Exclusive Lambda(b)->Lambda l(+)l(-) decay in a two-Higgs-doublet model

Rare Lambda(b) --> Lambda l(+)l(-) decay is investigated within a framework of a general two-Higgs-doublet model, in which a new sourer of CP violation exists (model III). The polarization parameter, CP asymmetry and decay width are calculated. It is shown that CP asymmetry is a sensitive tool for establishing model III.


The exclusive Lambda(b) Lambda l(+) l(-) decay in the general two Higgs doublet model
Turan, Gürsevil (IOP Publishing, 2005-05-01)
The exclusive Lambda(b) -> Lambda l(+)l decay is analysed in the model III version of the two Higgs doublet model. We especially studied the branching ratio and the forward-backward asymmetry of this process and investigated the sensitivity of these physical observable to the model parameters. We have found that they are highly sensitive to new physics and hence provide powerful probe of the SM.
Measurement of Lambda(+)(c) production in neutrino charged-current interactions
Kayis-Topaksu, A; et. al. (Elsevier BV, 2003-03-01)
A measurement of Lambda(c)(+) production in neutrino nucleon charged-current interactions is presented. In a subsample of about 50 000 interactions located in the emulsion target of the CHORUS detector, exposed to the wide band neutrino beam of the CERN SPS, candidates for decays of short-lived particles were identified using new automatic scanning systems and later confirmed through visual inspection. Criteria based on the flight length allowed a statistical separation among the different charm species thu...
Forward-backward asymmetries in Lambda(b)->Lambda l(+)l(-) decay beyond the standard model
Alıyev, Tahmasıb; Savcı, Mustafa (Elsevier BV, 2005-03-07)
We study the doubly-polarized lepton pair forward-backward asymmetries in Lambda(b) --> Lambdae(+)e(-) decay using a general, model independent form of the effective Hamiltonian. We present the general expression for nine doubly-polarized forward-backward asymmetries. It is observed that, the study of the forward-backward asymmetries of the doubly-polarized lepton pair is a very useful tool for establishing new physics beyond the standard model. Moreover, the con-elation between forward-backward asymmetry a...
mu+N ->tau+N at a muon or neutrino factory
Sher, M; Turan, İsmail (American Physical Society (APS), 2004-01-01)
The experimental discovery of large nu(mu)-nu(tau) mixing indicates that analogous mixing in the charged lepton sector could be substantial. We consider the possibility that if a high intensity muon beam, perhaps at the early stages of a muon or neutrino factory, strikes a nuclear target, then conversion of some of the muons into tau leptons could occur (similar to the conversion of muons to electrons at MECO). Using current experimental limits on rare tau decays to bound the size of the relevant operators,...
The exclusive Lambda(b)->Lambda l(+)l(-) decay with the fourth generation
Turan, Gürsevil (2005-05-01)
The exclusive Lambda(b)->Lambda l(+)l(-) decay is analyzed in the fourth generation model. We studied the sensitivity of the physical observables such as the branching ratio and the forward-backward asymmetry of this process to the model parameters, namely, the mass of the fourth generation up-type quark t' and the fourth generation CKM matrix element V-t's*V-t'b by using two possible solutions of the latter and the experimental results on branching ratios for B-s -> X-s gamma and Bs -> X(c)l nu overbar. It...
Citation Formats
T. Alıyev and M. Savcı, “Exclusive Lambda(b)->Lambda l(+)l(-) decay in a two-Higgs-doublet model,” JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, pp. 997–1009, 2000, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41073.