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Dark Matter spikes around Sgr A* in -rays
Shyam Balaji, Divya Sachdeva, Filippo Sala +1
We use H.E.S.S. -ray observations of Sgr A* to derive novel limits on the Dark Matter (DM) annihilation cross-section. We quantify their dependence on uncertainties i) in the DM…
The Hubble Rate Trouble: An Effective Field Theory of Dark Matter
Alvaro S. de Jesus, Nelson Pinto-Neto, Farinaldo S. Queiroz +2
The Hubble constant inferred from the 6-parameter fit to the CMB power spectrum conflicts with the value obtained from direct measurements via type Ia supernova and Cepheids observ…
Improved stellar limits on a light CP-even scalar
Shyam Balaji, P. S. Bhupal Dev, Joseph Silk +1
We derive improved stellar luminosity limits on a generic light CP-even scalar field mixing with the Standard Model (SM) Higgs boson from the supernova SN1987A, the Sun, red gi…
Cooling of Neutron Stars admixed with Light Dark Matter: a case study
M. Ángeles Pérez-García, H. Grigorian, C. Albertus +2
Neutron Stars (NSs) are born as hot, lepton-rich objects that evolve according to the standard paradigm through subsequent stages where they radiate the excess of energy by emittin…
Baryogenesis from ultra-slow-roll inflation
Yi-Peng Wu, Elena Pinetti, Kalliopi Petraki +1
The ultra-slow-roll (USR) inflation represents a class of single-field models with sharp deceleration of the rolling dynamics on small scales, leading to a significantly enhanced p…
Dark matter and bubble nucleation in old neutron stars
A. Herrero, M. A. Pérez-García, J. Silk +1
We study the probability for nucleation of quark matter droplets in the dense cold cores of old neutron stars induced by the presence of a self-annihilating dark matter component,…