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

Black holes, gravitational waves and fundamental physics: a roadmap, L. Barack et al.,; arXiv:1806.05195 [gr-qc].

Publication type
Regular Articles
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Inflation with Planck: a survey of some "exotic" inflationary models, Cláudio Gomes, Orfeu Bertolami, João G. Rosa, Phys. Rev. D97, 104061 (2018); e-Print: arXiv:1803.08084 [hep-th].

Publication type
Regular Articles
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Scale-invariant scalar field dark matter through the Higgs portal, Catarina Cosme, João G. Rosa, Orfeu Bertolami, JHEP 1805, 129 (2018); e-Print: arXiv:1802.09434 [hep-ph].

Publication type
Regular Articles
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Electroweak phase transitions in multi-Higgs models: the case of Trinification-inspired THDSM, Thibault Vieu, António P. Morais, Roman Pasechnik; arXiv:1801.02670 [hep-ph].

Publication type
Regular Articles
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Adiabatic out-of-equilibrium solutions to the Boltzmann equation in warm inflation, Mar Bastero-Gil, Arjun Berera, Rudnei O. Ramos, João G. Rosa, JHEP 1802, 063 (2018); e-Print: arXiv:1711.09023 [hep-ph].

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Regular Articles
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See Cosmology publications

Latest Cosmology News & Events

Is dark energy really constant?

Speaker
Tiago Barreiro (IA - Lisbon)
Event date
Venue
GAP room
Event type
Seminars

One well known problem of the standard cosmological constant model is the tension between the high level of clustering observed in the CMB and the one obtained from large-scale structures. This may be an indication that the way  dark energy affects clustering might differ from a simple cosmological constant.

Cosmology

Dark side of the seesaw

Speaker
Ivo de Medeiros Varzielas (CFTP - IST Lisbon)
Event date
Venue
GAP room
Event type
Seminars
I will explore the idea of connecting the dark matter sector with a sector of the Standard Model (SM), namely the neutrino sector. To do this, I consider the extension of the SM with right-handed (gauge singlet) neutrinos, which will lead to a type-I seesaw mechanism. Then I also add a fermion (another gauge singlet) dark matter candidate.
Cosmology
High Energy Physics

Visit of Kunihito Uzawa

Seminars

Professor Kunihito Uzawa from Kwansei Gakuin University, Japan, visited Gr@v in the last week of September 2018 and gave a seminar on "No-Go theorems for ekpyrosis from ten-dimensional supergravity". (In the photo with Eugen Radu.)

Strong Gravity
Cosmology

No-Go theorems for ekpyrosis from ten-dimensional supergravity

Speaker
Kunihito Uzawa, Kwansei Gakuin University, Japan
Event date
Venue
room 32.1.3 CICFANO
Ends on
Event type
Seminars

Abstract: In this talk, we present whether the new ekpyrotic scenario
can be embedded into ten-dimensional supergravity. We use that the
scalar potential obtained from flux compactifications of type II
supergravity with sources has a universal scaling with respect to the

Strong Gravity
Cosmology
See Cosmology News & Events