We present a direct measurement of the parity-violating asymmetry A(b) in the Z(0) to <b(b)over bar> coupling using a new technique to distinguish the b and b quarks using charged kaons from B decays. The Z(0) bosons are produced in e(+)e(-) collisions at the SLC with longitudinally polarized electrons. <b(b)over bar> events are selected using a secondary vertex mass tag and Ab is determined from the left-right forward-backward asymmetry. From the 1994-1995 data sample, selected from 100 000 hadronic Z(0) decays, we obtain A(b) = 0.855 +/- 0.088(stat) +/- 0.102(syst).
Direct measurement of A(b) in Z(0) decays using charged kaon tagging
BISELLO, DARIO;
1999
Abstract
We present a direct measurement of the parity-violating asymmetry A(b) in the Z(0) to coupling using a new technique to distinguish the b and b quarks using charged kaons from B decays. The Z(0) bosons are produced in e(+)e(-) collisions at the SLC with longitudinally polarized electrons. events are selected using a secondary vertex mass tag and Ab is determined from the left-right forward-backward asymmetry. From the 1994-1995 data sample, selected from 100 000 hadronic Z(0) decays, we obtain A(b) = 0.855 +/- 0.088(stat) +/- 0.102(syst).File in questo prodotto:
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