Journal Club 2026/2027

9 Nov 2026, 18:00 → 1 Aug 2027, 20:00 Europe/Madrid

Seminar room/Department's Library (Physics Department)

Journal Club for the Relativistic Astrophysics and Theoretical Physics (ARFIT) group of the UA.

Please, register if you want to receive reminders of the following events.

More information in the webpage of the group:
https://web.ua.es/grupo-de-astrofisica-relativista/

Thursday 12 November

11:30 → 13:00 Hunting Neutrinos

Outreach talk about the 2026 nobel prize.

Speakers: Dr Jorge Terol Calvo (University of Alicante), Víctor Miralles (University of Alicante)

Tuesday 17 November

10:00 → 11:00 The Fate of Magnetic Fields in Neutron Star Cores: Flux Expulsion and Ambipolar Evolution

The evolution of magnetic fields in neutron star cores remains a central uncertainty in understanding magnetars and their longevity. I will discuss two complementary aspects of this problem: magnetic flux expulsion during the onset of proton superconductivity, and ambipolar evolution of fields retained in the core. The first connects internal magnetic topology to observational signatures, including long-period radio transients. The second examines how cooling, composition gradients, and weak interactions regulate magnetic transport in normal matter. Together, these studies explore the conditions under which core fields can evolve, persist, and provide magnetic energy reservoirs beyond the conventional lifetime of magnetar activity.

Speaker: Dr Konstantinos Gourgouliatos (University of Patras)

Wednesday 25 November

12:00 → 13:00 Modeling axion-meson mixing in eta/eta' decays

Although the axion has been around for almost 50 years, no experimental signals of these pseudoscalar particles have been found, and its couplings to Standard Model particles are poorly constrained. In this work, we explore the rare decay η(′) → ππa, sensitive to axion-meson mixing, by developing an effective field theory based on Chiral Perturbation Theory and extended to include the axion with the final purpose of deriving analytical expressions for the η(′)–π–a mixing angles. Hierarchical relations among them can be proposed, thus reducing the number of free coupling constants in the theory. The explicit incorporation of the axion offers a novel theoretical tool to probe axion physics in rare meson decays as well as giving insight into the non-perturbative structure of QCD.

Speaker: Maria San Martín (University of Alicante)

Tuesday 1 December

11:00 → 12:00 Spectrum and dynamics of bosonic stars and their hairy black holes

I will discuss the current understanding of the landscape of bosonic
stars in simple GR models, the hairy black holes that are associated with them, and the corresponding dynamics. Some applications to phenomenological questions will be addressed.

Speaker: Prof. Carlos Herdeiro (University of Aveiro)

Wednesday 9 December

12:00 → 13:00 To be announced

Speaker: Dr Peter Rau (Columbia University)