HAL: hal-00718916, version 1

arXiv: 1207.4004

DOI: 10.1016/j.nuclphysb.2012.11.016

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Nuclear Physics B 868, 2 (2012) 368-382

Impact of on the New Physics search in B→K⁎ℓ+ℓ− decay

Damir Becirevic1, Andrey Tayduganov1, 2

(2012)

We discuss the uncertainty related to the amount of unwanted $B\to K_0^\ast (K\pi)\ell^+\ell^-$ events in the sample of $B\to K^\ast (K\pi)\ell^+\ell^-$. Those events can increase the measured differential decay rate by up to 10% in the low $q^2$ region, and can be a source of non-negligible uncertainty in the full angular distribution of the $B\to K^\ast (K\pi)\ell^+\ell^-$ decay. Although the transverse asymmetries should be unaffected by the presence of the $S$-wave $K\pi$ pairs, coming from the scalar $K_0^\ast$ meson, we show that in practice their normalization is sensitive to the those events and can entail a sizable uncertainty in transverse asymmetries around $q^2=2$ GeV. For other $q^2$'s that error is under about 10%.

1:	LPT - Laboratoire de Physique Théorique d'Orsay
2:	LAL - Laboratoire de l'Accélérateur Linéaire

Research team: Groupe Théorie

Subject

:

Physics/High Energy Physics - Experiment Physics/High Energy Physics - Phenomenology

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From: Patricia Dubois-Violette <>

Submitted on: Wednesday, 18 July 2012 14:58:00

Updated on: Friday, 14 December 2012 10:23:53