Polarization effects in exclusive semileptonic (Lambda_b -> Lambda l^+ l^-) decay

Details Polarization effects in exclusive semileptonic (Lambda_b -> Lambda l^+ l^-) decay Polarization effects in exclusive semileptonic (Lambda_b -> Lambda l^+ l^-) decay

2005-07-28

arxiv.org/abs/hep-ph/0507324v3

JHEP 0605 (2006) 001

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, 11 figures, LaTeX formatted

Scientific paper

10.1088/1126-6708/2006/05/001

The independent helicity amplitudes in the (Lambda_b -> \Lambda l^+ l^-) decay in the standard model and its minimal extension, i.e., with the new vector type interactions, are calculated. We calculate various asymmetry parameters characterizing the angular dependence of the differential decay width for the cascade decay (Lambda_b -> Lambda(-> a+b) V^* (-> l^+ l^-)) with polarized and unpolarized heavy baryons. The sensitivity of the asymmetry parameters to the new Wilson coefficients are analyzed.

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