A search is performed in the invariant mass spectrum of the Bc+ π+ π− system for the excited Bc+ states Bc(2 1S0)+ and Bc(2 3S1)+ using a data sample of pp collisions collected by the LHCb experiment at the centre-of-mass energy of √s = 8 TeV, corresponding to an integrated luminosity of 2 fb^−1. No evidence is seen for either state. Upper limits on the ratios of the production cross-sections of the Bc(2 1S0)+ and Bc(2 3S1)+ states times the branching fractions of Bc(2 1S0)+ → Bc+ π+ π− and Bc(23S1)+ → Bc*+ π+ π− over the production cross-section of the Bc+ state are given as a function of their masses. They are found to be between 0.02 and 0.14 at 95% confidence level for Bc(2 1S0)+ and Bc(23S1)+ in the mass ranges [6830, 6890] MeV/c2 and [6795, 6890] MeV/c2, respectively.

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2018). Search for Excited Bc+ States. JOURNAL OF HIGH ENERGY PHYSICS, 2018(1), 0-17 [10.1007/JHEP01(2018)138].

Search for Excited Bc+ States

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Marconi, U.;Patrignani, C.;Perazzini, S.;Pisani, F.;Vagnoni, V.;Zucchelli, S.
2018

Abstract

A search is performed in the invariant mass spectrum of the Bc+ π+ π− system for the excited Bc+ states Bc(2 1S0)+ and Bc(2 3S1)+ using a data sample of pp collisions collected by the LHCb experiment at the centre-of-mass energy of √s = 8 TeV, corresponding to an integrated luminosity of 2 fb^−1. No evidence is seen for either state. Upper limits on the ratios of the production cross-sections of the Bc(2 1S0)+ and Bc(2 3S1)+ states times the branching fractions of Bc(2 1S0)+ → Bc+ π+ π− and Bc(23S1)+ → Bc*+ π+ π− over the production cross-section of the Bc+ state are given as a function of their masses. They are found to be between 0.02 and 0.14 at 95% confidence level for Bc(2 1S0)+ and Bc(23S1)+ in the mass ranges [6830, 6890] MeV/c2 and [6795, 6890] MeV/c2, respectively.
2018
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2018). Search for Excited Bc+ States. JOURNAL OF HIGH ENERGY PHYSICS, 2018(1), 0-17 [10.1007/JHEP01(2018)138].
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.; Ali, S.; Alkhazov, G.; Alvar...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/627853
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