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Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - NU - Neutrino
Low Energy Neutrinos from Stopped Muons in the Earth
W.L. Guo
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Pre-published on: 2019 September 27
Published on:
We explore the low energy neutrinos from stopped cosmic ray muons in the Earth. Based on the
muon intensity at the sea level and the muon energy loss rate, the depth distributions of stopped
muons in the rock and sea water can be derived. Then we estimate the μ − decay and nuclear
capture probabilities in the rock. Finally, we calculate the low energy neutrino fluxes and find
that they depend heavily on the detector depth d. For d = 1000 m, the ν e , ν̄ e , ν μ and ν̄ μ fluxes
in the range of 13 MeV ≤ E ν ≤ 53 MeV are averagely 10.8%, 6.3%, 3.7% and 6.2% of the
corresponding atmospheric neutrino fluxes, respectively. The above results will be increased by a
factor of 1.4 if the detector depth d < 30 m. In addition, we find that most neutrinos come from
the region within 200 km and the near horizontal direction, and the ν̄ e flux depends on the local
rock and water distributions.
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