Zobrazeno 1 - 10
of 444
pro vyhledávání: '"Saad Shaikh"'
In prior studies, a very minimal Yukawa sector within the $SO(10)$ Grand Unified Theory framework has been identified, comprising of Higgs fields belonging to a real $10_H$, a real $120_H$, and a $\overline{126}_H$ dimensional representations. In thi
Externí odkaz:
http://arxiv.org/abs/2409.03840
Autor:
Kaladharan, Ajay, Saad, Shaikh
In this work, we present a unified theoretical framework that simultaneously addresses some of the most intriguing puzzles in particle physics and cosmology, namely the origins of neutrino mass, baryon asymmetry, and cosmic inflation. In our model, i
Externí odkaz:
http://arxiv.org/abs/2409.02225
In a recent paper (see https://doi.org/10.1103/PhysRevD.108.095053), we have demonstrated that the 2023 PTA results, which hint at a stochastic gravitational wave (GW) background at nanohertz frequencies, point towards a promising model-building rout
Externí odkaz:
http://arxiv.org/abs/2406.17014
Under the assumption that the recent pulsar timing array evidence for a stochastic gravitational wave (GW) background at nanohertz frequencies is generated by metastable cosmic strings, we analyze the potential of present and future GW observatories
Externí odkaz:
http://arxiv.org/abs/2405.03746
Autor:
Doršner, Ilja, Saad, Shaikh
We demonstrate that it is not necessary to substantially break the mass degeneracy between the Standard Model Higgs boson doublet and the corresponding scalar leptoquark, where these two fields comprise a single five-dimensional $SU(5)$ representatio
Externí odkaz:
http://arxiv.org/abs/2404.09021
Autor:
Hinze, Kevin, Saad, Shaikh
Scalar leptoquarks naturally arise within unified theories, offering a promising avenue for addressing one of the most significant challenges of the Standard Model--the existence of non-zero neutrino masses. In this work, we present a unified theory
Externí odkaz:
http://arxiv.org/abs/2403.04644
We assess proton decay signatures in the simplest viable $SU(5)$ model with regard to constraints on parameters governing the Standard Model fermion mass spectrum. Experimental signals for all eight two-body proton decay processes result from exchang
Externí odkaz:
http://arxiv.org/abs/2401.16907
A series of pulsar timing arrays (PTAs) recently observed gravitational waves at the nanohertz frequencies. Motivated by this remarkable result, we present a novel class of Pati-Salam models that give rise to a network of metastable cosmic strings, o
Externí odkaz:
http://arxiv.org/abs/2308.13248
We generalise the Missing Partner Mechanism to split the electron-like states from the coloured ones of vectorlike SU(5) 10-plets without fine-tuning. Together with the extra light weak doublets from the Double Missing Partner Mechanism (DMPM), this
Externí odkaz:
http://arxiv.org/abs/2308.11705
In this work, we attempt to answer the question, "What is the minimal viable renormalizable $SU(5)$ GUT with representations no higher than adjoints?". We find that an $SU(5)$ model with a pair of vectorlike fermions $5_F+\overline{5}_F$, as well as
Externí odkaz:
http://arxiv.org/abs/2308.08585