Neutrino production in Population III microquasars

CARULLI, AGUSTÍN M.; REYNOSO, MATÍAS M.; ROMERO, GUSTAVO E.

La Serena

Congreso; Segunda Reunión Binacional AAA-SOCHIAS; 2018

AAA-SOCHIAS

Context: Population III microquasars (Pop III MQs) may have been one of the main contributors to the reionization of the intergalactic medium. It is thought that PopIII stars were formed at redshifts z ∼ 20 − 30, which prevents the possibility of detecting gamma rays of very high energy (E > 100 GeV). Conversely, it would be possible to detect neutrinos at the present, since they interact with matter only via the weak interaction.Aims: We develop a model that accounts for neutrino production in Pop III MQs and compare the diffuse neutrino fluxes obtained with the available data from IceCube neutrino telescope.Method: We solve transport equations to obtain the particle distributions at the different zones considered along the jets. We compute the distributions of primary particles (i.e. protons and electrons) in each zone, which cool down due to radiative processes and also interact with other particle targets, to give a distribution of secondary particles (i.e. muons and pions). We then obtain the muon and pion distributions and compute their decays, from which we obtain a neutrino output. Finally, we integrate with respect to the redshift z and over the line-of-sight angle in order to obtain the diffuse neutrino flux that may be observed from the Earth.