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  chi(c1) and chi(c2) Resonance Parameters with the Decays chi(c1,c2) -> J/psi mu(+)mu(-)

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2017). chi(c1) and chi(c2) Resonance Parameters with the Decays chi(c1,c2) -> J/psi mu(+)mu(-). Physical Review Letters, 119(22): 221801. doi:10.1103/PhysRevLett.119.221801.

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Aaij, R.1, Author
Adeva, B.1, Author
Adinolfi, M.1, Author
Ajaltouni, Z.1, Author
Akar, S.1, Author
Albrecht, J.1, Author
Alessio, F.1, Author
Alexander, M.1, Author
Alfonso Albero, A.1, Author
Ali, S.1, Author
Alkhazov, G.1, Author
Cartelle, P. Alvarez1, Author
Alves Jr., A. A.1, Author
Amato, S.1, Author
Amerio, S.1, Author
Amhis, Y.1, Author
An, L.1, Author
Anderlini, L.1, Author
Andreassi, G.1, Author
Andreotti, M.1, Author
more..
Affiliations:
1external, ou_persistent22              
2Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society, ou_904550              

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 MPINP: LHCb - Abteilung Hofmann
 Abstract: The decays chi(c1) -> J/psi mu(+)mu(-) and chi(c1) -> J/psi mu(+)mu(-) are observed and used to study the resonance parameters of the chi(c1) and chi(c2) mesons. The masses of these states are measured to be m(chi(c1)) = 3510.71 +/- 0.04(stat) +/- 0.09(syst) MeV and m(chi(c2)) = 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(chi(c2)) - m(chi(c1)) = 45.39 +/- 0.07(stat) +/- 0.03(syst) MeV. The natural width of the chi(c2) meson is measured to be Gamma(chi(c2)) = 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.

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 Dates: 2017
 Publication Status: Published online
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 Identifiers: DOI: 10.1103/PhysRevLett.119.221801
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 119 (22) Sequence Number: 221801 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1