Probing for New Physics in Polarized Lambda(sub b) Decays at the Z

摘要

Polarized Lambda (sub beta) Lambda (sub gamma) decays at the Z pole are shown tobe well suited for probing a large variety of New Physics effects. A new observable is proposed, the angular asymmetry between the Lambda (sub beta) spin and photon momentum, which is sensitive to the relative strengths of the opposite chirality and Standard Model chirality b s gamma a dipole operators. Combination with the Lambda (sub gamma) polarization asymmetry and comparison with the Lambda (sub beta) polarization extracted from semileptonic decays allows important tests