7 papers
Nonspectator effects in B-> K^*+photon within the vector quark model
Mohammad R. Ahmady, Farrukh Chishtie
The tree level FCNC due to the presence of an additional generation of vector quarks result in the leading order nonspectator contributions to rare B-> K^*+photon decay mode. These…
A more careful estimate of the charm content of eta'
M. R. Ahmady, E. Kou
We estimate the quantity |f_eta'^(c)| which is associated with the charm content of eta' meson from the experimentally known ratio R=B(psi ->eta' gamma )/B(psi ->eta_c gamma). It i…
Non-spectator contributions to B->X_s eta'
M. R. Ahmady, E. Kou, A. Sugamoto
We propose a nonspectator mechanism in which eta' is produced by two gluon fusion as the underlying process to explain the inclusive B-> X_s eta' as well as the exclusive B -> K^(*…
Effective Higgs-to-Light-Quark Coupling Induced by Heavy Quark Loops
M. R. Ahmady, V. Elias, A. H. Fariborz +1
We study the coupling arising via perturbative QCD of zero 4-momentum Higgs bosons to light quarks inside the nucleon. Qualitative comparison with the results obtained from one-loo…
Momentum Dependent Photon-Vector Meson Coupling and Parity Violating effects in B --> X_s l^+ l^-
Mohammad R. Ahmady
We examine the leptonic forward-backward and polarization (left-right) asymmetries in the dileptonic B -> X_s l^+ l^- decay when the momentum dependence of and conversio…
Long Distance Contributions to B-Decays into Higher K-Resonances
Mohammad R. Ahmady, Dongsheng Liu, Zhijian Tao
We use the new symmetries in the heavy quark limit to calculate the exclusive B-decays where are higher resonances of K-meson. We then estimate the long…