Evidence of a J/ψ KS0 Structure in B0 →j/ψφKS0 Decays

LHCb Collaboration

doi:10.1103/PhysRevLett.131.131901

Evidence of a J/ψ K_S⁰ Structure in B⁰ →j/ψφK_S⁰ Decays

LHCb Collaboration

Physics and Astronomy

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

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Abstract

An amplitude analysis of B⁰→J/ψφK_S⁰ decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 9 fb^-1, collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. Evidence with a significance of 4.0 standard deviations of a structure in the J/ψK_S⁰ system, named T_ψs1^θ(4000)⁰, is seen, with its mass and width measured to be 3991_-10⁺¹²_-17⁺⁹ MeV/c² and 105_-25⁺²⁹ _-23⁺¹⁷ MeV, respectively, where the first uncertainty is statistical and the second systematic. The T_ψs1^θ(4000)⁰ state is likely to be the isospin partner of the T_ψs1^θ(4000)⁺ state, previously observed in the J/ψK⁺system of the B⁺→J/ψφK⁺ decay. When isospin symmetry for the charged and neutral T_ψs1^θ(4000) states is assumed, the signal significance increases to 5.4 standard deviations.

Original language	English
Article number	131901
Number of pages	11
Journal	Physical Review Letters
Volume	131
Issue number	13
Early online date	26 Sept 2023
DOIs	https://doi.org/10.1103/PhysRevLett.131.131901
Publication status	Published - 29 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 Science and Technology 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., for the LHCb Collaboration. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

ASJC Scopus subject areas

General Physics and Astronomy

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Cite this

@article{7eb769c03169491d9c2897c9bab9e093,

title = "Evidence of a J/ψ KS0 Structure in B0 →j/ψφKS0 Decays",

abstract = "An amplitude analysis of B0→J/ψφKS0 decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 9 fb-1, collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. Evidence with a significance of 4.0 standard deviations of a structure in the J/ψKS0 system, named Tψs1θ(4000)0, is seen, with its mass and width measured to be 3991-10+12 -17+9 MeV/c2 and 105-25+29 -23+17 MeV, respectively, where the first uncertainty is statistical and the second systematic. The Tψs1θ(4000)0 state is likely to be the isospin partner of the Tψs1θ(4000)+ state, previously observed in the J/ψK+ system of the B+→J/ψφK+ decay. When isospin symmetry for the charged and neutral Tψs1θ(4000) states is assumed, the signal significance increases to 5.4 standard deviations.",

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 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 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 {Bachiller Perea}, I. 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 Science and Technology 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., for the LHCb Collaboration. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",

year = "2023",

month = sep,

day = "29",

doi = "10.1103/PhysRevLett.131.131901",

language = "English",

volume = "131",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

number = "13",

}

TY - JOUR

T1 - Evidence of a J/ψ KS0 Structure in B0 →j/ψφKS0 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 - 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 - 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 - Bachiller Perea, I.

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 Science and Technology 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., for the LHCb Collaboration. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2023/9/29

Y1 - 2023/9/29

N2 - An amplitude analysis of B0→J/ψφKS0 decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 9 fb-1, collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. Evidence with a significance of 4.0 standard deviations of a structure in the J/ψKS0 system, named Tψs1θ(4000)0, is seen, with its mass and width measured to be 3991-10+12 -17+9 MeV/c2 and 105-25+29 -23+17 MeV, respectively, where the first uncertainty is statistical and the second systematic. The Tψs1θ(4000)0 state is likely to be the isospin partner of the Tψs1θ(4000)+ state, previously observed in the J/ψK+ system of the B+→J/ψφK+ decay. When isospin symmetry for the charged and neutral Tψs1θ(4000) states is assumed, the signal significance increases to 5.4 standard deviations.

AB - An amplitude analysis of B0→J/ψφKS0 decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 9 fb-1, collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. Evidence with a significance of 4.0 standard deviations of a structure in the J/ψKS0 system, named Tψs1θ(4000)0, is seen, with its mass and width measured to be 3991-10+12 -17+9 MeV/c2 and 105-25+29 -23+17 MeV, respectively, where the first uncertainty is statistical and the second systematic. The Tψs1θ(4000)0 state is likely to be the isospin partner of the Tψs1θ(4000)+ state, previously observed in the J/ψK+ system of the B+→J/ψφK+ decay. When isospin symmetry for the charged and neutral Tψs1θ(4000) states is assumed, the signal significance increases to 5.4 standard deviations.

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U2 - 10.1103/PhysRevLett.131.131901

DO - 10.1103/PhysRevLett.131.131901

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AN - SCOPUS:85174751453

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JO - Physical Review Letters

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M1 - 131901

ER -