Analysis of the lepton polarisation asymmetries of ${\bar B} \to {\bar K}_2(1430) \, \ell^+ \, \ell^-$ decay

Details Analysis of the lepton polarisation asymmetries of ${\bar B} \to {\bar K}_2(1430) \, \ell^+ \, \ell^-$ decay Analysis of the lepton polarisation asymmetries of ${\bar B} \to {\bar K}_2(1430) \, \ell^+ \, \ell^-$ decay

2011-05-30

arxiv.org/abs/1105.5901v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 10 figures files

Scientific paper

In this work we will study the longitudinal polarisations of both leptons in the decay process ${\bar B} \to {\bar K}_2(1430)\, \ell^+ \, \ell^-$. This process has all the features of the related and well investigated process ${\bar B} \to {\bar K}^*(890) \, \ell^+ \, \ell^-$, with theoretically comparable branching ratios. The polarised differential decay rates as well as the single and double polarisation asymmetries are worked out, where the sensitivity of these to possible right-handed couplings for the related $b \to s$ radiative decay (and other generic BSM parameters) are also investigated.

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