Zobrazeno 1 - 10
of 339
pro vyhledávání: '"Morais, António P."'
We study the Higgs boson decay into dark matter (DM) in the framework of freeze-in at stronger coupling. Even though the Higgs-DM coupling is significant, up to order one, DM does not thermalize due to the Boltzmann suppression of its production at l
Externí odkaz:
http://arxiv.org/abs/2410.21874
Searches for new physics (NP) at particle colliders typically involve multivariate analysis of kinematic distributions of final state particles produced in a decay of a hypothetical NP resonance. Since the pair-production cross-sections mediated by s
Externí odkaz:
http://arxiv.org/abs/2306.15460
Publikováno v:
Phys.Rev.D 110 (2024) 3, 035008
We study a simple extension of the Standard Model featuring a dark sector with an ultralight pseudo Nambu-Goldstone boson as dark matter candidate. We focus on the mass range $\mathcal{O}(10^{-20} - 10^{-10})$ eV, relevant for strong gravity applicat
Externí odkaz:
http://arxiv.org/abs/2305.03776
Autor:
Bonilla, Cesar, Hernández, A. E. Cárcamo, Gonçalves, João, N., Vishnudath K., Morais, António P., Pasechnik, Roman
We propose a framework to account for neutrino masses at the two-loop level. This mechanism introduces new scalars and Majorana fermions to the Standard Model. It is assumed the existence of a global $\mathrm{U(1)\times \mathcal{Z}_2}$ symmetry which
Externí odkaz:
http://arxiv.org/abs/2305.01964
Autor:
Addazi, Andrea, Marcianò, Antonino, Morais, António P., Pasechnik, Roman, Viana, João, Yang, Hao
We formulate a version of the low-scale Majoron model equipped with an inverse seesaw mechanism featuring lepton-number preserving dimension-6 operators in the scalar potential. Contrary to its dimension-4 counterpart, we find that the model can simu
Externí odkaz:
http://arxiv.org/abs/2304.02399
Autor:
Ferreira, Pedro M., Gonçalves, João, Morais, António P., Onofre, António, Pasechnik, Roman, Vatellis, Vasileios
In this work, we propose and explore for the first time a new collider signature of heavy neutral scalars typically found in many distinct classes of multi-Higgs models. This signature, particular relevant in the context of the Large Hadron Collider
Externí odkaz:
http://arxiv.org/abs/2211.10109
A minimal extension of the Standard Model (SM) featuring two scalar leptoquarks, an SU(2) doublet with hypercharge 1/6 and a singlet with hypercharge 1/3, is proposed as an economical benchmark model for studies of an interplay between flavour physic
Externí odkaz:
http://arxiv.org/abs/2206.01674
In this work, we continue our exploration of TeV-scale vector-like fermion signatures inspired by a Grand Unification scenario based on the trinification gauge group. A particular focus is given to pair-production topologies of vector-like quarks (VL
Externí odkaz:
http://arxiv.org/abs/2204.12542
Publikováno v:
Eur. Phys. J. C (2023) 83: 207
We suggest an appealing strategy to probe a large class of scenarios beyond the Standard Model simultaneously explaining the recent CDF II measurement of the $W$ boson mass and predicting first-order phase transitions (FOPT) testable in future gravit
Externí odkaz:
http://arxiv.org/abs/2204.10315
Autor:
Yang, Hao, Freitas, Felipe F., Marciano, Antonino, Morais, António P., Pasechnik, Roman, Viana, João
A chiral-symmetric technicolor model successfully reconciles the tension between electroweak precision tests and traditional technicolor models. Focusing on its simplest realization preserving the conventional Higgs mechanism, we study its primordial
Externí odkaz:
http://arxiv.org/abs/2204.00799