Extensive searches to probe the particle nature of dark matter (DM) have been going on for some decades now but, so far, no conclusive evidence has been found. Among various options, the Weakly Interacting Massive Particles (WIMP) remains one of the prime
possibilities as candidates for DM near the TeV scale. Taking a phenomenological view, such null results may be explained for a generic...
We explore the projected sensitivity for SMEFT coefficients $\mathcal{C}_{tZ}$ and $\mathcal{C}_{tW}$ via single top $ pp \to tZj$ and top pair associated production $pp \to t\bar{t}Z$ channels with machine learning techniques, at the high luminosity LHC. Implications from new physics modifications in relevant background processes are also included. We identify the subset of observables that...
The top-quark Yukawa coupling, $y_t$ is the strongest interaction of the Higgs
boson in the Standard Model (SM) with $y_t$โผ1. Due to its magnitude, it plays
a central role in Higgs phenomenology in the SM and would be most sensitive to
physics beyond the Standard Model. The top Yukawa can be directly measured
at the LHC via top pair production in association with a Higgs boson,...
The trilinear self-coupling (ฮป) of Higgs can directly be accessed at the LHC by inclusive production of Higgs boson pair. A search for the non-resonant Higgs pair production via gluon-gluon fusion and as well as Vector Boson Fusion processes has been performed recently by CMS collaboration in various final state with the complete LHC Run-2 proton-proton collision data at center of mass energy...
The spectrum of the new physics beyond the Standard Model is very likely to be non-degenerate with few light non-SM particles residing close to the electroweak scale. The effect of the more complete theory then can be captured through an effective extension of the BSM scenario treating the new non-SM particles on the same footing along with the SM ones. To perform a detailed phenomenological...
We consider an effective field theory framework with three standard model (SM) gauge singlet right handed neutrinos, and an additional SM gauge singlet scalar field. The framework successfully generates eV masses of the light neutrinos via seesaw mechanism, and accommodates a feebly interacting massive particle (FIMP) as dark matter candidate. Two of the gauge singlet neutrinos ...
