no code implementations • 18 Sep 2020 • Mengjiao Xiao, Kerstin M. Perez, Maurizio Giannotti, Oscar Straniero, Alessandro Mirizzi, Brian W. Grefenstette, Brandon M. Roach, Melania Nynka
We use the first observation of Betelgeuse in hard $X$-rays to perform a novel search for axion-like particles (ALPs).
High Energy Astrophysical Phenomena High Energy Physics - Phenomenology
no code implementations • 26 Aug 2020 • Francesca Calore, Pierluca Carenza, Maurizio Giannotti, Joerg Jaeckel, Alessandro Mirizzi
ALPs coupled only to photons are produced in the SN core via the Primakoff process, and then converted into gamma rays in the Galactic magnetic field.
High Energy Physics - Phenomenology High Energy Astrophysical Phenomena
1 code implementation • 30 Nov 2019 • Robert Glas, H. -Thomas Janka, Francesco Capozzi, Manibrata Sen, Basudeb Dasgupta, Alessandro Mirizzi, Guenter Sigl
The transport solution does not provide the angular distributions of the neutrino fluxes, which are crucial to track the fast flavor instability.
High Energy Astrophysical Phenomena High Energy Physics - Phenomenology
no code implementations • 27 Jun 2019 • Pierluca Carenza, Tobias Fischer, Maurizio Giannotti, Gang Guo, Gabriel Martinez-Pinedo, Alessandro Mirizzi
We find that the axion emissivity is reduced by over an order of magnitude with respect to the basic OPE calculation, after all these effects are accounted for.
High Energy Physics - Phenomenology Solar and Stellar Astrophysics
no code implementations • 8 Sep 2016 • Manuel Meyer, Maurizio Giannotti, Alessandro Mirizzi, Jan Conrad, Miguel Sanchez-Conde
In a Galactic core-collapse supernova (SN), axionlike particles (ALPs) could be emitted via the Primakoff process and eventually convert into $\gamma$ rays in the magnetic field of the Milky Way.
High Energy Astrophysical Phenomena High Energy Physics - Phenomenology
no code implementations • 14 Oct 2014 • Alexandre Payez, Carmelo Evoli, Tobias Fischer, Maurizio Giannotti, Alessandro Mirizzi, Andreas Ringwald
We revise the bound from the supernova SN1987A on the coupling of ultralight axion-like particles (ALPs) to photons.
High Energy Astrophysical Phenomena High Energy Physics - Phenomenology
no code implementations • 23 Jun 2014 • Adrian Ayala, Inma Dominguez, Maurizio Giannotti, Alessandro Mirizzi, Oscar Straniero
We derive a strong bound on the axion-photon coupling $g_{a\gamma}$ from the analysis of a sample of 39 Galactic Globular Clusters.
Solar and Stellar Astrophysics High Energy Physics - Phenomenology
2 code implementations • 30 Dec 2008 • Alessandro Mirizzi, Javier Redondo, Guenter Sigl
Various extensions of the Standard Model predict the existence of hidden photons kinetically mixing with the ordinary photon.
High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics
