Hadronic Origin of Sub-PeV Gamma-Ray Emission from LHAASO J0621+3755
This work investigates sub-PeV gamma-rays from pulsar PSR J0622+3749 using a hadronic model instead of standard leptonic models. The analysis shows that CR protons must carry 14% of the pulsar's spin-down power to explain the observed TeV emission, suggesting proton interactions with ambient matter or photons are responsible for the gamma-ray spectrum.