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Title: Shining LUX on isospin-violating dark matter beyond leading order

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1197961
Grant/Contract Number:
AC52-06NA25396
Resource Type:
Journal Article: Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 739; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-28 17:01:08; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Cirigliano, Vincenzo, Graesser, Michael L., Ovanesyan, Grigory, and Shoemaker, Ian M.. Shining LUX on isospin-violating dark matter beyond leading order. Netherlands: N. p., 2014. Web. doi:10.1016/j.physletb.2014.10.058.
Cirigliano, Vincenzo, Graesser, Michael L., Ovanesyan, Grigory, & Shoemaker, Ian M.. Shining LUX on isospin-violating dark matter beyond leading order. Netherlands. doi:10.1016/j.physletb.2014.10.058.
Cirigliano, Vincenzo, Graesser, Michael L., Ovanesyan, Grigory, and Shoemaker, Ian M.. 2014. "Shining LUX on isospin-violating dark matter beyond leading order". Netherlands. doi:10.1016/j.physletb.2014.10.058.
@article{osti_1197961,
title = {Shining LUX on isospin-violating dark matter beyond leading order},
author = {Cirigliano, Vincenzo and Graesser, Michael L. and Ovanesyan, Grigory and Shoemaker, Ian M.},
abstractNote = {},
doi = {10.1016/j.physletb.2014.10.058},
journal = {Physics Letters. Section B},
number = C,
volume = 739,
place = {Netherlands},
year = 2014,
month =
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.physletb.2014.10.058

Citation Metrics:
Cited by: 22works
Citation information provided by
Web of Science

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  • Cited by 19
  • We study a simple model that can give rise to isospin-violating interactions of Dirac fermion asymmetric dark matter to protons and neutrons through the interference of a scalar and U(1)' gauge boson contribution. The model can yield a large suppression of the elastic scattering cross section off Xenon relative to Silicon thus reconciling CDMS-Si and LUX results while being compatible with LHC findings on the 126 GeV Higgs, electroweak precision tests and flavour constraints.
  • Isospin-violating dark matter (IVDM) provides a possible mechanism to ameliorate the tension among recent direct detection experiments. For IVDM, we demonstrate that the results of direct detection experiments based on neutron-rich target nuclei may depend strongly on the density dependence of the symmetry energy which is presently largely unknown and controls the neutron skin thickness that reflects the relative difference of neutron and proton form factors in the neutron-rich nuclei. In particular, using the neutron and proton form factors obtained from Skyrme-Hartree-Fock calculations by varying the symmetry energy within the uncertainty region set by the latest model-independent measurement of themore » neutron skin thickness of {sup 208}Pb from PREX experiment at JLab, we find that, for IVDM with neutron-to-proton coupling ratio fixed to f{sub n}/f{sub p}=-0.7, the form factor effect may enhance the sensitivity of Xe-based detectors (e.g., XENON100 and LUX) to the DM-proton cross section by a factor of 3 in the DM mass region constrained by CMDS-II(Si) and even by more than an order of magnitude for heavy DM with mass larger than 80 GeV, compared with the results using the empirical Helm form factor. Our results further indicate that the form factor effect can significantly modify the recoil spectrum of Xe-based detectors for heavy IVDM with f{sub n}/f{sub p}=-0.7.« less