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Title: Exploring nu Signals in Dark Matter Detectors

Abstract

We investigate standard and non-standard solar neutrino signals in direct dark matter detection experiments. It is well known that even without new physics, scattering of solar neutrinos on nuclei or electrons is an irreducible background for direct dark matter searches, once these experiments each the ton scale. Here, we entertain the possibility that neutrino interactions are enhanced by new physics, such as new light force carriers (for instance a "dark photon") or neutrino magnetic moments. We consider models with only the three standard neutrino flavors, as well as scenarios with extra sterile neutrinos. We find that low-energy neutrino--electron and neutrino--nucleus scattering rates can be enhanced by several orders of magnitude, potentially enough to explain the event excesses observed in CoGeNT and CRESST. We also investigate temporal modulation in these neutrino signals, which can arise from geometric effects, oscillation physics, non-standard neutrino energy loss, and direction-dependent detection efficiencies. We emphasize that, in addition to providing potential explanations for existing signals, models featuring new physics in the neutrino sector can also be very relevant to future dark matter searches, where, on the one hand, they can be probed and constrained, but on the other hand, their signatures could also be confused withmore » dark matter signals.« less

Authors:
 [1];  [1];  [1]
  1. Fermilab
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1436743
Report Number(s):
FERMILAB-PUB-12-048-T; arXiv:1202.6073
1090939
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
JCAP
Additional Journal Information:
Journal Volume: 1207
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Harnik, Roni, Kopp, Joachim, and Machado, Pedro A.N. Exploring nu Signals in Dark Matter Detectors. United States: N. p., 2012. Web. doi:10.1088/1475-7516/2012/07/026.
Harnik, Roni, Kopp, Joachim, & Machado, Pedro A.N. Exploring nu Signals in Dark Matter Detectors. United States. doi:10.1088/1475-7516/2012/07/026.
Harnik, Roni, Kopp, Joachim, and Machado, Pedro A.N. Wed . "Exploring nu Signals in Dark Matter Detectors". United States. doi:10.1088/1475-7516/2012/07/026. https://www.osti.gov/servlets/purl/1436743.
@article{osti_1436743,
title = {Exploring nu Signals in Dark Matter Detectors},
author = {Harnik, Roni and Kopp, Joachim and Machado, Pedro A.N.},
abstractNote = {We investigate standard and non-standard solar neutrino signals in direct dark matter detection experiments. It is well known that even without new physics, scattering of solar neutrinos on nuclei or electrons is an irreducible background for direct dark matter searches, once these experiments each the ton scale. Here, we entertain the possibility that neutrino interactions are enhanced by new physics, such as new light force carriers (for instance a "dark photon") or neutrino magnetic moments. We consider models with only the three standard neutrino flavors, as well as scenarios with extra sterile neutrinos. We find that low-energy neutrino--electron and neutrino--nucleus scattering rates can be enhanced by several orders of magnitude, potentially enough to explain the event excesses observed in CoGeNT and CRESST. We also investigate temporal modulation in these neutrino signals, which can arise from geometric effects, oscillation physics, non-standard neutrino energy loss, and direction-dependent detection efficiencies. We emphasize that, in addition to providing potential explanations for existing signals, models featuring new physics in the neutrino sector can also be very relevant to future dark matter searches, where, on the one hand, they can be probed and constrained, but on the other hand, their signatures could also be confused with dark matter signals.},
doi = {10.1088/1475-7516/2012/07/026},
journal = {JCAP},
number = ,
volume = 1207,
place = {United States},
year = {2012},
month = {2}
}