The Riddle of Polarization in $B \to VV$ Transitions

Details The Riddle of Polarization in $B \to VV$ Transitions The Riddle of Polarization in $B \to VV$ Transitions

2004-06-15

arxiv.org/abs/hep-ph/0406162v1

Phys.Lett. B597 (2004) 291-298

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex, 14 pages, 3 figures

Scientific paper

10.1016/j.physletb.2004.07.024

Measurements of polarization fractions in $B \to VV$ transitions, with $V$ a light vector meson, show that the longitudinal amplitude dominates in $B^0 \to \rho^+ \rho^-$, $B^+ \to \rho^+ \rho^0$, and $B^+ \to \rho^0 K^{*+}$ decays and not in the penguin induced decays $B^0 \to \phi K^{*0}$, $B^+ \to \phi K^{*+}$. We study the effect of rescattering mediated by charmed resonances, finding that in $B \to \phi K^*$ it can be responsible of the suppression of the longitudinal amplitude. For the decay $B \to \rho K^*$ we find that the longitudinal fraction cannot be too large without invoking new effects.

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