected with the LHCb detector between 2016 and 2018. The branching fraction ratios are measured to be B(?c0??-K+)B(?c0??-p+)=[6.08±0.51(stat)±0.40(syst)]%,B(?c0??-p+)B(?c0??-p+)=[15.81±0.87(stat)±0.44(syst)±0.16(ext)]%. In addition, using the ?c0??-p+ decay channel, the ?c0 baryon mass is measured to be M(?c0)=2695.28±0.07(stat)±0.27(syst)±0.30(ext) MeV, improving the precision of the previous world average by a factor of 4.",

author = "R. Aaij and Abdelmotteleb, {A. S.W.} and {Abellan Beteta}, C. and F. Abudinen and T. Ackernley and B. Adeva and M. Adinolfi and P. Adlarson and H. Afsharnia and C. Agapopoulou and Aidala, {C. A.} and Z. Ajaltouni and S. Akar and K. Akiba and P. Albicocco 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 P. Andreola 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 D. Bacher and {Bachiller Perea}, I. 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 {LHCb collaboration} and {da silva Bolognani}, Carolina and {C{\'a}mpora P{\'e}rez}, {Daniel Hugo} and {de Vries}, Jacco and {Lucio Martinez}, Miriam and Marcel Merk and Davide Nicotra and Gerco Onderwater and Chris Pawley and Keri Vos",

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, 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); and the Leverhulme Trust, the Royal Society, and UKRI (United Kingdom). Publisher Copyright: {\textcopyright} 2024 CERN.",

year = "2024",

month = feb,

day = "23",

doi = "10.1103/PhysRevLett.132.081802",

language = "English",

volume = "132",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "8",

}

TY - JOUR

T1 - Observation of Cabibbo-Suppressed Two-Body Hadronic Decays and Precision Mass Measurement of the ?c0 Baryon

AU - Aaij, R.

AU - Abdelmotteleb, A. S.W.

AU - Abellan Beteta, C.

AU - Abudinen, F.

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adlarson, P.

AU - Afsharnia, H.

AU - Agapopoulou, C.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Akiba, K.

AU - Albicocco, P.

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 - Andreola, P.

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 - Bacher, D.

AU - Bachiller Perea, I.

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 - LHCb collaboration

AU - da silva Bolognani, Carolina

AU - Cámpora Pérez, Daniel Hugo

AU - de Vries, Jacco

AU - Lucio Martinez, Miriam

AU - Merk, Marcel

AU - Nicotra, Davide

AU - Onderwater, Gerco

AU - Pawley, Chris

AU - Vos, Keri

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, 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); and the Leverhulme Trust, the Royal Society, and UKRI (United Kingdom). Publisher Copyright: © 2024 CERN.

PY - 2024/2/23

Y1 - 2024/2/23

N2 - The first observation of the singly Cabibbo-suppressed ?c0??-K+ and ?c0??-p+ decays is reported, using proton-proton collision data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb-1, collected with the LHCb detector between 2016 and 2018. The branching fraction ratios are measured to be B(?c0??-K+)B(?c0??-p+)=[6.08±0.51(stat)±0.40(syst)]%,B(?c0??-p+)B(?c0??-p+)=[15.81±0.87(stat)±0.44(syst)±0.16(ext)]%. In addition, using the ?c0??-p+ decay channel, the ?c0 baryon mass is measured to be M(?c0)=2695.28±0.07(stat)±0.27(syst)±0.30(ext) MeV, improving the precision of the previous world average by a factor of 4.

AB - The first observation of the singly Cabibbo-suppressed ?c0??-K+ and ?c0??-p+ decays is reported, using proton-proton collision data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb-1, collected with the LHCb detector between 2016 and 2018. The branching fraction ratios are measured to be B(?c0??-K+)B(?c0??-p+)=[6.08±0.51(stat)±0.40(syst)]%,B(?c0??-p+)B(?c0??-p+)=[15.81±0.87(stat)±0.44(syst)±0.16(ext)]%. In addition, using the ?c0??-p+ decay channel, the ?c0 baryon mass is measured to be M(?c0)=2695.28±0.07(stat)±0.27(syst)±0.30(ext) MeV, improving the precision of the previous world average by a factor of 4.

U2 - 10.1103/PhysRevLett.132.081802

DO - 10.1103/PhysRevLett.132.081802

M3 - Article

SN - 0031-9007

VL - 132

JO - Physical Review Letters

JF - Physical Review Letters

IS - 8

M1 - 081802

ER -

Observation of Cabibbo-Suppressed Two-Body Hadronic Decays and Precision Mass Measurement of the ?c0 Baryon

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