Exclusive (Lambda_b -> Lambda l^+ l^-) decay beyond standard model

Details Exclusive (Lambda_b -> Lambda l^+ l^-) decay beyond standard model Exclusive (Lambda_b -> Lambda l^+ l^-) decay beyond standard model

2002-02-13

arxiv.org/abs/hep-ph/0202120v1

Nucl.Phys.B649:168-188,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 16 figures, LaTeX formatted

Scientific paper

10.1016/S0550-3213(02)00964-1

Using the most general, model independent form of the effective Hamiltonian, the exclusive, rare baryonic (Lambda_b -> Lambda l^+ l^- ~l=\mu,\tau) decay is analyzed. We study sensitivity of the branching ratio and lepton forward-backward asymmetry to the new Wilson coefficients. Is is shown that these physical quantities are quite sensitive to the new Wilson coefficients. Determination of the position of zero value of the forward-backward asymmetry can serve as a useful tool for establishing new physics beyond the standard model, as well as fixing the sign of the new Wilson coefficients.

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