Prompt high-energy neutrinos from gamma-ray bursts in photospheric and synchrotron self-Compton scenarios

TL;DR

This paper explores neutrino emissions from gamma-ray bursts under alternative prompt emission models, highlighting their potential detectability and implications for understanding GRB jet composition and baryon acceleration.

Contribution

It introduces and compares neutrino predictions from photospheric and synchrotron self-Compton scenarios, offering new insights beyond the classical optically thin synchrotron model.

Findings

pp reaction neutrinos at 10-100 TeV could be detectable by IceCube/KM3Net

EeV pgamma neutrinos may be produced in the synchrotron self-Compton scenario

Neutrino spectra differ significantly from classical models, aiding GRB characterization

Abstract

We investigate neutrino emission from gamma-ray bursts (GRBs) under alternative scenarios for prompt emission (the photospheric and synchrotron self-Compton scenarios) rather than the classical optically thin synchrotron scenario. In the former scenario, we find that neutrinos from the pp reaction can be very important at energies around 10-100 TeV. They may be detected by IceCube/KM3Net and useful as a probe of baryon acceleration around/below the photosphere. In the latter scenario, we may expect about EeV pgamma neutrinos produced by soft photons. Predicted spectra are different from that in the classical scenario, and neutrinos would be useful as one of the clues to the nature of GRBs (the jet composition, emission radius, magnetic field and so on).