A. Ozpineci

Rare B{r_arrow}K{sup *}l{sup +}l{sup {minus}} decay in light cone QCD

We investigate the transition form factors for the B{r_arrow}K{sup *}l{sup +}l{sup {minus}} (l={mu},{tau}) decay in light cone QCD. It is found that the light cone and three-point QCD sum rule analyses for some of the form factors for the decay B{r_arrow}K{sup *}l{sup +}l{sup {minus}} lead to absolutely different q{sup 2} dependence. The invariant dilepton mass distributions for the B{r_arrow}K{sup *}{mu}{sup +}{mu}{sup {minus}} and B{r_arrow}K{sup *}{tau}{sup +}{tau}{sup {minus}} decays and final lepton longitudinal polarization asymmetry, which includes both short- and long-distance contributions, are also calculated. {copyright} {ital 1997} {ital The American Physical Society}

New physics effects to the lepton polarizations in the B ---> K lepton+ lepton- decay

Using the general, model independent form of the effective Hamiltonian, the general expressions of the longitudinal, normal, and transversal polarization asymmetries for

Exclusive B→K∗ℓ+ℓ− decay with polarized K∗ and new physics effects

{l}^{\ensuremath{-}}

Exclusive Λb→Λℓ+ℓ− decay beyond standard model

and

Light cone QCD sum rule analysis of B → Kℓ+ℓ− decay

{l}^{+}

T-odd correlations inB→K*l+l−decay beyond the standard model

and combinations of them for the exclusive

Semileptonic Bs→DsJ(2460)lν decay in QCD

\stackrel{\ensuremath{\rightarrow}}{B}{\mathrm{Kl}}^{+}{l}^{\ensuremath{-}}

Bq→l+l−γdecays in light cone QCD

decay are found. The sensitivity of lepton polarizations and their combinations on new Wilson coefficients are studied. It is found that there exist regions of Wilson coefficients for which the branching ratio coincides with the standard model result while the lepton polarizations differ substantially from the standard model prediction. Hence, studying lepton polarization in these regions of new Wilson coefficients can serve as a promising tool for establishing new physics beyond the standard model.

T violation in Λb→Λℓ+ℓ− decay beyond standard model

Using the most general, model independent effective Hamiltonian, the branching ratio of the (B -> K^* l^+ l^-) decay, when K^* meson is longitudinally or transversally polarized, is presented. The dependence of the branching ratio on the new Wilson coefficients, when K^* meson is polarized, is studied. It is observed that the branching ratio is very sensitive to the vector and tensor type interactions, which will be useful in search of new physics beyond the Standard Model.

Two Higgs doublet model and lepton polarization in the decay

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.