Prospects for detecting the diffuse supernova neutrino background with JUNO
Langue
en
Article de revue
Ce document a été publié dans
JCAP. 2022, vol. 10, p. 033
Résumé en anglais
We present the detection potential for the diffuse supernova neutrino background (DSNB) at the Jiangmen Underground Neutrino Observatory (JUNO), using the inverse-beta-decay (IBD) detection channel on free protons. We ...Lire la suite >
We present the detection potential for the diffuse supernova neutrino background (DSNB) at the Jiangmen Underground Neutrino Observatory (JUNO), using the inverse-beta-decay (IBD) detection channel on free protons. We employ the latest information on the DSNB flux predictions, and investigate in detail the background and its reduction for the DSNB search at JUNO. The atmospheric neutrino induced neutral current (NC) background turns out to be the most critical background, whose uncertainty is carefully evaluated from both the spread of model predictions and an envisaged in situ measurement. We also make a careful study on the background suppression with the pulse shape discrimination (PSD) and triple coincidence (TC) cuts. With latest DSNB signal predictions, more realistic background evaluation and PSD efficiency optimization, and additional TC cut, JUNO can reach the significance of 3σ for 3 years of data taking, and achieve better than 5σ after 10 years for a reference DSNB model. In the pessimistic scenario of non-observation, JUNO would strongly improve the limits and exclude a significant region of the model parameter space.< Réduire
Mots clés en anglais
neutrino astronomy
neutrino detectors
supernova neutrinos
diffuse supernova neutrino background
neutrino: supernova
neutrino: background
background: suppression
neutrino: atmosphere
JUNO
efficiency
observatory
neutrino: flux
neutral current
data analysis method
sensitivity
numerical calculations: Monte Carlo
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