χc1 and χc2 Resonance Parameters with the Decays χc1,c2 →j /ψμ+μ-

R. Aaij; B. Adeva; M. Adinolfi; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; A. Alfonso Albero; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves; S. Amato; S. Amerio; Y. Amhis; L. An; L. Anderlini; G. Andreassi; M. Andreotti; J. E. Andrews; R. B. Appleby; F. Archilli; P. D'Argent; J. Arnau Romeu; A. Artamonov; M. Artuso; E. Aslanides; M. Atzeni; G. Auriemma; M. Baalouch; I. Babuschkin; S. Bachmann; W. Barter; S. Borghi; J. Brodzicka; C. Burr; L. Capriotti; S. De Capua; G. Dujany; E. Gersabeck; M. Gersabeck; L. Grillo; C. Hombach; S. Klaver; G. Lafferty; K. Maguire; A. McNab; C. Parkes; G. Sarpis; LHCb Collaboration

doi:10.1103/PhysRevLett.119.221801

χc1 and χc2 Resonance Parameters with the Decays χc1,c2 →j /ψμ+μ-

R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, A. Alfonso Albero, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, G. Andreassi, M. AndreottiJ. E. Andrews, R. B. Appleby, F. Archilli, P. D'Argent, J. Arnau Romeu, A. Artamonov, M. Artuso, E. Aslanides, M. Atzeni, G. Auriemma, M. Baalouch, I. Babuschkin, S. Bachmann, W. Barter, S. Borghi, J. Brodzicka, C. Burr, L. Capriotti, S. De Capua, G. Dujany, E. Gersabeck, M. Gersabeck, L. Grillo, C. Hombach, S. Klaver, G. Lafferty, K. Maguire, A. McNab, C. Parkes, G. Sarpis, LHCb Collaboration

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Abstract

The decays χc1→J/ψμ+μ- and χc2→J/ψμ+μ- are observed and used to study the resonance parameters of the χc1 and χc2 mesons. The masses of these states are measured to be m(χc1)=3510.71±0.04(stat)±0.09(syst) MeV and m(χc2)=3556.10±0.06(stat)±0.11(syst) MeV, where the knowledge of the momentum scale for charged particles dominates the systematic uncertainty. The momentum-scale uncertainties largely cancel in the mass difference m(χc2)-m(χc1)=45.39±0.07(stat)±0.03(syst) MeV. The natural width of the χc2 meson is measured to be Γ(χc2)=2.10±0.20(stat)±0.02(syst) MeV. These results are in good agreement with and have comparable precision to the current world averages.

Original language	English
Article number	221801
Journal	Physical Review Letters
Volume	119
Issue number	22
Early online date	28 Nov 2017
DOIs	https://doi.org/10.1103/PhysRevLett.119.221801
Publication status	Published - 1 Dec 2017

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Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., ... LHCb Collaboration (2017). χc1 and χc2 Resonance Parameters with the Decays χc1,c2 →j /ψμ+μ-. Physical Review Letters, 119(22), Article 221801. https://doi.org/10.1103/PhysRevLett.119.221801

@article{70ba561c678f48a4bd888cb3b35d212f,

title = "χc1 and χc2 Resonance Parameters with the Decays χc1,c2 →j /ψμ+μ-",

abstract = "The decays χc1→J/ψμ+μ- and χc2→J/ψμ+μ- are observed and used to study the resonance parameters of the χc1 and χc2 mesons. The masses of these states are measured to be m(χc1)=3510.71±0.04(stat)±0.09(syst) MeV and m(χc2)=3556.10±0.06(stat)±0.11(syst) MeV, where the knowledge of the momentum scale for charged particles dominates the systematic uncertainty. The momentum-scale uncertainties largely cancel in the mass difference m(χc2)-m(χc1)=45.39±0.07(stat)±0.03(syst) MeV. The natural width of the χc2 meson is measured to be Γ(χc2)=2.10±0.20(stat)±0.02(syst) MeV. These results are in good agreement with and have comparable precision to the current world averages.",

