ﻻ يوجد ملخص باللغة العربية
We inspect the exclusive hadronic decay modes $ B_dto phi (eta^{()}, pi, omega)$, induced by quark level transition as $bto d$ $(Delta S=0)$, in vector like down quark model. As these decay modes insist highly suppressed followed by the predicted branching fraction $mathcal{O}(10^{-9})$ which reflects to scrutinize physics beyond the standard model. We constrain the new parameter space inferred from experimental limits on leptonic $B_dto ell ell(ell=e, mu, tau)$ and nonleptonic decay modes $B_d to eta pi^0$ and $B_uto rho^- eta$. We then check the new physics contributions can have significant impact on the prominent observable so called branching ratio of $B_dto phi (eta^{()},pi, omega)$ processes.
We investigate the effect of an extra fourth quark generation and FCNC mediated $Z$ and $Z$ bosons on the rare decay mode $B^- to phi pi^-$. In the standard model, this mode receives only $b to d$ penguin contributions and therefore, highly suppresse
The process e+e- ->pi+pi- has been studied with the SND detector at VEPP-2M e+e- collider in the vicinity of phi(1020) resonance. From the analysis of the energy dependence of measured cross section the branching ratio B(phi->pi+pi-)=(7.1+-1.1+-0.9)*
We investigate the rare radiative eta decay modes eta -> pi+ pi- gamma gamma and eta -> pi0 pi0 gamma gamma within the framework of chiral lagrangians at o(p^4) and present photon spectra for both processes.
Based on a sample of $2.25times 10^{8} J/psi$ events taken with the BESIII detector at the BEPCII collider, we present the results of a study of the decay $J/psito eta phipi^{+}pi^{-}$. The $Y(2175)$ resonance is observed in the invariant mass spectr
The reaction e^+e^- ---> OMEGA+PI0 ---> PI+PI- 2PI0 has been studied with SND detector at VEPP-2M e^+e^- collider in the vicinity of the PHI(1020) meson resonance. The observed interference pattern in the energy dependence of the cross section is con