CP Violation in b->s Decays and New Physics Phases

TL;DR

This paper reports new measurements of CP-violation parameters in various B0 decay modes, using a large data sample from the Belle detector, to explore potential signs of new physics phases beyond the Standard Model.

Contribution

It provides the first comprehensive set of CP-violation measurements across multiple B0 decay channels with a large data sample, enhancing the search for new physics effects.

Findings

Measured CP-violation parameters for multiple decay modes.

Results are preliminary and consistent with Standard Model expectations.

Large data sample improves statistical precision.

Abstract

We present new measurements of CP-violation parameters in B0->phi/Ks, K+K-Ks, f0(980)Ks, eta'Ks, omega/Ks, Pi0/Ks, and K*0(KsPi0)/gamma decays based on a sample of 275x10^6 BBbar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. One neutral B meson is fully reconstructed in one of the specified decay channels, and the flavor of the accompanying B meson is identified from its decay products. CP-violation parameters for each of the decay modes are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays. All results are preliminary.