The production fractions of charged and neutral b-hadrons in b-quark events from Z0 decays have been measured with the DELPHI detector at LEP. An algorithm has been developed, based on a neural network, to estimate the charge of the weakly-decaying b-hadron by distinguishing its decay products from particles produced at the primary vertex. From the data taken in the years 1994 and 1995, the fraction of b̄-quarks fragmenting into positively charged weakly-decaying b-hadrons has been measured to be: f+ = (42.09 ± 0.82(stat) ± 0.89(syst))%. Subtracting the rates for charged Ēb+ and Ω̄b+ baryons gives the production fraction of B+ mesons: fBu = (40.99 ± 0.82(stat) ± 1.11(syst))%. © 2003 Elsevier B.V. All rights reserved.

Abdallah, J., Abreu, P., Adam, W., Adzic, P., Albrecht, T., Alderweireld, T., et al. (2003). A measurement of the branching fractions of the b-quark into charged and neutral b-hadrons. PHYSICS LETTERS. SECTION B, 576(1-2), 29-42 [10.1016/j.physletb.2003.09.070].

A measurement of the branching fractions of the b-quark into charged and neutral b-hadrons

CALVI, MARTA;PAGANONI, MARCO;TABARELLI DE FATIS, TOMMASO;
2003

Abstract

The production fractions of charged and neutral b-hadrons in b-quark events from Z0 decays have been measured with the DELPHI detector at LEP. An algorithm has been developed, based on a neural network, to estimate the charge of the weakly-decaying b-hadron by distinguishing its decay products from particles produced at the primary vertex. From the data taken in the years 1994 and 1995, the fraction of b̄-quarks fragmenting into positively charged weakly-decaying b-hadrons has been measured to be: f+ = (42.09 ± 0.82(stat) ± 0.89(syst))%. Subtracting the rates for charged Ēb+ and Ω̄b+ baryons gives the production fraction of B+ mesons: fBu = (40.99 ± 0.82(stat) ± 1.11(syst))%. © 2003 Elsevier B.V. All rights reserved.
Articolo in rivista - Articolo scientifico
Nuclear and High Energy Physics
English
29
42
14
Abdallah, J., Abreu, P., Adam, W., Adzic, P., Albrecht, T., Alderweireld, T., et al. (2003). A measurement of the branching fractions of the b-quark into charged and neutral b-hadrons. PHYSICS LETTERS. SECTION B, 576(1-2), 29-42 [10.1016/j.physletb.2003.09.070].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/155871
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