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).

A measurement of the gluon splitting rate into b(b)over-bar pairs in hadronic Z decays / Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Lees, J.p., Lucotte, A., Merle, E., Minard, M.n., Nief, J.y., Pietrzyk, B., Alemany, R., Boix, G., Casado, M.p., Chmeissani, M., Crespo, J.m., Delfino, M., Fernandez, E., Fernandez Bosman, M., Garrido, L., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 434:3-4(1998), pp. 437-450. [10.1016/S0370-2693(98)00850-8]

A measurement of the gluon splitting rate into b(b)over-bar pairs in hadronic Z decays

CREANZA, Donato Maria;IASELLI, Giuseppe;MAGGI, Giorgio Pietro;
1998

Abstract

A measurement of the fraction of hadronic Z decays in which a, gluon splits into a b (b) over bar pair, g(), 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() = (2.77 +/- 0.42(stat) +/- 0.57(syst)) x 10(-3).
1998
A measurement of the gluon splitting rate into b(b)over-bar pairs in hadronic Z decays / Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Lees, J.p., Lucotte, A., Merle, E., Minard, M.n., Nief, J.y., Pietrzyk, B., Alemany, R., Boix, G., Casado, M.p., Chmeissani, M., Crespo, J.m., Delfino, M., Fernandez, E., Fernandez Bosman, M., Garrido, L., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 434:3-4(1998), pp. 437-450. [10.1016/S0370-2693(98)00850-8]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/3531
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