High Energy Physics

High energy physics involves the study of the fundamental building blocks of nature at the shortest distances. These are the fundamental particles that are described by quantum fields such as the Higgs field found at CERN's Large Hadron Collider (LHC). Our group studies theories beyond the Standard Model of particle physics both from theoretical and phenomenological perspectives.

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


Latest High Energy Physics 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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Spinning boson stars and hairy black holes with non-minimal coupling, Carlos A. R. Herdeiro, Eugen Radu; International Journal of Modern Physics D 27 (2018) 1843009, arXiv:1803.08149 [gr-qc].

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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].

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Regular Articles
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Effective stability against superradiance of Kerr black holes with synchronised hair, Juan Carlos Degollado, Carlos A. R. Herdeiro, Eugen Radu; Phys. Lett. B781 (2018) 651, arXiv:1802.07266 [gr-qc].

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Regular Articles
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Does the black hole shadow probe the event horizon geometry?, Pedro V. P. Cunha, Carlos A. R. Herdeiro, Maria J. Rodrigues; Phys. Rev. D97 (2018) 084020, arXiv:1802.02675 [qr-qc].

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Regular Articles
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Latest High Energy Physics News & Events

Electroweak vacuum lifetime in two Higgs doublet models

Speaker
Pedro Ferreira (CFTC, University of Lisbon)
Event date
Venue
GAP room
Event type
The Two Higgs Doublet Model (2HDM) is an excellent candidate for physics Beyond the Standard Model, and it predicts the existence of extra scalar particles liable to be discovered in the coming years at the LHC. Unlike the Standard Model, however, the 2HDM scalar potential has a rich vacuum structure, with competing minima possible already at tree-level.

Dark side of the seesaw

Speaker
Ivo de Medeiros Varzielas (CFTP - IST Lisbon)
Event date
Venue
GAP room
Event type
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.