This work was partially supported by the Spanish Ministry of Sci-ence, Innovation and Universities (PID2019-107844GB-C21/AEI/10.13039/501100011033) and by the Junta de Andalucia, Spain (FQM 101, SOMM17/6104/UGR, P18-FR-1962, P18-FR-5057) . MGG acknowledges a grant from Programa Operativo de Empleo Juvenil (Junta de Andalucia) . The work of GHT has been funded by the program Es-tancias Postdoctorales en el Extranjero 2019-2020 of CONACYT, Mexico. GHT also acknowledges Prof. Pablo Roig for partial support through Catedra Marcos Moshinsky (Fundacion Marcos Moshinsky) . Funding for open access charge: Universidad de Granada/CBUA.
The atmospheric neutrino flux includes a component from the prompt decay of charmed hadrons that becomes significant only at E >= 10 TeV. At these energies, however, the diffuse flux of cosmic neutrinos discovered by IceCube seems to be larger than the atmospheric one. Here we study the possibility to detect a neutrino interaction in down-going atmospheric events at km3 telescopes. The neutrino signal will always appear together with a muon bundle that reveals its atmospheric origin and, generically, it implies an increase in the detector activity with the slant depth. We propose a simple algorithm that could separate these events from regular muon bundles.
Spanish Ministry of Science, Innovation and Universities PID2019-107844GB-C21/AEI/10.13039/501100011033
Junta de Andalucia European Commission FQM 101- SOMM17/6104/UGR- P18-FR-1962- P18-FR-5057
Junta de Andalucia
Program Es-tancias Postdoctorales en el Extranjero 2019-2020 of CONACYT, Mexico
Universidad de Granada/CBUA
Catedra Marcos Moshinsky (Fundacion Marcos Moshinsky)