Large-energy single hits at JUNO from atmospheric neutrinos and dark matter - INSPIRE

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Large-energy single hits at JUNO from atmospheric neutrinos and dark matter

Nov 29, 2021

12 pages

Published in:

Phys.Rev.D 105 (2022) 9, 095035

Published: May 1, 2022

e-Print:

2111.14586 [hep-ph]

DOI:

10.1103/PhysRevD.105.095035 (publication)

Report number:

TIFR/TH/21-20

View in:

ADS Abstract Service

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Abstract: (APS)

Large liquid scintillator detectors, such as JUNO, present a new opportunity to study neutral current events from the low-energy end of the atmospheric neutrinos, and possible new physics signals due to light dark matter. We carefully study the possibility of detecting “large-energy singles” (LES), i.e., events with visible scintillation energy

> 15 MeV

, but no other associated tags. For an effective exposure of

20 kton - yr

and considering only Standard Model physics, we expect the LES sample to contain

\sim 40

events from scattering on free protons and

\sim 108

events from interaction with carbon, from neutral-current interactions of atmospheric neutrinos. Backgrounds, largely due to

β

decays of cosmogenic isotopes, are shown to be significant only below 15 MeV visible energy. The LES sample at JUNO can competitively probe a variety of new physics scenarios, such as boosted dark matter and annihilation of galactic dark matter to sterile neutrinos.

Note:

12 pages, 8 figures

neutrino: atmosphere
scintillation counter: liquid
galaxy: dark matter
neutrino: sterile
JUNO
new physics
neutral current
dark matter: annihilation
background
carbon

References(58)

Figures(11)

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