Dr. Najimuddin Khan

    B.Sc. in Physics Honours, M.Sc. Physics (Spcl. Particle Physics), Ph.D. in Physics (High Energy Physics), Postdoctoral Fellow [6 Years 8 Months]


    Assistant Professor


    High Energy Physics-Particle Physics, Astroparticle Physics Phenomenology, Stability analysis, dark matter, neutrino, inflation, gravitational waves and collider phenomenology of physics beyond the Standard Model in the context of high-energy high-luminosity colliders.


    Department of Physics Aligarh Muslim University, Aligarh Uttar Pradesh, India-202002




I am presently engaged in research within the domain of Particle-Astroparticle Physics phenomenology, aiming to enhance our understanding of Higgs properties, flavor physics, and the enigmatic dark matter of the Universe. Additionally, I have analyzed the scalar potential up to the Planck scale using RGEs, addressing the early Universe's inflation. Furthermore, I have projected parameter spaces that define distinct signatures of novel particles within various particle physics models. These projections offer promising avenues for experimentalists to detect these particles using cutting-edge facilities like the LHC colliders shortly. Consequently, my research holds significant allure for experimental and theoretical particle physicists.

  1. (Link for All Publications)

    My All Publication

  2. Anatomy of heavy gauge bosons in a left-right supersymmetric model

    We perform a detailed study of the various decay channels of the heavy charged and neutral gauge bosons (WR and ZR , respectively) in a left-right supersymmetric framework. We analyze two SUSY cascade decay channels, mono-W + missing ET and mono-Z+ missing ET,  along with the standard dilepton and dijet final states. Our results show that the existence of these heavy gauge bosons can be ascertained in the direct decay channels of dilepton and dijet, whereas the other two channels are required to establish the supersymmetric nature of this model.

    Download PDF
  3. Electroweak vacuum stability in presence of singlet scalar dark matter in TeV scale seesaw models

    We consider singlet extensions of the standard model, both in the fermion and in the scalar sector, to account for the generation of neutrino mass at the TeV scale and the existence of dark matter, respectively.  We show that although these two sectors are disconnected at low energy, the coupling constants of both the sectors get correlated at the high-energy scale by the constraints coming from the perturbativity and stability/metastability of the electroweak vacuum.

    Download PDF
  4. The stability analysis of the extended singlet scalar model with two high scale minima

    We study the simplest viable dark matter (DM) model with a real singlet scalar, vector-like singlet, and doublet fermions. The Yukawa couplings associated with the fermion sector are important in obtaining the current DM relic density through Freeze-out and Freeze-in mechanisms. In addition to the standard model-like high-scale minima along the Higgs field, we find other high-scale minima along the singlet scalar field direction. We did a detailed stability analysis.

  5. Constraints on inert dark matter from the metastability of the electroweak vacuum

    The inert scalar doublet model of dark matter can be valid up to the Planck scale. We briefly review the bounds on the model in such a scenario and identify parameter spaces that lead to absolute stability and metastability of the electroweak vacuum.

    Download PDF
  6. Study of electroweak vacuum metastability with a singlet scalar dark matter

    We study several aspects of electroweak vacuum metastability when an extra gauge singlet scalar, a viable candidate for a dark matter particle, is added to the standard model of particle physics, which is assumed to be valid up to the Planck scale.

    Download PDF