Experimental evidence for the existence of orbitally excited B meson states is presented in an analysis of the Bπ and B*π distribution of Q = m(B**) - m(B(*)) - m(π) using Z0decay data taken with the DELPHI detector at LEP. The mean Q-value of the decays B**→ B(*)π is measured to be 284 ± 5 (stat.) ± 15 (syst.) MeV/c2, and the Gaussian width of the signal is 79 ± 5 (stat.) ± 8 (syst.) MeV/c2. This signal can be described as a single resonance of mass m = 5732 ± 5 (stat.) ± 20 (syst.) MeV/c2and full width Γ = 145 ± 28 MeV/c2. The observed shape is also consistent with the production of several broad and narrow states as predicted by the quark model and partly observed in the D-meson sector. The production rate of B**per b-jet is found to be 0.27 ± 0.02 (stat.) ± 0.06 (syst.). © 1995.

Abreu, P., Adam, W., Adye, T., Agasi, E., Ajinenko, I., Aleksan, R., et al. (1995). Observation of orbitally excited B mesons. PHYSICS LETTERS. SECTION B, 345(4), 598-608 [10.1016/0370-2693(94)01696-A].

Observation of orbitally excited B mesons

Calvi, M.;Paganoni, M.;Ragazzi, S.;Tabarelli, T.;
1995

Abstract

Experimental evidence for the existence of orbitally excited B meson states is presented in an analysis of the Bπ and B*π distribution of Q = m(B**) - m(B(*)) - m(π) using Z0decay data taken with the DELPHI detector at LEP. The mean Q-value of the decays B**→ B(*)π is measured to be 284 ± 5 (stat.) ± 15 (syst.) MeV/c2, and the Gaussian width of the signal is 79 ± 5 (stat.) ± 8 (syst.) MeV/c2. This signal can be described as a single resonance of mass m = 5732 ± 5 (stat.) ± 20 (syst.) MeV/c2and full width Γ = 145 ± 28 MeV/c2. The observed shape is also consistent with the production of several broad and narrow states as predicted by the quark model and partly observed in the D-meson sector. The production rate of B**per b-jet is found to be 0.27 ± 0.02 (stat.) ± 0.06 (syst.). © 1995.
Articolo in rivista - Articolo scientifico
Nuclear and High Energy Physics
English
1995
345
4
598
608
none
Abreu, P., Adam, W., Adye, T., Agasi, E., Ajinenko, I., Aleksan, R., et al. (1995). Observation of orbitally excited B mesons. PHYSICS LETTERS. SECTION B, 345(4), 598-608 [10.1016/0370-2693(94)01696-A].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/187014
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