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Title: Discriminating WIMP-nucleus response functions in present and future XENON-like direct detection experiments

Abstract

The standard interpretation of direct-detection limits on dark matter involves particular assumptions of the underlying WIMP-nucleus interaction, such as, in the simplest case, the choice of a Helm form factor that phenomenologically describes an isoscalar spin-independent interaction. In general, the interaction of dark matter with the target nuclei may well proceed via different mechanisms, which would lead to a different shape of the corresponding nuclear structure factors as a function of the momentum transfer q. We study to what extent different WIMP-nucleus responses can be differentiated based on the q -dependence of their structure factors (or “form factors”). We assume an overall strength of the interaction consistent with present spin-independent limits and consider an exposure corresponding to XENON1T-like, XENONnT-like, and DARWIN-like direct detection experiments. We find that, as long as the interaction strength does not lie too much below current limits, the DARWIN settings allow a conclusive discrimination of many different response functions based on their q-dependence, with immediate consequences for elucidating the nature of dark matter.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1439496
Alternate Identifier(s):
OSTI ID: 1498966
Grant/Contract Number:  
FG02-00ER41132
Resource Type:
Published Article
Journal Name:
Physical Review. D.
Additional Journal Information:
Journal Name: Physical Review. D. Journal Volume: 97 Journal Issue: 10; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Fieguth, A., Hoferichter, M., Klos, P., Menéndez, J., Schwenk, A., and Weinheimer, C. Discriminating WIMP-nucleus response functions in present and future XENON-like direct detection experiments. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.97.103532.
Fieguth, A., Hoferichter, M., Klos, P., Menéndez, J., Schwenk, A., & Weinheimer, C. Discriminating WIMP-nucleus response functions in present and future XENON-like direct detection experiments. United States. https://doi.org/10.1103/PhysRevD.97.103532
Fieguth, A., Hoferichter, M., Klos, P., Menéndez, J., Schwenk, A., and Weinheimer, C. Wed . "Discriminating WIMP-nucleus response functions in present and future XENON-like direct detection experiments". United States. https://doi.org/10.1103/PhysRevD.97.103532.
@article{osti_1439496,
title = {Discriminating WIMP-nucleus response functions in present and future XENON-like direct detection experiments},
author = {Fieguth, A. and Hoferichter, M. and Klos, P. and Menéndez, J. and Schwenk, A. and Weinheimer, C.},
abstractNote = {The standard interpretation of direct-detection limits on dark matter involves particular assumptions of the underlying WIMP-nucleus interaction, such as, in the simplest case, the choice of a Helm form factor that phenomenologically describes an isoscalar spin-independent interaction. In general, the interaction of dark matter with the target nuclei may well proceed via different mechanisms, which would lead to a different shape of the corresponding nuclear structure factors as a function of the momentum transfer q. We study to what extent different WIMP-nucleus responses can be differentiated based on the q -dependence of their structure factors (or “form factors”). We assume an overall strength of the interaction consistent with present spin-independent limits and consider an exposure corresponding to XENON1T-like, XENONnT-like, and DARWIN-like direct detection experiments. We find that, as long as the interaction strength does not lie too much below current limits, the DARWIN settings allow a conclusive discrimination of many different response functions based on their q-dependence, with immediate consequences for elucidating the nature of dark matter.},
doi = {10.1103/PhysRevD.97.103532},
journal = {Physical Review. D.},
number = 10,
volume = 97,
place = {United States},
year = {Wed May 30 00:00:00 EDT 2018},
month = {Wed May 30 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevD.97.103532

Citation Metrics:
Cited by: 7 works
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Figures / Tables:

FIG. 1. FIG. 1. : Diagrams for WIMP-nucleon interactions in chiral EFT: (a) a single-nucleon contribution. (b) A momentum-dependent radius correction. (c) The coupling via a two-body current. Solid (dashed) lines refer to nucleons (pions) and crosses indicate the coupling to the WIMP.

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