Zobrazeno 1 - 10
of 470
pro vyhledávání: '"MORAIS, ANTONIO"'
We study supercooled first-order phase transitions above the QCD scale in a wide class of conformal Majoron-like U(1)' models that explain the totality of active neutrino oscillation data and produce a detectable stochastic gravitational wave backgro
Externí odkaz:
http://arxiv.org/abs/2412.02645
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