Lambda(b) -> Lambda l(+)l(-) decay in universal extra dimensions

Date

2007-03-01

Author

Alıyev, Tahmasıb
Savcı, Mustafa

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

171
views

0
downloads

We study the exclusive Lambda(b) ->Lambda l(+)l(-)(l = mu,Gamma) decay in the Appelquist, Chang, Dobrescu model with a single universal extra dimension. We investigate the sensitivity of the branching ratio, lepton polarization and forward-backward asymmetry A(FB) to the compactification parameter 1/R. We obtain the result that the branching ratio for the Lambda(b) -> Lambda l(+)l(-) (l = mu, T) decay changes about 25% compared to the SM value when 1/R = 250 GeV, and the zero position of the forward-backward asymmetry is shifted to the left compared to the SM result. Therefore, measurement of the branching ratio of Lambda(b) -> Lambda l(+)l(-) (l = mu,T) decay and determination of the zero position of AFB are very useful in looking for new physics in the framework of the UED models.

Subject Keywords

Physics and Astronomy (miscellaneous), Engineering (miscellaneous)

URI

https://hdl.handle.net/11511/41021

Journal

EUROPEAN PHYSICAL JOURNAL C

DOI

https://doi.org/10.1140/epjc/s10052-006-0203-5

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Model independent analysis of Lambda baryon polarizations in Lambda(b)->Lambda l(+)l(-) decay Alıyev, Tahmasıb; Özpineci, Altuğ; Savcı, Mustafa (American Physical Society (APS), 2003-02-01) We present a model independent analysis of Lambda baryon polarizations in the Lambda(b)-->Lambdal(+)l(-) decay. The sensitivity of the averaged Lambda polarizations to the new Wilson coefficients is studied. It is observed that there exist certain regions of the new Wilson coefficients where the branching ratio coincides with the standard model prediction, while the Lambda baryon polarizations deviate from the standard model results remarkably.
Z -> l(+)l(-) and W ->nu(l)l(+) decays in the noncommutative standard model Iltan, EO (American Physical Society (APS), 2002-08-01) We study Z-->l(+)l(-) and W-->nu(l)l(+) decays in the standard model including noncommutative effects. We observe that these effects appear in the flavor-dependent part of the decay widths of the processes under consideration and, therefore, they are more effective for the heavy lepton decays.
Form factors for the rare Λb(Λb*)→Nℓ+ℓ− decays in light cone QCD sum rules Alıyev, Tahmasıb; Savcı, Mustafa (American Physical Society (APS), 2018-08-23) Form factors of the rare Lambda(b)(Lambda*(b)) -> Nl(+)l(-) decays are calculated in the framework of the light cone QCD sum rules by taking into account the contributions from the negative parity baryons. Using the obtained results on the form factors, the branching ratios of the considered decays are estimated. The numerical survey for the branching ratios of the Lambda(b) -> Nl(+)l(-) and Lambda*(b) -> Nl(+)l(-) decays indicate that these transitions could be measurable in LHCb in near future. Comparison...
Possible manifestation of new scalar interaction in P-odd asymmetries in Lambda(b)->Lambda(+)(-)(T)(T) decay Alıyev, Tahmasıb; Savcı, Mustafa (Springer Science and Business Media LLC, 2006-10-01) Using the helicity amplitude method and including a new scalar type interaction in the matrix element of the exclusive semileptonic Lambda(b) -> Lambda tau(+) tau(-) decay, P-odd asymmetries with polarized and unpolarized heavy baryons are investigated. The result is obtained that the study of P-odd asymmetries can be promising for establishing the new scalar sector beyond the SM.
Multidimensional quantum tunneling in the Schwinger effect Dumlu, Cesim K. (American Physical Society (APS), 2016-03-22) We study the Schwinger effect, in which the external field having a spatiotemporal profile creates electron-positron pairs via multidimensional quantum tunneling. Our treatment is based on the trace formula for the QED effective action, whose imaginary part is represented by a sum over complex worldline solutions. The worldlines are multiperiodic, and the periods of motion collectively depend on the strength of spatial and temporal inhomogeneity. We argue that the classical action that leads to the correct ...

Citation Formats

T. Alıyev and M. Savcı, “Lambda(b) -> Lambda l(+)l(-) decay in universal extra dimensions,” EUROPEAN PHYSICAL JOURNAL C, pp. 91–99, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41021.