A measurement of the fraction of hadronic Z decays in which a, gluon splits into a b (b) over bar pair, g(<b(b)over bar>), is presented using data collected by ALEPH from 1992 to 1995 at the Z resonance. The selection is based on four-jet events. Events are selected by means of topological cuts and a lifetime tag. The result is g(<b(b)over bar>) = (2.77 +/- 0.42(stat) +/- 0.57(syst)) x 10(-3). (C) 1998 Elsevier Science B.V. All rights reserved.
A measurement of the gluon splitting rate into b(b)over-bar pairs in hadronic Z decays
ROLANDI, LUIGI;LIGABUE, FRANCO;LUSIANI, Alberto;
1998
Abstract
A measurement of the fraction of hadronic Z decays in which a, gluon splits into a b (b) over bar pair, g(File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
