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Power corrections to the universal heavy WIMP-nucleon cross section

Chen, Chien-Yi and Hill, Richard J. and Solon, Mikhail P. and Wijangco, Alexander M. (2018) Power corrections to the universal heavy WIMP-nucleon cross section. Physics Letters B, 781 . pp. 473-479. ISSN 0370-2693. doi:10.1016/j.physletb.2018.04.021.

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WIMP-nucleon scattering is analyzed at order 1/M in Heavy WIMP Effective Theory. The 1/M power corrections, where M ≫ m_W is the WIMP mass, distinguish between different underlying UV models with the same universal limit and their impact on direct detection rates can be enhanced relative to naive expectations due to generic amplitude-level cancellations at leading order. The necessary one- and two-loop matching calculations onto the low-energy effective theory for WIMP interactions with Standard Model quarks and gluons are performed for the case of an electroweak SU(2) triplet WIMP, considering both the cases of elementary fermions and composite scalars. The low-velocity WIMP-nucleon scattering cross section is evaluated and compared with current experimental limits and projected future sensitivities. Our results provide the most robust prediction for electroweak triplet Majorana fermion dark matter direct detection rates; for this case, a cancellation between two sources of power corrections yields a small total 1/M correction, and a total cross section close to the universal limit for M ≳ few x 100 GeV. For the SU(2) composite scalar, the 1/M corrections introduce dependence on underlying strong dynamics. Using a leading chiral logarithm evaluation, the total 1/M correction has a larger magnitude and uncertainty than in the fermionic case, with a sign that further suppresses the total cross section. These examples provide definite targets for future direct detection experiments and motivate large scale detectors capable of probing to the neutrino floor in the TeV mass regime.

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Additional Information:© 2018 The Author(s). Published by Elsevier B.V. under a Creative Commons license - Attribution 4.0 International (CC BY 4.0). Open Access funded by SCOAP³ - Sponsoring Consortium for Open Access Publishing in Particle Physics. Received 17 February 2018, Revised 22 March 2018, Accepted 11 April 2018, Available online 13 April 2018. Editor: B. Grinstein. This article is registered under preprint number 1801.08551 CYC would like to thank C. Burgess for helpful discussions. RJH thanks TRIUMF and Perimeter Institute for hospitality. Work of MPS was supported by the Office of High Energy Physics of the U.S. DOE under Contract Numbers DE-AC02-05CH11231 and DE-SC0011632. Research at the Perimeter Institute is supported in part by the Government of Canada through NSERC and by the Province of Ontario through MEDT. TRIUMF receives federal funding via a contribution agreement with the National Research Council of Canada. Fermilab is operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.
Group:Walter Burke Institute for Theoretical Physics
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Department of Energy (DOE)DE-AC02-05CH11231
Department of Energy (DOE)DE-SC0011632
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Ontario Ministry of Economic Development and GrowthUNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Department of Energy (DOE)DE-AC02-07CH11359
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Record Number:CaltechAUTHORS:20180413-103444880
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Official Citation:Chien-Yi Chen, Richard J. Hill, Mikhail P. Solon, Alexander M. Wijangco, Power corrections to the universal heavy WIMP-nucleon cross section, Physics Letters B, Volume 781, 2018, Pages 473-479, ISSN 0370-2693,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85826
Deposited By: George Porter
Deposited On:13 Apr 2018 17:55
Last Modified:15 Nov 2021 20:32

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