$B \to K_1(1270) (\to ρK) \ell^+ \ell^-$ in LEET

Details $B \to K_1(1270) (\to ρK) \ell^+ \ell^-$ in LEET $B \to K_1(1270) (\to ρK) \ell^+ \ell^-$ in LEET

2007-07-03

arxiv.org/abs/0707.0446v1

Eur.Phys.J.C58:251-259,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 4 figures

Scientific paper

10.1140/epjc/s10052-008-0752-x

Flavour Changing Neutral Current decays of the $B$-meson are a very useful tool for studying possible physics scenarios beyond the Standard Model (SM), where of the many FCNC modes radiative, purely leptonic and semi-leptonic decays of the $B$-meson are relatively clean tests. Within this context the BELLE collaboration has searched for the $B \to K_1(1270) \gamma$ process and provided an upper bound on this decay. In this work we have used this upper bound in studying the angular coorelations for the related semi-leptonic decay mode $B \to K_1(1270) (\to \rho K) \ell^+ \ell^-$, where we have used the form factors that have already been estimated for the $B \to K_1(1270) \gamma$ mode. Note that the additional form factors that are required were calculated using the Large Energy Effective Theory (LEET).

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