Muon-induced neutrons do not explain the DAMA data

Abstract

We present an accurate model of the muon-induced background in the DAMA/LIBRA experiment. Our work challenges proposed mechanisms which seek to explain the observed DAMA signal modulation with muon-induced backgrounds. Muon generation and transport are performed using the MUSIC/MUSUN code, and subsequent interactions in the vicinity of the DAMA detector cavern are simulated with Geant4. We estimate the total muon-induced neutron flux in the detector cavern to be ${\Phi }_n^{\nu }=1.0\times 10^{-9}$ cm${}^{-2}$ s${}^{-1}$. We predict $3.49\times 10^{-5}$ counts/day/kg/keV, which accounts for less than $0.3\%$ of the DAMA signal modulation amplitude.

6 pages, 4 figures, accepted for publication in PRL

References in corpus (15)

• Dark Matter Results from 225 Live Days of XENON100 Data
• Search for Low-Mass WIMPs with SuperCDMS
• Results from a Low-Energy Analysis of the CDMS II Germanium Data
• The DAMA/LIBRA apparatus
• Muon simulation codes MUSIC and MUSUN for underground physics
• A search for low-mass WIMPs with EDELWEISS-II heat-and-ionization detectors
• Limits on light WIMPs from the CDEX-1 experiment with a p-type point-contact germanium detector at the China Jingping Underground Laboratory
• Fitting the annual modulation in DAMA with neutrons from muons and neutrinos
• No role for neutrons, muons and solar neutrinos in the DAMA annual modulation results
• Muon-induced background in the EDELWEISS dark matter search
• Measurements of neutrons produced by high-energy muons at the Boulby Underground Laboratory
• A testable conventional hypothesis for the DAMA-LIBRA annual modulation
• Neutron Background Studies for the CRESST Dark Matter Experiment
• A. Fluka Study of Underground Cosmogenic Neutron Production
• Comment on "Fitting the annual modulation in DAMA with neutrons from muons and neutrinos''

Cited by in corpus (1)

• The Past and Future of Light Dark Matter Direct Detection