From 1.4 million hadronic Z decays collected by the ALEPH detector at LEP, an enriched sample of Z -> c cbar events is extracted by requiring the presence of a high momentum D*(+/-). The charm quark forward-backward charge asymmetry at the Z pole is measured to be A(FB)(0,c) = (8.0 +/- 2.4)% corresponding to an effective electroweak mixing angle of sin^2( theta(W)(eff)) = 0.2302 +/- 0.0054.
The forward-backward asymmetry for charm quarks at the Z-pole
BATIGNANI, GIOVANNI;BETTARINI, STEFANO;CIOCCI, MARIA AGNESE;FERRANTE, ISIDORO;FORTI, FRANCESCO;GIORGI, MARCELLO;MESSINEO, ALBERTO MARIA;RIZZO, GIULIANA;TONELLI, GUIDO EMILIO;G. TRIGGIANI;
1995-01-01
Abstract
From 1.4 million hadronic Z decays collected by the ALEPH detector at LEP, an enriched sample of Z -> c cbar events is extracted by requiring the presence of a high momentum D*(+/-). The charm quark forward-backward charge asymmetry at the Z pole is measured to be A(FB)(0,c) = (8.0 +/- 2.4)% corresponding to an effective electroweak mixing angle of sin^2( theta(W)(eff)) = 0.2302 +/- 0.0054.File in questo prodotto:
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