Exclusive Λb→Λℓ+ℓ− decay beyond standard model

Download

1-s2.0-S0550321302009641-main.pdf

Date

2003-1

Author

Alıyev, Tahmasıb
Özpineci, Altuğ
Savcı, Mustafa

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 United States License.

Item Usage Stats

119
views

197
downloads

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 branching ratio and lepton forward–backward asymmetry to the new Wilson coefficients. It 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.

Subject Keywords

Models beyond the standard model, Decays of baryons, Bottom baryons

URI

https://hdl.handle.net/11511/28503

Journal

Nuclear Physics B

DOI

https://doi.org/10.1016/s0550-3213(02)00964-1

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

T violation in Lambda b ->Lambda l(+)l(-) decay beyond standard model Alıyev, Tahmasıb; Özpineci, Altuğ; Savcı, Mustafa (2002-08-29) Using the most general, model independent form of effective Hamiltonian, the transverse polarization PT of A in Ab Al(+)l(-) decay is studied. It is observed that the averaged (PT) is very sensitive to the existence of new physics and can attain large values, which can be measured at future colliders.
Exclusive B -> K*l(+)l(-) decay with polarized K* and new physics effects Alıyev, Tahmasıb; Özpineci, Altuğ; Savcı, Mustafa (2001-06-28) 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 tenser type interactions, which will be useful in search of new physics beyond the Standard Model.
Exclusive B -> K*l(+)l(-) decay in the three Higgs doublet model Iltan, EO (2000-03-01) We study the differential branching ratio and CP asymmetry for the exclusive decay B --> K*l(+)l(-) in the three Higgs doublet model with an additional global O(2) symmetry in the Higgs sector. We analyze the dilepton mass square q(2) dependency of these quantities. Further, we study the effect of a new parameter of the global symmetry in the Higgs sector on the differential branching ratio and CP asymmetry. We see that there exists an enhancement in the branching ratio and considerable CP violation for the...
Rare B -> l(+)l(-)gamma decay and new physics effects Alıyev, Tahmasıb; Özpineci, Altuğ; Savcı, Mustafa (2001-11-08) Using the most general, model independent form of the effective Hamiltonian rare decays B --> l(+)l(-)gamma (l = mu, tau) are studied. The sensitivity of the photon energy distribution and branching ratio to the new Wilson coefficients is investigated.
B-s ->tau(+)tau(-) decay in the general two Higgs doublet model Iltan, EO; Turan, Gürsevil (2002-11-01) We study the exclusive decay B-s --> tau(+)tau(-) in the general two Higgs doublet model. We analyse the dependencies of the branching ratio on the model parameters, including the leading order QCD corrections. We found that there is an enhancement in the branching ratio, especially for r(tb) = (xi) over bar (U)(N,tt)/(xi) over bar (D)(N,bb) > 1 case. Further, the neutral Higgs effects are detectable for large values of the parameter (xi) over bar (D)(N,tautau).

Citation Formats

T. Alıyev, A. Özpineci, and M. Savcı, “Exclusive Λb→Λℓ+ℓ− decay beyond standard model,” Nuclear Physics B, pp. 168–188, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/28503.