A new measurement of the forward-backward asymmetry in Z--> bb decays is presented. Hadrons from b decays are tagged using their long lifetimes. The b quark charge and direction are reconstructed with a hemisphere charge algorithm. The asymmetry and reconstructed b hemisphere charge are measured in the 69 pb-1 of data collected by ALEPH during 1991, 1992 and 1993. They are used to extract sin2θWeff, which is determined to be 0.2315 +/- 0.0016 (stat.) +/- 0.0009 (syst.), corresponding to an AFBb of 0.0992 +/- 0.0084 (stat.) +/- 0.0046 (syst.).
Titolo: | A measurement of AFBb in lifetime tagged heavy flavour Z decays |
Autori: | |
Data di pubblicazione: | 1994 |
Rivista: | |
Abstract: | A new measurement of the forward-backward asymmetry in Z--> bb decays is presented. Hadrons from b decays are tagged using their long lifetimes. The b quark charge and direction are reconstructed with a hemisphere charge algorithm. The asymmetry and reconstructed b hemisphere charge are measured in the 69 pb-1 of data collected by ALEPH during 1991, 1992 and 1993. They are used to extract sin2θWeff, which is determined to be 0.2315 +/- 0.0016 (stat.) +/- 0.0009 (syst.), corresponding to an AFBb of 0.0992 +/- 0.0084 (stat.) +/- 0.0046 (syst.). |
Handle: | http://hdl.handle.net/11368/2563401 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/0370-2693(94)91564-4 |
Appare nelle tipologie: | 1.1 Articolo in Rivista |
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.