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Measuring time variation of solar and atmospheric neutrinos in dark matter detectors

Published on:

28 February 2024

Primary Category:

High Energy Physics - Phenomenology

Paper Authors:

Yi Zhuang,

Louis E. Strigari,

Lei Jin,

Samiran Sinha

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Key Details

Yearly ~3% flux variation detectable in 100 ton Xenon detector after 10 years

Daily neutrino flux variation detectable to amplitude similar to current best limits

Nuclear recoil channel requires detector improvements for eccentricity detection

Results provide scalings to determine sensitivity as a function of detector parameters

Identifying neutrino time variations is important to distinguish signals and extract unique neutrino properties

AI generated summary

Measuring time variation of solar and atmospheric neutrinos in dark matter detectors

This paper studies detecting time variation of solar and atmospheric neutrino fluxes in future large Xenon and Argon dark matter detectors. A yearly variation arises from Earth's orbit eccentricity, and a smaller daily variation arises from neutrino flavor changes as they pass through Earth. For a 100-ton Xenon detector running 10 years, a 0.8% time variation is detectable in electron recoils with 90% power, sufficient to detect the 3% eccentricity amplitude. In nuclear recoils the detectable amplitude is ~10% currently and ~1% with improved detector resolution and efficiency, also sufficient to detect eccentricity.

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