Ahmed Rashed

activity

20102022

Λ_{b} \to Λ_{c} τ ν ˉ_{τ}

using lattice QCD calculations

110 citations · 396 across the 17 of their papers we have counts for

collaborators

18 papers

hep-ph2022★ 23 cited

Dark photon and dark $Z$ mediated $B$ meson decays

Alakabha Datta, A. Hammad, Danny Marfatia +2

We study flavor changing neutral current decays of $B$ and $K$ mesons in the dark $U (1)_{D}$ model, with the dark photon/dark $Z$ mass between 10 MeV and 2 GeV. Although the model pr…

hep-ph2021★ 15 cited

The Dark $Z^{'}$ and Sterile Neutrinos Behind Current Anomalies

A. Hammad, Ahmed Rashed, S. Moretti

We show how, in the $B - L$ extension of the SM (BLSM) with an Inverse Seesaw (IS) mechanism for neutrino mass generation, a light $Z^{'}$ state with moderate couplings to SM objects, h…

hep-ph2020★ 6 cited

Searching for charged lepton flavor violation at $e p$ colliders

Stefan Antusch, A. Hammad, Ahmed Rashed

We investigate the sensitivity of electron-proton ( $e p$ ) colliders for charged lepton flavor violation (cLFV) in an effective theory approach, considering a general effective Lagra…

hep-ph2018★ 25 cited

New physics in inclusive $B \to X_{c} ℓ ν ˉ$ decay in light of $R (D^{(*)})$ measurements

Saeed Kamali, Ahmed Rashed, Alakabha Datta

In this work we study the effects of new-physics (NP) operators with different Lorentz structures on the inclusive $B \to X_{c} τ ν ˉ$ decay and make predictions for the ratio of tot…

hep-ph2017★ 3 cited

The $B \to π K$ Puzzle Revisited

Nicolas Boisvert Beaudry, Alakabha Datta, David London +2

For a number of years, there has been a certain inconsistency among the measurements of the branching ratios and CP asymmetries of the four $B \to π K$ decays ( $B^{+} \to π^{+} K^{0}$ , $B…

hep-ph2017★ 110 cited

Phenomenology of $Λ_{b} \to Λ_{c} τ ν ˉ_{τ}$ using lattice QCD calculations

Alakabha Datta, Saeed Kamali, Stefan Meinel +1

In a recent paper we studied the effect of new-physics operators with different Lorentz structures on the semileptonic $Λ_{b} \to Λ_{c} τ ν ˉ_{τ}$ decay. This decay is of interest in li…

hep-ph2016★ 5 cited

Determination of mass hierarchy with $ν_{μ} \to ν_{τ}$ appearance and the effect of nonstandard interactions

Ahmed Rashed, Alakabha Datta

Crucial developments in neutrino physics would be the determination of the mass hierarchy (MH) and measurement of the CP phase in the leptonic sector. The patterns of the transitio…

hep-ph2015★ 25 cited

Neutrino Masses and Deviation from Tri-bimaximal mixing in Δ(27) model with Inverse Seesaw Mechanism

M. Abbas, S. Khalil, A. Rashed +1

We propose a scheme, based on Δ(27) flavor symmetry and supplemented by other discrete symmetries and inverse seesaw mechanism, where both the light neutrino masses and the deviati…

hep-ph2015

Probing lepton non-universality in tau neutrino Scattering

Hongkai Liu, Ahmed Rashed, Alakabha Datta

Recently hints of lepton flavor non-universality emerged in the BaBar and LHCb experiments. In this paper we propose tests of lepton universality in $ν_{τ}$ scattering. To parametriz…

hep-ph2013

Tau neutrino as a probe of nonstandard interactions via charged Higgs and $W^{'}$ contribution

Ahmed Rashed

We discuss the impact of the presence of a charged Higgs and a $W^{'}$ gauge boson on the tau-neutrino nucleon scattering $ν_{τ} + N \to τ^{-} + X$ and $\barν_τ+ N \rightarrow τ^+…

hep-ph2013★ 11 cited

Tau neutrino as a probe of nonstandard interaction

Ahmed Rashed, Preet Sharma, Alakabha Datta

We study the $Δ$ -resonance and deep inelastic scattering contributions in the tau-neutrino nucleon scattering $ν_{τ} + N \to τ^{-} + X$ and $ν ˉ_{τ} + N \to τ^{+} + X$ in the presence of a…

hep-ph2013★ 12 cited

Radiative Scaling Neutrino Mass with $A_{4}$ Symmetry

Subhaditya Bhattacharya, Ernest Ma, Alexander Natale +1

A new idea for neutrino mass was proposed recently, where its smallness is not due to the seesaw mechanism, i.e. not inversely proportional to some large mass scale. It comes from…

hep-ph2012★ 67 cited

Scotogenic $A_{4}$ Neutrino Model for Nonzero $θ_{13}$ and Large $δ_{C P}$

Ernest Ma, Alexander Natale, Ahmed Rashed

Assuming that neutrinos acquire radiative seesaw Majorana masses through their interactions with dark matter, i.e. scotogenic from the Greek 'scotos' meaning darkness, and using th…

hep-ph2012★ 13 cited

Nonstandard interactions of tau neutrino via charged Higgs and $W^{'}$ contribution

