Probing photon helicity in radiative B decays via charmonium resonance interference

Abstract

We investigate a new method to probe the helicity of the photon emitted in the b -> s gamma transition. The method relies on the observation of interference effects between two resonance contributions, B -> K*(K gamma) gamma and B -> eta_c(gamma gamma) K or B -> chi_c0(gamma gamma) K to the same final state K gamma gamma. Decays of the type B -> K_res(K gamma) gamma dominate the B -> K gamma gamma yield throughout most of the phase space, and may be accessible at current B meson facilities already.

elsart, 11 pages, 4 figures; added comments on strong phase (final version Phys. Lett. B)

References in corpus (6)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• The photon polarization in B -> X gamma in the standard model
• Observation of B+ --> K1(1270)+ gamma
• Measurement of the B0 -> K2*(1430)0 gamma and B+ -> K2*(1430)+ gamma branching fractions
• Predictions for $B\to K\gamma \gamma$ decays
• Search for Factorization-Suppressed B -> chi_c K(*) Decays

Cited by in corpus (3)

• Time-dependent CP Asymmetry in B->K* gamma as a (Quasi) Null Test of the Standard Model
• Photon helicity in Lambda_b --> p K gamma decays
• Search for Resonant $B^{\pm }\to K^{\pm }h\to K^{\pm }\gamma \gamma$ Decays at Belle