Portals into Higgs vacuum stability

G Hiller, T Höhne, DF Litim, T Steudtner - Physical Review D, 2022 - APS
We address the notorious metastability of the Standard Model (SM) and promote it to a
model building task: What are the new ingredients required to stabilize the SM up to the …

Vacuum stability in the Standard Model and beyond

G Hiller, T Höhne, DF Litim, T Steudtner - Physical Review D, 2024 - APS
We revisit the stability of the Standard Model vacuum and investigate its quantum effective
potential using the highest available orders in perturbation theory and the most accurate …

The two scales of new physics in Higgs couplings

RT D'agnolo, F Nortier, G Rigo, P Sesma - Journal of High Energy Physics, 2023 - Springer
A bstract Higgs coupling deviations from Standard Model predictions contain information
about two scales of Nature: that of new physics responsible for the deviation, and the scale …

Effective operator bases for beyond Standard Model scenarios: an EFT compendium for discoveries

U Banerjee, J Chakrabortty, S Prakash… - Journal of High Energy …, 2021 - Springer
A bstract It is not only conceivable but likely that the spectrum of physics beyond the
Standard Model (SM) is non-degenerate. The lightest non-SM particle may reside close …

Thermally corrected masses and freeze-in dark matter: A case study

N Chakrabarty, P Konar, R Roshan, S Show - Physical Review D, 2023 - APS
If coupled feebly to the Standard Model bath, dark matter can evade the severe constraints
from the direct search experiments. At the same time, such interactions help produce dark …

Two-component doublet-triplet scalar dark matter stabilizing the electroweak vacuum

N Chakrabarty, R Roshan, A Sil - Physical Review D, 2022 - APS
A two-component scalar dark matter scenario comprising an additional scalar doublet and a
Y= 0 scalar triplet is proposed. Key features of the ensuing dark matter phenomenology are …

Freeze-in dark matter through forbidden channel in U (1) BL

P Konar, R Roshan, S Show - Journal of Cosmology and …, 2022 - iopscience.iop.org
We examine a scenario for freeze-in production of dark matter, which occurs due to the large
thermal correction to the mass of a decaying mediator particle present in the thermal bath of …

Neutrino mass and asymmetric dark matter: study with inert Higgs doublet and high scale validity

AD Banik, R Roshan, A Sil - Journal of Cosmology and …, 2021 - iopscience.iop.org
We consider an inert Higgs doublet (IHD) extension of the Standard Model accompanied
with three right handed neutrinos and a dark sector, consisting of a singlet fermion and a …

Two component singlet-triplet scalar dark matter and electroweak vacuum stability

AD Banik, R Roshan, A Sil - Physical Review D, 2021 - APS
We propose a two component dark matter setup by extending the Standard Model with a
singlet and a hyperchargeless triplet scalars, each of them being odd under different Z 2 …

Top-philic dark matter in a hybrid KSVZ axion framework

A Ghosh, P Konar, R Roshan - Journal of High Energy Physics, 2022 - Springer
A bstract We explore a two-component dark matter scenario in an extended Kim-Shifman-
Vainshtein-Zakharov (KSVZ) axion framework. This hybrid setup incorporates an extra SU …