The noncommutative effects on the dipole moments of fermions in the standard model

We study the dipole moments, electric dipole moment, weak electric dipole moment, anomalous magnetic moment, anomalous weak magnetic moment, of fermions in the noncommutative extension of the SM. We observe that the noncommutative effects are among the possible candidates to explain the electric and weak electric dipole moment of fermions. Furthermore, the upper bounds for the parameters which carry space-time and space-space noncommutativity can be obtained by using the theoretical and experimental results of the fermion dipole moments.Comment: 15 pages, 8 Figure

The possible effects of non-universal extra dimensions on t\to c l_i^- l_j^+ and H^0 \to h^0 (A^0) l_i^- l_j^+ decays in the general two Higgs Doublet model

We study the effects of non-universal extra dimensions on the decay widths of the lepton flavor violating processes, $t\to c l_i^- l_j^+$ and $H^0 \to h^0 (A^0) l_i^- l_j^+$ in the general two Higgs doublet model. We consider that the extra dimensions are accessible to the standard model gauge fields and the new Higgs doublet. We observe that the lepton flavor violating $H^0 \to h^0 (\tau^+ \mu^- + \tau^- \mu^+)$ and $H^0 \to A^0 (\tau^+ \mu^- + \tau^- \mu^+)$ Higgs decays are sensitive to the extra dimensions, especially, in the case of two spatial ones. This result may ensure a test to determine the compactification scale and the possible number of extra dimensions, with the accurate experimental measurements.Comment: 21 pages, 10 figure

Lepton flavor conserving Z boson decays and scalar unparticle

We predict the contribution of scalar unparticle to the branching ratios of the lepton flavor conserving Z -> l^+ l^- decays and we study the discrepancy between the experimental and the QED corrected standard model branching ratios. We observe that these decays are sensitive to the unparticle scaling dimension d_u for its small values, especially for heavy lepton flavor output.Comment: 18 pages, 1 table, 7 figure

The effects of lepton KK modes on the lepton electric dipole moments in the Randall Sundrum scenario

We study the charged lepton electric dipole moments in the Randall Sundrum model where the leptons and the gauge fields are accessible to the extra dimension. We observe that the electron (muon; tau) electric dipole moment reaches to the value of the order of 10^{-26} e-cm (10^{-20} e-cm; 10^{-20} e-cm) with the inclusion of the lepton KK modes.Comment: 17 pages, 5 figures, 2 table

The scalar unparticle effect on the charged lepton electric dipole moment

We study the charged lepton electric dipole moment which is induced by the scalar unparticle mediation and we predict the appropriate range for the free parameters appearing in the effective lagrangian which drives the unparticle-standard model lepton interactions. We observe that the charged lepton electric dipole moment is strongly sensitive to the scaling dimension d_u of the unparticle and the new couplings in the effective interaction. Furthermore, we see that the current experimental limits of charged lepton electric dipole moments can ensure an appropriate range for these free parameters.Comment: 19 pages, 13 Figure

The effect of localized new Higgs doublet on the radiative lepton flavor violating decays in the Randall Sundrum background

We study the radiative lepton flavor violating l_1->l_2\gamma decays in the two Higgs doublet model with localized new Higgs doublet in the Randall Sundrum background. We estimate the contributions of the KK modes of new Higgs bosons and left (right) handed charged lepton doublets (singlets) on the branching ratios of the decays considered. We observe that there is an enhancement in the branching ratios with the addition of new Higgs boson and lepton KK modes.Comment: 22 pages, 8 figures, 2 table

Lepton flavor violating Z->l_1^+ l_2^- decay in the split fermion scenario in the two Higgs Doublet model

We predict the branching ratios of Z-> e^{\pm} \mu^{\pm}, Z-> e^{\pm} \tau^{\pm} and Z-> \mu^{\pm} \tau^{\pm} decays in the framework of the 2HDM, in the split fermion scenario. We observe that the branching ratios are not sensitive to a single extra dimension, however, this sensitivity is considerably large for two extra dimensions.Comment: 20 pages, 7 figures, 1 table

Dark matter as a localized scalar in the extra dimension

We consider a standard model singlet which is accessible to a single extra dimension and its zero mode is localized with Gaussian profile around a point different than the origin. This zero mode scalar is a possible candidate for the dark matter and its annihilation rate is sensitive to the compactification radius of the extra dimension, the localization width and the position. For the case of non resonant annihilation, we estimated the dark matter scalar location around a point, at a distance \sim 3 \times localization width from the origin, by using the annihilation rate which is based on the current relic density.Comment: 9 pages, 3 figure

The Lorentz and CPT violating effects on the charged Higgs boson decays H^+ -> W^+ H^0 (h^0,A^0)

We study the decay widths of the processes H^+\to W^+ H^0 (h^0,A^0), including the Lorentz violating effects and analyze the possible CPT violating asymmetry arising from CPT odd coefficients. We observe that these effects are too small to be detected, since the corresponding coefficients are highly suppressed at the low energy scale.Comment: 15 pages, 6 figure