A measurement of the gluon splitting rate into c anti-c pairs in hadronic Z decays

Heister, A.; Schael, S.; Barate, R.; Bruneliere, R.; De Bonis, I.; Decamp, D.; Goy, C.; Jezequel, S.; Lees, J.P.; Martin, F.

doi:10.1016/S0370-2693(03)00495-7

A measurement of the gluon splitting rate into c anti-c pairs in hadronic Z decays

ALEPH

Collaboration

2003

12 pages

Published in:

Phys.Lett.B 561 (2003) 213-224

e-Print:

hep-ex/0302003 [hep-ex]

DOI:

10.1016/S0370-2693(03)00495-7

Report number:

CERN-EP-2003-003

Experiments:

CERN-LEP-ALEPH

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Abstract:

The rate of gluons splitting into

c \bar{c}

pairs in hadronic

Z

decays is measured using the data sample collected by ALEPH from 1991 to 1995. The selection is based on the identification of leptons (electrons and muons) originating from semileptonic charm decays, and on the topological properties of signal events. The result derived from the selected sample is

g_{c \bar{c}}=(3.26 \pm 0.23 \rm{(stat)} \pm 0.42 \rm{(syst)}) %

Note:

To be published in Phys. Lett. B Report-no: CERN-EP/2003-003 Proxy: ccsd ccsd-00000168

electron positron: colliding beams
electron positron: annihilation
Z0: electroproduction
Z0: hadronic decay
gluon: fragmentation
quark: charm
quark: pair production
quark: semileptonic decay
lepton: particle identification
ALEPH

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