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Azeem Mir

Publications and source records attributed to Azeem Mir.

7 recordsLinked to original sources
arXiv2017

Study of rare mesonic decays involving di-neutrinos in their final state

We have carried out phenomenological implication of R-parity violating ($\NEG% {R}_{p}$) Minimal Supersymmetric Model (MSSM) via analyses of pure leptonic($% M\rightarrow ν\barν$) and semileptonic decays of pseudo-scalar mesons(% $M\rightarrow Xν\barν$). These analyses involve prediction of branching fraction of pure leptonic decays by using experimental limits/bounds derived from the study of semileptonic decays on $\NEG{R}_{p}$ parameters. We have found, in general that $\NEG{R}_{p}$ contribution dominates over the SM contribution i.e., by a factor of $10^{2}$ for the semleptonic decays of $K^{0}$, $10$ for the pure leptonic decays of $K_{L,S}$ , while $10^{2}~$\& $10^{4}$ in case of $B_{s}$ and $B_{d}$ respectively. This demonstrates the role of $\NEG{R}_{p}$ as a viable model for the study of NP contribution in rare decays.

hep-ph↗
arXiv2015

The study of NSIs in B and KL rare decays with three generations of quarks and interference effects between the standard model and NSIs

We study the rare decays of B meson. We want to constraint the NSIs by using these reactions. We show that there is a strong dependence of these reactions on new physics parameter. We include second and third generation of quarks in the loop for these decays. We further point out that the constraints for second generation are more precise as compared to second and third. We further point out that for inclusive decay, the u quark induce NSIs are giving very very small contribution. We also study KL rare decay to pi zero, neutrino and anti-neutrino. We also study the interference between the standard model and NSIs.

hep-ph↗
arXiv2014

New Physics Through Rare Decays Of Mesons

We study the contribution of 2nd generation of quarks in NSIs. We investigate it through the rare decays of mesons involving neutrinos in the final state. We show the C and s quarks can effect NSIs just like u and s. We explore constraints on free parameter of NSIs. For this purpose we select 6 FCNC semi-leptonic processes of B, D and K mesons having neutrinos in the final state

hep-ph↗
arXiv2014

New Physics from NSIs in charm Decays

We study rare decays of Charm in NSIs. We calculate the NSIs Branching ratios of these decays. There is a strong dependence of these on new physics parameter. They provide, stringent constraints on free parameter in tau.

hep-ph↗
arXiv2011

Study of semileptonic decays of D_{s} meson within R-parity violating supersymmetric model

We present the comaprative study of semileptonic and leptonic decays of D_{s},D^{\pm} and D^0 meson (D\rightarrowM l_{α}^+l_{β}^-,D\rightarrowl_{α}^+l_{β}^-,D\rightarrowl_{α}^+v_{α};α,β=e,μ) within the framework of R-parity violating (R_{p}) Minimal Supersymmetric Standard Model (MSSM). The comparison shows that combination and product couplings (λ_{βiα}λ_{ijq}^{'\ast} or λ_{βqk}'λ_{αjk}^{'\ast}) contribution to the branching fractions of the said processes rocesses(under consideration) is consistent or comparable to the experimental measurements in most of the cases. However, there exists some cases, where these contributions are suppressed but still comparable to that of standard model.

hep-ph↗
arXiv2009

Probing new physics through B->K l+ l- decays in R-parity violating minimal supersymmetric standard model

We study the decay rate of process B->K l+ l- (l=e,mu) and some of its other related observables, like forward backward asymmetry (A_{FB}), polarization asymmetry (PA) and CP-asymmetry (A_{CP}) in R-parity violating (R_{p}) Minimal Supersymmetric Standard Model (MSSM). The analysis shows that R_{p}Yukawa coupling products contribute significantly to the branching fraction of B->K l+ l- within 1 sigma and 2 sigma. Study shows that PA and A_{FB} are sensitive enough to R_{p}Yukawa coupling products and turn out to be good predictions for measurement in future experiments.The CP-asymmetry calculated in this framework agrees well with the recently reported value(i.e. 7%).

hep-ph↗