THE DIFFUSE GAMMA-RAY FLUX ASSOCIATED WITH SUB-PEV/PEV NEUTRINOS FROM STARBURST GALAXIES
THE DIFFUSE GAMMA-RAY FLUX ASSOCIATED WITH SUB-PEV/PEV NEUTRINOS FROM STARBURST GALAXIES
One attractive scenario for the excess of sub-PeV/PeV neutrinos recently reported by IceCube is that they are produced by cosmic rays in starburst galaxies colliding with the dense interstellar medium. These proton-proton ($pp$) collisions also produce high-energy gamma-rays, which finally contribute to the diffuse high-energy gamma-ray background. We calculate the …