A sample of 3.6 million hadronic Z decays recorded between 1991 and 1995 with the ALEPH detector at LEP is used to investigate semileptonic decays of B mesons into final states involving orbitally excited charm mesons. Topological vertex criteria are used to search for decays involving narrow D** states as well as wide D** resonances and non-resonant D(*)π final states. The sum of the branching ratios for these processes is measured to be Br(B→ → Dπℓ-ν̄) + Br(B→ → D*πℓ-ν̄) = (2.26 ± 0.29(stat) ± 0.33(syst))%, which accounts for a significant fraction of the deficit between inclusive measurements and the sum of exclusive semileptonic B decay modes.

Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1997). Production of orbitally excited charm mesons in semileptonic B decays. ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS, 73(4), 601-612 [10.1007/s002880050351].

Production of orbitally excited charm mesons in semileptonic B decays

CARPINELLI, Massimo;
1997

Abstract

A sample of 3.6 million hadronic Z decays recorded between 1991 and 1995 with the ALEPH detector at LEP is used to investigate semileptonic decays of B mesons into final states involving orbitally excited charm mesons. Topological vertex criteria are used to search for decays involving narrow D** states as well as wide D** resonances and non-resonant D(*)π final states. The sum of the branching ratios for these processes is measured to be Br(B→ → Dπℓ-ν̄) + Br(B→ → D*πℓ-ν̄) = (2.26 ± 0.29(stat) ± 0.33(syst))%, which accounts for a significant fraction of the deficit between inclusive measurements and the sum of exclusive semileptonic B decay modes.
Articolo in rivista - Articolo scientifico
Physics
English
601
612
12
Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1997). Production of orbitally excited charm mesons in semileptonic B decays. ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS, 73(4), 601-612 [10.1007/s002880050351].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390138
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