Ahmed Rashed, Murugeswaran Duraisamy, Alakabha Datta

We consider charged Higgs and $W^{'}$ gauge boson contributions to the quasielastic scattering $ν_{τ} + n \to τ^{-} + p$ and $ν ˉ_{τ} + p \to τ^{+} + n$ . These effects modify…

hep-ph2011★ 14 cited

Deviation from Tri-Bimaximal Mixing and Large Reactor Mixing Angle

Ahmed Rashed

Recent observations for a non-zero $θ_{13}$ have come from various experiments. We study a model of lepton mixing with a 2-3 flavor symmetry to accommodate the sizable $θ_{13}$ mea…

hep-ph2011★ 29 cited

The charged lepton mass matrix and non-zero $θ_{13}$ with TeV scale New Physics

Ahmed Rashed, Alakabha Datta

We provide an explicit structure of the charged lepton mass matrix which is 2-3 symmetric except for a single breaking of this symmetry by the muon mass. We identify a flavor symme…

hep-ph2011★ 31 cited

The Top Forward Backward Asymmetry with general Z ' couplings

Murugeswaran Duraisamy, Ahmed Rashed, Alakabha Datta

The measurement of the top forward-backward asymmetry in $\ttbar$ production measured at the Tevatron shows deviation from the Standard Model prediction. A $u \to t$ transition vi…

hep-ph2010★ 7 cited

Probing light pseudoscalar, axial vector states through $η_{b} \to τ^{+} τ^{-}$

Ahmed Rashed, Murugeswaran Duraisamy, Alakabha Datta

In this paper we explore the decay $η_{b} - - > τ^{+} τ^{-}$ as a probe for a light pseudoscalar or a light axial vector state. We estimate the standard model branching ratio for this deca…

Dark photon and dark Z mediated B meson decays

The Dark Z′ and Sterile Neutrinos Behind Current Anomalies

Searching for charged lepton flavor violation at ep colliders

New physics in inclusive B→Xc​ℓνˉ decay in light of R(D(∗)) measurements

The B→πK Puzzle Revisited

Phenomenology of Λb​→Λc​τνˉτ​ using lattice QCD calculations

Determination of mass hierarchy with νμ​→ντ​ appearance and the effect of nonstandard interactions

Neutrino Masses and Deviation from Tri-bimaximal mixing in Δ(27) model with Inverse Seesaw Mechanism

Probing lepton non-universality in tau neutrino Scattering

Tau neutrino as a probe of nonstandard interactions via charged Higgs and W′ contribution

Tau neutrino as a probe of nonstandard interaction

Radiative Scaling Neutrino Mass with A4​ Symmetry

Scotogenic A4​ Neutrino Model for Nonzero θ13​ and Large δCP​

Nonstandard interactions of tau neutrino via charged Higgs and W′ contribution

Deviation from Tri-Bimaximal Mixing and Large Reactor Mixing Angle

The charged lepton mass matrix and non-zero θ13​ with TeV scale New Physics

The Top Forward Backward Asymmetry with general Z ' couplings

Probing light pseudoscalar, axial vector states through ηb​→τ+τ−

Dark photon and dark $Z$ mediated $B$ meson decays

The Dark $Z^{'}$ and Sterile Neutrinos Behind Current Anomalies

Searching for charged lepton flavor violation at $e p$ colliders

New physics in inclusive $B \to X_{c} ℓ ν ˉ$ decay in light of $R (D^{(*)})$ measurements

The $B \to π K$ Puzzle Revisited

Phenomenology of $Λ_{b} \to Λ_{c} τ ν ˉ_{τ}$ using lattice QCD calculations

Determination of mass hierarchy with $ν_{μ} \to ν_{τ}$ appearance and the effect of nonstandard interactions

Tau neutrino as a probe of nonstandard interactions via charged Higgs and $W^{'}$ contribution

Radiative Scaling Neutrino Mass with $A_{4}$ Symmetry

Scotogenic $A_{4}$ Neutrino Model for Nonzero $θ_{13}$ and Large $δ_{C P}$

Nonstandard interactions of tau neutrino via charged Higgs and $W^{'}$ contribution

The charged lepton mass matrix and non-zero $θ_{13}$ with TeV scale New Physics

Probing light pseudoscalar, axial vector states through $η_{b} \to τ^{+} τ^{-}$