author = "R. Aaij and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. and S. Ali and G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and F. Archilli and P. D'Argent and {Arnau Romeu}, J. and A. Artamonov and M. Artuso and E. Aslanides and M. Atzeni and G. Auriemma and M. Baalouch and I. Babuschkin and S. Bachmann and W. Barter and S. Borghi and J. Brodzicka and C. Burr and L. Capriotti and {De Capua}, S. and G. Dujany and E. Gersabeck and M. Gersabeck and L. Grillo and C. Hombach and S. Klaver and G. Lafferty and K. Maguire and A. McNab and C. Parkes and G. Sarpis and {LHCb Collaboration}",

year = "2017",

month = dec,

day = "1",

doi = "10.1103/PhysRevLett.119.221801",

language = "English",

volume = "119",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "22",

}

Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreotti, M, Andrews, JE, Appleby, RB, Archilli, F, D'Argent, P, Arnau Romeu, J, Artamonov, A, Artuso, M, Aslanides, E, Atzeni, M, Auriemma, G, Baalouch, M, Babuschkin, I, Bachmann, S, Barter, W, Borghi, S, Brodzicka, J, Burr, C, Capriotti, L, De Capua, S, Dujany, G, Gersabeck, E , Gersabeck, M, Grillo, L, Hombach, C, Klaver, S, Lafferty, G, Maguire, K, McNab, A, Parkes, C, Sarpis, G & LHCb Collaboration 2017, 'χc1 and χc2 Resonance Parameters with the Decays χc1,c2 →j /ψμ+μ-', Physical Review Letters, vol. 119, no. 22, 221801. https://doi.org/10.1103/PhysRevLett.119.221801

TY - JOUR

T1 - χc1 and χc2 Resonance Parameters with the Decays χc1,c2 →j /ψμ+μ-

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Ali, S.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Archilli, F.

AU - D'Argent, P.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Babuschkin, I.

AU - Bachmann, S.

AU - Barter, W.

AU - Borghi, S.

AU - Brodzicka, J.

AU - Burr, C.

AU - Capriotti, L.

AU - De Capua, S.

AU - Dujany, G.

AU - Gersabeck, E.

AU - Gersabeck, M.

AU - Grillo, L.

AU - Hombach, C.

AU - Klaver, S.

AU - Lafferty, G.

AU - Maguire, K.

AU - McNab, A.

AU - Parkes, C.

AU - Sarpis, G.

AU - LHCb Collaboration

PY - 2017/12/1

Y1 - 2017/12/1

N2 - The decays χc1→J/ψμ+μ- and χc2→J/ψμ+μ- are observed and used to study the resonance parameters of the χc1 and χc2 mesons. The masses of these states are measured to be m(χc1)=3510.71±0.04(stat)±0.09(syst) MeV and m(χc2)=3556.10±0.06(stat)±0.11(syst) MeV, where the knowledge of the momentum scale for charged particles dominates the systematic uncertainty. The momentum-scale uncertainties largely cancel in the mass difference m(χc2)-m(χc1)=45.39±0.07(stat)±0.03(syst) MeV. The natural width of the χc2 meson is measured to be Γ(χc2)=2.10±0.20(stat)±0.02(syst) MeV. These results are in good agreement with and have comparable precision to the current world averages.

AB - The decays χc1→J/ψμ+μ- and χc2→J/ψμ+μ- are observed and used to study the resonance parameters of the χc1 and χc2 mesons. The masses of these states are measured to be m(χc1)=3510.71±0.04(stat)±0.09(syst) MeV and m(χc2)=3556.10±0.06(stat)±0.11(syst) MeV, where the knowledge of the momentum scale for charged particles dominates the systematic uncertainty. The momentum-scale uncertainties largely cancel in the mass difference m(χc2)-m(χc1)=45.39±0.07(stat)±0.03(syst) MeV. The natural width of the χc2 meson is measured to be Γ(χc2)=2.10±0.20(stat)±0.02(syst) MeV. These results are in good agreement with and have comparable precision to the current world averages.

UR - http://www.scopus.com/inward/record.url?scp=85037680860&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.119.221801

DO - 10.1103/PhysRevLett.119.221801

M3 - Article

AN - SCOPUS:85037680860

SN - 0031-9007

VL - 119

JO - Physical Review Letters

JF - Physical Review Letters

IS - 22

M1 - 221801

ER -

χc1 and χc2 Resonance Parameters with the Decays χc1,c2 →j /ψμ+μ-

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