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Effect of nuclear response functions in dark matter direct detection

Gresham, Moira I. and Zurek, Kathryn M. (2014) Effect of nuclear response functions in dark matter direct detection. Physical Review D, 89 (12). Art. No. 123521. ISSN 1550-7998. https://resolver.caltech.edu/CaltechAUTHORS:20190613-164148783

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Abstract

We examine the effect of nuclear response functions, as laid out by Fitzpatrick et al. [J. Cosmol. Astropart. Phys. 02 (2013) 004], on dark matter (DM) direct detection in the context of well-motivated UV completions, including electric and magnetic dipoles, anapole, spin-orbit, and pseudoscalar-mediated DM. Together, these encompass five of the six nuclear responses extracted from the nonrelativistic effective theory of Fitzpatrick et al. [J. Cosmol. Astropart. Phys. 02 (2013) 004] (with the sixth difficult to UV complete), with two of the six combinations corresponding to standard spin-independent and spin-dependent responses. For constraints from existing direct detection experiments, we find that only the COUPP constraint, due to its heavy iodine target with large angular momentum and an unpaired spin, and its large energy range sensitivity, is substantially modified by the new responses compared to what would be inferred using the standard form factors to model the energy dependence of the response. For heavy targets such as xenon and germanium, the behavior of the new nuclear responses as recoil energy increases can be substantially different from that of the standard responses, but this has almost no impact on the constraints derived from experiments such as LUX, XENON100, and CDMS since the maximum nuclear recoil energy detected in these experiments is relatively low. We simulate mock data for 80 and 250 GeV DM candidates utilizing the new nuclear responses to highlight how they might affect a putative signal, and find the new responses are most important for highly momentum-suppressed interactions such as the magnetic dipole or pseudoscalar-mediated interaction when the target is relatively heavy (such as xenon and iodine).


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/physrevd.89.123521DOIArticle
https://arxiv.org/abs/1401.3739arXivDiscussion Paper
Alternate Title:On the Effect of Nuclear Response Functions in Dark Matter Direct Detection
Additional Information:© 2014 American Physical Society. (Received 17 February 2014; published 25 June 2014) We thank Nikhil Anand and Liam Fitzpatrick for correspondence and clarification of some of their work. The work of K. Z. is supported by NASA astrophysics theory Grant No. NNX11AI17G and by NSF CAREER Award No. PHY 1049896.
Funders:
Funding AgencyGrant Number
NASANNX11AI17G
NSFPHY-1049896
Issue or Number:12
Classification Code:PACS numbers: 95.35.+d
Record Number:CaltechAUTHORS:20190613-164148783
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190613-164148783
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96411
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:17 Jun 2019 20:26
Last Modified:03 Oct 2019 21:22

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