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(*)pi final states. The sum of the branching ratios for these processes is measured to be Br((B) over bar --> D pi l(-)(v) over bar) + Br((B) over bar --> D*pi l(-)(v) over bar)= (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.

D., B., I., D., D., D., P., G., C., G., J. P., L., 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

CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
1997-01-01

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(*)pi final states. The sum of the branching ratios for these processes is measured to be Br((B) over bar --> D pi l(-)(v) over bar) + Br((B) over bar --> D*pi l(-)(v) over bar)= (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.
1997
D., B., I., D., D., D., P., G., C., G., J. P., L., 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/11365/38670
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