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Title: Direct detection of sub-GeV dark matter with scintillating targets

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Publication Date:
Sponsoring Org.:
OSTI Identifier:
Grant/Contract Number:
DESC0008061; FG02-09ER16052; AC02-05CH11231
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; Journal Issue: 1; Related Information: CHORUS Timestamp: 2017-07-28 22:09:42; Journal ID: ISSN 2470-0010
American Physical Society
Country of Publication:
United States

Citation Formats

Derenzo, Stephen, Essig, Rouven, Massari, Andrea, Soto, Adrián, and Yu, Tien-Tien. Direct detection of sub-GeV dark matter with scintillating targets. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.96.016026.
Derenzo, Stephen, Essig, Rouven, Massari, Andrea, Soto, Adrián, & Yu, Tien-Tien. Direct detection of sub-GeV dark matter with scintillating targets. United States. doi:10.1103/PhysRevD.96.016026.
Derenzo, Stephen, Essig, Rouven, Massari, Andrea, Soto, Adrián, and Yu, Tien-Tien. 2017. "Direct detection of sub-GeV dark matter with scintillating targets". United States. doi:10.1103/PhysRevD.96.016026.
title = {Direct detection of sub-GeV dark matter with scintillating targets},
author = {Derenzo, Stephen and Essig, Rouven and Massari, Andrea and Soto, Adrián and Yu, Tien-Tien},
abstractNote = {},
doi = {10.1103/PhysRevD.96.016026},
journal = {Physical Review D},
number = 1,
volume = 96,
place = {United States},
year = 2017,
month = 7

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on July 28, 2018
Publisher's Accepted Manuscript

Citation Metrics:
Cited by: 12works
Citation information provided by
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  • We investigate the reconstruction capabilities of the dark matter mass and spin-independent cross section from future ton-scale direct detection experiments using germanium, xenon, or argon as targets. Adopting realistic values for the exposure, energy threshold, and resolution of dark matter experiments which will come online within 5 to 10 years, the degree of complementarity between different targets is quantified. We investigate how the uncertainty in the astrophysical parameters controlling the local dark matter density and velocity distribution affects the reconstruction. For a 50 GeV WIMP, astrophysical uncertainties degrade the accuracy in the mass reconstruction by up to a factor ofmore » {approx}4 for xenon and germanium, compared to the case when astrophysical quantities are fixed. However, the combination of argon, germanium, and xenon data increases the constraining power by a factor of {approx}2 compared to germanium or xenon alone. We show that future direct detection experiments can achieve self-calibration of some astrophysical parameters, and they will be able to constrain the WIMP mass with only very weak external astrophysical constraints.« less
  • We study how the combined observation of dark matter in various direct detection experiments can be used to determine the phenomenological properties of WIMP dark matter: mass, spin-dependent (SD) and spin-independent (SI) scattering cross section off nucleons. A convenient choice of target materials, including nuclei that couple to dark matter particles through a significantly different ratio of SD vs SI interactions, could break the degeneracies in the determination of those parameters that a single experiment cannot discriminate. In this work we investigate different targets that can be used as scintillating bolometers and could provide complementary information to germanium and xenonmore » detectors. We observe that Al{sub 2}O{sub 3} and LiF bolometers could allow a good reconstruction of the DM properties over regions of the parameter space with a SD scattering cross section as small as 10{sup −5} pb and a SI cross section as small as 5 × 10{sup −10} pb for a 50 GeV WIMP. In the case of a CaWO{sub 4} bolometer the area in which full complementarity is obtained is smaller but we show that it can be used to determine the WIMP mass and its SI cross section. For each target we study the required exposure and background.« less
  • Dark matter in the sub-GeV mass range is a theoretically motivated but largely unexplored paradigm. Such light masses are out of reach for conventional nuclear recoil direct detection experiments, but may be detected through the small ionization signals caused by dark matter-electron scattering. Semiconductors are well-studied and are particularly promising target materials because their O(1 eV) band gaps allow for ionization signals from dark matter particles as light as a few hundred keV. Current direct detection technologies are being adapted for dark matter-electron scattering. In this paper, we provide the theoretical calculations for dark matter-electron scattering rate in semiconductors, overcomingmore » several complications that stem from the many-body nature of the problem. We use density functional theory to numerically calculate the rates for dark matter-electron scattering in silicon and germanium, and estimate the sensitivity for upcoming experiments such as DAMIC and SuperCDMS. We find that the reach for these upcoming experiments has the potential to be orders of magnitude beyond current direct detection constraints and that sub-GeV dark matter has a sizable modulation signal. We also give the first direct detection limits on sub-GeV dark matter from its scattering off electrons in a semiconductor target (silicon) based on published results from DAMIC. We make available publicly our code, QEdark, with which we calculate our results. Our results can be used by experimental collaborations to calculate their own sensitivities based on their specific setup. In conclusion, the searches we propose will probe vast new regions of unexplored dark matter model and parameter space.« less
  • The halo dark matter (DM) can be captured by the Sun if its final velocity after the collision with a nucleus in the Sun is less than the escape velocity. We consider a selfinteracting dark matter (SIDM) model where U(1) gauge symmetry is introduced to account for the DM self-interaction. Such a model naturally leads to isospin violating DM-nucleon interaction, although isospin symmetric interaction is still allowed as a special case. We present the IceCube-PINGU 2σ sensitivity to the parameter range of the above model with 5 years of search for neutrino signature from DM annihilation in the Sun. Thismore » indirect detection complements the direct detection by probing those SIDM parameter ranges which are either the region for very small m{sub χ} or the region opened up due to isospin violations.« less