Angular analysis of B -> J/psi K1 : towards a model independent determination of the photon polarization with B-> K1 gamma

TL;DR

This paper introduces a model-independent method to determine photon polarization in b->s gamma decays using angular distributions from B->K1 gamma and B->J/psi K1 channels, enhancing precision.

Contribution

It demonstrates that the hadronic information for photon polarization can be extracted more precisely via the B->J/psi K1 channel, improving upon previous methods.

Findings

Hadronic information can be obtained from B->J/psi K1 with higher precision.

The method is model-independent and applicable to both decay channels.

Enhanced accuracy in determining photon polarization in b->s gamma processes.

Abstract

We propose a model independent extraction of the hadronic information needed to determine the photon polarization of the b-> s gamma process by the method utilizing the B -> K1 gamma -> K pi pi gamma angular distribution. We show that exactly the same hadronic information can be obtained by using the B -> J/psi K1 -> J/psi K pi pi channel, which leads to a much higher precision.