Observables in the Decays of B to Two Vector Mesons

TL;DR

This paper discusses the nine polarization observables in B meson decays to two vector mesons, highlighting which can be measured through decay distributions and which require additional polarization measurements.

Contribution

It clarifies the number of measurable polarization observables in B to two vector meson decays and the methods needed to access all nine.

Findings

Six observables are accessible via decay angular distributions.

Three observables require spin polarization measurements.

Provides a framework for analyzing polarization correlations in B decays.

Abstract

In general there are nine observables in the decay of a B meson to two vector mesons defined in terms of polarization correlations of these mesons. Only six of these can be detected via the subsequent decay angular distributions because of parity conservation in those decays. The remaining three require the measurement of the spin polarization of one of the decay products.