Cosmology

Cosmology is the study of the large scale structure of the Universe, as well as its dynamics. Our group has been involved in the study and development of cosmological models, in particular to explain the accelerated phases of the cosmological evolution, dubbed inflationary phases.

For our latest developments/activities in this area, please see the listing below.

Latest Cosmology Publications

Gravitational echoes of lepton number symmetry breaking with light and ultralight Majorons, Andrea Addazi, Antonino Marciano, António P. Morais, Roman Pasechnik, João Viana, Hao Yang; JCAP 09 (2023) 026, 2304.02399 [hep-ph].

Publication type
Regular Articles
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Gravitational waves from a scotogenic two-loop neutrino mass model, Cesar Bonilla, A. E. Carcamo Hernandez, João Gonçalves, Vishnudath K. N., António P. Morais, Roman Pasechnik; Phys.Rev.D 109 (2024) 9, 095022, 2305.01964 [hep-ph]

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Publication type
Regular Articles
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Exploring the viability of pseudo Nambu-Goldstone boson as ultralight dark matter in a mass range relevant for strong gravity applications, A. P. Morais, V. Oliveira, A. Onofre, R. Pasechnik, R. Santos; Phys. Rev. D 110 (2024) 035008; arXiv:2305.03776 [gr-qc].

Publication type
Regular Articles
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A convenient gauge for virial identities in axial symmetry, J. M. S. Oliveira, A. M. Pombo; Phys. Lett. B 837 (2023) 137646; arXiv:2207.12451 [gr-qc].

Publication type
Regular Articles
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Interplay between flavour anomalies and neutrino properties, F. F. Freitas, J. Gonçalves, A. P. Morais, R. Pasechnik, W. Porod; Phys. Rev. D 108 (2023) 11, 115002; arXiv:2206.01674 [hep-ph].

Publication type
Regular Articles
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See Cosmology publications

Latest Cosmology News & Events

Temperature evolution in the Early Universe and Freeze-in at stronger coupling

GGD - Gr@V seminar
Speaker
Catarina Cosme (University of Coimbra)
Event date
Venue
Hybrid: Sala Sousa Pinto and Zoom
Event type
Seminars

In this talk, I will discuss the freeze-in dark matter production mechanism at low reheating temperatures. The process is Boltzmann-suppressed if the dark matter mass is above the reheating temperature, and, in this case, the coupling to the thermal bath has to be significant to account for the observed dark matter relic density.

Cosmology
See Cosmology News & Events