The decays χ‡c1 -> J/ψ μ+μ- and χ‡c2 -> J/ψ μ+μ- are observed and used to study the resonance parameters of the χ‡c1 and χ‡‡c2 mesons. The masses of these states are measured to be m(χ‡c1)=3510.71±0.04(stat)±0.09(syst) MeV and m(‡‡χ‡‡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(χ‡‡c2)-m(χ‡‡c1)=45.39±0.07(stat)±0.03(syst) MeV. The natural width of the χ‡‡c2 meson is measured to be Γ(χ‡‡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

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2017). χc1 and χ c2 Resonance Parameters with the Decays χ c1,c2 -> J/ψ μ+μ-. PHYSICAL REVIEW LETTERS, 119(22) [10.1103/PhysRevLett.119.221801].

χc1 and χ‡c2 Resonance Parameters with the Decays χ‡c1,c2 -> J/ψ μ+μ-

Belloli, N.;Borsato, M.;Calvi, M.;Carniti, P.;Cassina, L.;Fazzini, D.;García Pardiñas, J.;Gotti, C.
;
Grillo, L.;Martinelli, M.;Matteuzzi, C.;Petruzzo, M.;
2017

Abstract

The decays χ‡c1 -> J/ψ μ+μ- and χ‡c2 -> J/ψ μ+μ- are observed and used to study the resonance parameters of the χ‡c1 and χ‡‡c2 mesons. The masses of these states are measured to be m(χ‡c1)=3510.71±0.04(stat)±0.09(syst) MeV and m(‡‡χ‡‡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(χ‡‡c2)-m(χ‡‡c1)=45.39±0.07(stat)±0.03(syst) MeV. The natural width of the χ‡‡c2 meson is measured to be Γ(χ‡‡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
Articolo in rivista - Articolo scientifico
Physics and Astronomy;ROOT-S=7 TEV; CHARMONIUM; ANNIHILATIONS; DISTRIBUTIONS; COLLISIONS; STATES; TOOL
English
2017
119
22
221801
none
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2017). χc1 and χ c2 Resonance Parameters with the Decays χ c1,c2 -> J/ψ μ+μ-. PHYSICAL REVIEW LETTERS, 119(22) [10.1103/PhysRevLett.119.221801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/181634
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