Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Measurement of the fraction of hadronic Z decays into charm quark pairs
AU - ALEPH Collaboration, The
AU - Barate, R.
AU - Betteridge, Andrew
AU - Bowdery, Christopher
AU - Colrain, Paul
AU - Finch, Alexander
AU - Foster, Frank
AU - Hughes, Gareth
AU - Jones, Roger
AU - Williams, Mark
PY - 1998/7
Y1 - 1998/7
N2 - The full statistics of hadronic Z decays collected with the ALEPH detector are analysed to measure, by three methods, the ratio, Rc , of the partial decay width of the Z into cc¯ quarks to the total hadronic width. One method uses the inclusive p and p⊥ spectra of electrons. The other two use a double-tagging technique to measure Rc independently of the charm-tagging efficiency. In one, the tagging procedure uses the reconstruction of high momentum charmed mesons ( D∗+ , D+ and D0) to detect the charm quarks. In the other, a charm quark is tagged from the D∗ 's reconstructed in the D∗+→π+D0 decay channel and the other from the slow pion from the D∗−→π−D¯0 decay. The combination of these measurements leads to Rc=Γ(Z→cc¯)/Γ(Z→hadrons))=0.1681±0.0054(stat)±0.0062(syst) .
AB - The full statistics of hadronic Z decays collected with the ALEPH detector are analysed to measure, by three methods, the ratio, Rc , of the partial decay width of the Z into cc¯ quarks to the total hadronic width. One method uses the inclusive p and p⊥ spectra of electrons. The other two use a double-tagging technique to measure Rc independently of the charm-tagging efficiency. In one, the tagging procedure uses the reconstruction of high momentum charmed mesons ( D∗+ , D+ and D0) to detect the charm quarks. In the other, a charm quark is tagged from the D∗ 's reconstructed in the D∗+→π+D0 decay channel and the other from the slow pion from the D∗−→π−D¯0 decay. The combination of these measurements leads to Rc=Γ(Z→cc¯)/Γ(Z→hadrons))=0.1681±0.0054(stat)±0.0062(syst) .
U2 - 10.1007/s100520050228
DO - 10.1007/s100520050228
M3 - Journal article
VL - 4
SP - 557
EP - 570
JO - The European Physical Journal C (EPJ C) - Particles and Fields
JF - The European Physical Journal C (EPJ C) - Particles and Fields
SN - 1434-6052
IS - 4
ER -