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arXiv · 1808.03199

Geoneutrinos from the rock overburden at SNO+

Virginia Strati·Scott A. Wipperfurth·Marica Baldoncini·William F. McDonough·Sara Gizzi·Fabio Mantovani
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Abstract

SNOLAB is one of the deepest underground laboratories in the world with an overburden of 2092 m. The SNO+ detector is designed to achieve several fundamental physics goals as a low-background experiment, particularly measuring the Earth's geoneutrino flux. Here we evaluate the effect of the 2 km overburden on the predicted crustal geoneutrino signal at SNO+. A refined 3D model of the 50 x 50 km upper crust surrounding the detector and a full calculation of survival probability are used to model the U and Th geoneutrino signal. Comparing this signal with that obtained by placing SNO+ at sea level, we highlight a $1.4^{+1.8}_{-0.9}$ TNU signal difference, corresponding to the ~5% of the total crustal contribution. Finally, the impact of the additional crust extending from sea level up to ~300 m was estimated.

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Virginia Strati, Scott A. Wipperfurth, Marica Baldoncini, William F. McDonough, Sara Gizzi, Fabio Mantovani. 2018-08-09. Geoneutrinos from the rock overburden at SNO+. https://arxiv.org/abs/1808.03199

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