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From a study of the kinematic properties of the final state produced in the semileptonic decays b --> Xlv(l), the inclusive charmless semileptonic branching ratio of b hadrons is measured. With a sample of 3.6 million hadronic Z decays recorded between 1992 and 1995 with the ALEPH detector at LEP, the value Br(b --> X(u)lv(l)) is determined to be (1.73 +/- 0.55(stat) +/- 0.55(syst)) x 10(-3), where X(u) represents any charmless hadronic state and b is a mixture of b hadrons weighted by their production rates. This measurement yields the result |V-ub|(2) = (18.68 +/- 5.94(stat) +/- 5.94(syst) +/- 1.45(HQE)) x 10(-6) where the last error comes from the conversion of the branching ratio to the CKM matrix element squared.

R., B., D., B., D., D., P., G., C., G., J. P., L., et al. (1999). Determination of |V-ub| from the measurement of the inclusive charmless semileptonic branching ratio of b hadrons. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 6(4), 555-574 [10.1007/s100520050366].

Determination of |V-ub| from the measurement of the inclusive charmless semileptonic branching ratio of b hadrons

CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
1999-01-01

Abstract

From a study of the kinematic properties of the final state produced in the semileptonic decays b --> Xlv(l), the inclusive charmless semileptonic branching ratio of b hadrons is measured. With a sample of 3.6 million hadronic Z decays recorded between 1992 and 1995 with the ALEPH detector at LEP, the value Br(b --> X(u)lv(l)) is determined to be (1.73 +/- 0.55(stat) +/- 0.55(syst)) x 10(-3), where X(u) represents any charmless hadronic state and b is a mixture of b hadrons weighted by their production rates. This measurement yields the result |V-ub|(2) = (18.68 +/- 5.94(stat) +/- 5.94(syst) +/- 1.45(HQE)) x 10(-6) where the last error comes from the conversion of the branching ratio to the CKM matrix element squared.
1999
THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
R., B., D., B., D., D., P., G., C., G., J. P., L., et al. (1999). Determination of |V-ub| from the measurement of the inclusive charmless semileptonic branching ratio of b hadrons. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 6(4), 555-574 [10.1007/s100520050366].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/37908
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