Using a sample of about 1.46 million hadronic Z decays collected between 1991 and 1993 with the ALEPH detector at LEP, the energy distribution of the B-0 and B+/- mesons produced at the Z resonance is measured by reconstructing semileptonic decays B -> l nu(l)D(X) or B -> l nu(l)D*(+)(X). The charmed mesons are reconstructed through the decay modes D-0 -> K(-)pi(+), D-0 -> K(-)pi(+)pi(-)pi(+),D+ -> K(-)pi(+)pi(+), and D*(+) -> D-0 pi(+). The neutrino energy is estimated from the missing energy in the lepton hemisphere. Accounting for B* and B** production, the shape of the scaled energy distribution x(E)((b)) for mesons containing a b quark is compared to the predictions of different fragmentation models. The mean value of x(E)((b)) is found to be = 0.715 +/- 0.007(stat) +/- 0.013(syst).

D., B., D., C., I., D., D., D., P., G., C., G., et al. (1995). Measurement of the Effective b quark Fragmentation Function At the Z resonance. PHYSICS LETTERS. SECTION B, 357(4), 699-714 [10.1016/0370-2693(95)00988-W].

Measurement of the Effective b quark Fragmentation Function At the Z resonance

CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
1995-01-01

Abstract

Using a sample of about 1.46 million hadronic Z decays collected between 1991 and 1993 with the ALEPH detector at LEP, the energy distribution of the B-0 and B+/- mesons produced at the Z resonance is measured by reconstructing semileptonic decays B -> l nu(l)D(X) or B -> l nu(l)D*(+)(X). The charmed mesons are reconstructed through the decay modes D-0 -> K(-)pi(+), D-0 -> K(-)pi(+)pi(-)pi(+),D+ -> K(-)pi(+)pi(+), and D*(+) -> D-0 pi(+). The neutrino energy is estimated from the missing energy in the lepton hemisphere. Accounting for B* and B** production, the shape of the scaled energy distribution x(E)((b)) for mesons containing a b quark is compared to the predictions of different fragmentation models. The mean value of x(E)((b)) is found to be = 0.715 +/- 0.007(stat) +/- 0.013(syst).
1995
D., B., D., C., I., D., D., D., P., G., C., G., et al. (1995). Measurement of the Effective b quark Fragmentation Function At the Z resonance. PHYSICS LETTERS. SECTION B, 357(4), 699-714 [10.1016/0370-2693(95)00988-W].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/37576
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