MEASURING OF THE Z(0)BRANCHING FRACTION TO B QUARK PARIS USING THE BOOSTED SPHERICITY PRODUCT

MEASURING OF THE Z(0)BRANCHING FRACTION TO B QUARK PARIS USING THE BOOSTED SPHERICITY PRODUCT

From a sample of about 120 000 hadronic Z0 decays, using a technique based on a separation of the different event categories in the boosted sphericity product, the fraction of bb̄ decays has been measured to be 0.219 ± 0.014 (stat) ⋯ 0.019 (syst). Using the DELPHI determination of the hadronic Z0 wi...

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Bibliographic Details
Main Authors: Abreu, P, Adam, W, Adami, F, Adye, T, Akesson, T, Alekseev, G, Allen, P, Almehed, S, Alvsvaag, S, Amaldi, U, Anassontzis, E, Antilogus, P, Apel, W, Apsimon, R, Asman, B, Augustin, J, Augustinus, A, Baillon, P, Bambade, P, Barao, F, Barate, R, Barbiellini, G, Bardin, D, Baroncelli, A, Barring, O
Format: Journal article
Language:English
Published: 1992
Description
Summary:From a sample of about 120 000 hadronic Z0 decays, using a technique based on a separation of the different event categories in the boosted sphericity product, the fraction of bb̄ decays has been measured to be 0.219 ± 0.014 (stat) ⋯ 0.019 (syst). Using the DELPHI determination of the hadronic Z0 width, this corresponds to a partial width Γbb- = 378 ± 42 MeV (in good agreement with the standard model prediction of ≃ 380 MeV). Combining this measurement with the determinations based on events with high pt leptons gives an estimate for the branching ratio of b into leptons at LEP of (11.2 ± 1.2)%, consistent with previous determinations.

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