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A MEASUREMENT OF A(FB)(B) IN LIFETIME TAGGED HEAVY FLAVOR Z DECAYS

BUSKULIC, D; CASPER, D; DEBONIS, I; DECAMP, D; GHEZ, P; GOY, C; ... ZOBERNIG, G; + view all (1994) A MEASUREMENT OF A(FB)(B) IN LIFETIME TAGGED HEAVY FLAVOR Z DECAYS. PHYS LETT B , 335 (1) 99 - 108.

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Abstract

A new measurement of the forward-backward asymmetry in Z --> bbBAR 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 sin2theta(w)eff, which is determined to be 0.2315 +/- 0.0016 (stat.) +/- 0.0009 (syst.), corresponding to an A(FB)b of 0.00992 +/- 0.0084 (stat.) +/- 0.0046 (stat.).

Type:Article
Title:A MEASUREMENT OF A(FB)(B) IN LIFETIME TAGGED HEAVY FLAVOR Z DECAYS
Keywords:FORWARD-BACKWARD ASYMMETRY, LUND MONTE-CARLO, JET FRAGMENTATION, -> B(B)OVER-BAR, E+E-PHYSICS, C(C)OVER-BAR
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy

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