  Recent detection of the neutrino events IceCube-170922A, 13 muon-neutrino
events observed in 2014-2015 and IceCube-141209A by IceCube observatory from
the Blazars, namely TXS 0506+056, PKS 0502+049/TXS 0506+056 and GB6 J1040+0617
respectively in the state of enhanced gamma-ray emission, indicates the
acceleration of cosmic rays in the blazar jets. The photo-meson ($p\gamma$)
interaction cannot explain the IceCube observations of 13 neutrino events. The
non-detection of broadline emission in the optical spectra of the IceCube
blazars, however, question the hadronuclear (pp) interaction interpretation
through relativistic jet meets with high density cloud. In this work, we
investigate the proton blazar model in which the non-relativistic protons that
come into existence under the charge neutrality condition of the blazar jet can
offer sufficient target matter for $pp$ interaction with shock-accelerated
protons, to describe the observed high-energy gamma-rays and neutrino signal
from the said blazars. Our findings suggest that the model can explain
consistently the observed electromagnetic spectrum in combination with
appropriate number of neutrino events from the corresponding blazars.

High Energy Astrophysical Phenomena