Searching for New Physics with B-Decay Fake Triple Products

TL;DR

This paper investigates the potential of triple product asymmetries in B-decays to distinguish between Standard Model and new physics explanations for polarization anomalies, providing predictions and analyzing current data.

Contribution

It introduces a method to differentiate SM and NP effects using fake triple products in B-decays, with specific predictions and analysis of experimental data.

Findings

SM predicts small fake TP's (<=9%)

Current data favors SM explanation for polarization

Provides SM predictions for Bs -> phi phi

Abstract

In pure-penguin bbar -> sbar B -> V_1 V_2 decays (V_{1,2} are vector mesons), fT/fL ~= 1 has been observed (fT (fL) is the polarization fraction of transverse (longitudinal) decays). Explanations of this unexpectedly large result have been given within the standard model (SM) and with new physics (NP). In this paper, we show that these two explanations can be partially distinguished through the triple products (TP's) in these transitions. In particular, the SM predicts one of the two fake, CP-conserving TP's to be small (|A_T^{(2)}| <= 9%), while NP often gives larger values for |A_T^{(2)}|. We discuss the implications of the measurements of both fake TP's in B -> phi K* -- the present data prefer a SM explanation of fT/fL -- and provide the SM predictions for Bs -> phi phi.