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

Emi Kou (1, 2) , Alain Le Yaouanc (3) , Andrey Tayduganov (4, 5, 6)

1 LAL - Laboratoire de l'Accélérateur Linéaire
2 Groupe Théorie
3 LPT - Laboratoire de Physique Théorique d'Orsay [Orsay]
4 CPT - E1 Physique des particules
5 CPPM - Centre de Physique des Particules de Marseille
6 CPT - Centre de Physique Théorique - UMR 7332

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.

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]

Emi Kou, Alain Le Yaouanc, Andrey Tayduganov. Angular analysis of B -> J/psi K1 : towards a model independent determination of the photon polarization with B-> K1 gamma. Physics Letters B, 2016, 763, pp.66-71. ⟨10.1016/j.physletb.2016.10.013⟩. ⟨hal-01362210⟩