arXiv subjects

Manish Kumar Sharma

Publications and source records attributed to Manish Kumar Sharma.

2 recordsLinked to original sources

arXiv2023

Exploring the Electromagnetically Interacting Dark Matter at the International Linear Collider

Dark Matter being electrically neutral does not participate in electromagnetic interactions at leading order. However, we discuss here fermionic dark matter (DM) with permanent magnetic and electric dipole moment that interacts electromagnetically with photon at loop-level through a dimension-5 operator. We discuss the search prospect of the dark matter at the proposed International Linear Collider (ILC) and constrain the parameter space in the plane of the DM mass and the cutoff scale $Λ$. At the 500 GeV ILC with $4$ ab$^{-1}$ of integrated luminosity we probed the mono-photon channel and utilizing the advantages of beam polarization we obtained an upper bound on the cutoff scale that reaches up to $Λ= 3.72$ TeV.

hep-ph↗

arXiv2023

SN1987A cooling due to Plasmon-Plasmon scattering in the Randall-Sundrum Model

The light braneworld radion, stabilized via the Goldberger-Wise mechanism in the Randall-Sundrum model, can be produced copiously inside the supernova core due to plasmon-plasmon annihilations. The radion, thus produced, subsequently decays to a neutrino-antineutrino pair and takes away the energy released in the SN1987A explosion. Assuming that the supernovae cooling rate for any new physics channel(Raffelt's criterion) $\dot{\varepsilon}(γ_Pγ_P \stackrelϕ{\longrightarrow} ν_τ \overlineν_τ) \leq 7.288\times 10^{-27} \rm{GeV}$, we find the lower bound on the radion vacuum expectation value $\langleϕ\rangle \sim 3$~TeV for $m_ϕ= 30$ MeV corresponding to the deformation parameter $q=1.17$ in the Tsallis statistics formalism. In the scenario with $q=1$, we find $\langleϕ\rangle = 178$ GeV for $m_ϕ= 30$ MeV.

hep-ph↗