# $B \to K_1(1270) (\to \rho K) \ell^+ \ell^-$ in LEET

Abstract : 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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Journal articles
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http://hal.in2p3.fr/in2p3-00170283
Contributor : Dominique Girod <>
Submitted on : Friday, September 7, 2007 - 10:22:39 AM
Last modification on : Tuesday, November 19, 2019 - 2:38:14 AM

### Citation

S. Rai Choudhury, A.S. Cornell, Naveen Gaur. $B \to K_1(1270) (\to \rho K) \ell^+ \ell^-$ in LEET. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2008, 58, pp.251-259. ⟨10.1140/epjc/s10052-008-0752-x⟩. ⟨in2p3-00170283⟩

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