Sensitivity of JEM-EUSO to GRB Neutrinos

JEM-EUSO is a mission to study ultrahigh-energy cosmic rays (UHECRs) by measuring the fluorescence light from giant air showers at the altitude of the International Space Station. In the tilted mode, JEM-EUSO will become very sensitive to the Čerenkov light from the earth skimming tau neutrinos at the energy range of 10eV. In this paper we will discuss high-energy tau neutrinos from nearby gamma-ray bursts (GRBs). From simulations of cascade in GRB photon fields including various hadronic/leptonic processes, we estimate the neutrino flux from GRBs. Our results show that both muons and pions are dominant sources of neutrinos at the energy range of 10 eV. We discuss the possibility of detecting the Čerenkov light of upward going showers from Earth skimming tau neutrinos coming from some closest GRBs.