We study the exclusive rare decay B → k ̄ l l. We calculate the relevant form factors within a
relativistic constituent quark model, for the first time without employing the impulse …

A bstract We perform a comprehensive study of the impact of new-physics operators with
different Lorentz structures on decays involving the b→ sμ+ μ− transition. We examine the …

Hadronic form factors for the rare weak transitions Λb→ Λ (*) are calculated using a
nonrelativistic quark model. The form factors are extracted in two ways. An analytic …

Encouraged by the recent discovery of the Ξ cc baryon, we investigate two-body nonleptonic
weak decays of doubly charmed, Ξ cc, baryons. We calculate the branching ratios for …

We study the forward-backward asymmetry (A FB) and the differential branching ratio (DBR)
in B→ K* μ+ μ− in the presence of new physics (NP) with different Lorentz structures. We …

Using the most general, model independent form of the effective Hamiltonian, the exclusive
rare baryonic Λb→ Λℓ+ ℓ−(ℓ= μ, τ) decay is analyzed. We study the sensitivity of the …

We present a model independent analysis of Λ baryon polarizations in the Λ b→ Λ l+ l−
decay. The sensitivity of the averaged Λ polarizations to the new Wilson coefficients is …

We study the effect of the FCNC mediated Z boson in the rare semileptonic baryonic decays
Λ b→ Λ l+ l-. We consider the model where the standard model fermion sector is extended …

In the SUSY SO (10) GUT context, we study the exclusive processes B→K^(*)l^+l^-(l=μ,τ).
Using the Wilson coefficients of the relevant operators including the new operators …

The independent helicity amplitudes in the Λ b→ Λℓ+ ℓ− decay in the standard model and its
minimal extension, ie, with the new vector type interactions, are calculated. We calculate …