Impact of Z ' and universal extra dimension parameters on different asymmetries in B-s ->phi l(+)l(-) decays

Author(s)

Ahmed, Ishtiaq ; Aslam, M. Jamil ; Paracha, M. Ali

• Document type: Journal article
• Source: Physical Review D; v. 88, n. 1, p. 22-pg., 2013-07-15.

Abstract

comprehensive study of the impact of new physics on different observables for B-s ->phi l(+)l(-)is carried out. We examine the new physics models, such as Z' and universal extra dimension models, where the effects of new physics come through the modification of Wilson coefficients. We analyze these effects through the theoretical prediction of the branching ratio, the forward-backward asymmetry, lepton polarization asymmetries, and the helicity fractions of the final-state meson. These observables will definitely be measured in present and future colliders with great precision. We also point out that hadronic uncertainties in various physical observables are small, which make them an ideal probe to establish new physics. Therefore, the measurements of these observables for the same decay would permit the detection of physics beyond the Standard Model and will also help us to distinguish between different new physics scenarios. (AU)

• FAPESP's process: 12/13047-2 - Physics beyond the standard model and nonperturbative aspects in rare semi-leptonic b decays
• Grantee: Muhammad Ali Paracha
• Support Opportunities: Scholarships in Brazil - Post-Doctoral