P-odd observables at the peak
J. Bernabéu1 - F.J. Botella1,2 - O. Vives1,2
1 Departament de Física Teòrica, Universitat de València, Spain
2 I.F.I.C. (Centre Mixte Universitat de València-C.S.I.C.), E-46100 Burjassot, València, Spain
Received: 14 April 1998 / Revised version: 25 August 1998 / Published online: 3 December 1998
We study the -Z interference in the process as a means to measure the neutral current coupling of the b-quark. The helicity amplitudes are calculated from resonant and background diagrams and the spin density matrix of the final state is discussed. The spin analyzer of the 's is illustrated with the decays and . With a sensitivity to gVb of a few per cent could be reachable.