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Title: Light mediators in dark matter direct detections

Abstract

In an extended effective operator framework, we investigate in detail the effects of light mediators on the event spectra of dark matter (DM)-nucleus scatterings. The presence of light mediators changes the interpretation of the current experimental data, especially the determination of DM particle mass. We show by analytic and numerical illustrations that in general for all the operators relevant to spin-independent scatterings, the DM particle mass allowed by a given set of experimental data increases significantly when the mediator particle becomes lighter. For instance, in the case of CDMS-II-Si experiment, the allowed DM particle mass can reach ∼50 (100) GeV at 68% (90%) confidence level, which is much larger than ∼10 GeV in the case with contact interactions. The increase of DM particle mass saturates when the mediator mass is below O(10) MeV. The upper limits from other experiments such as SuperCDMS, CDMSlite, CDEX, XENON10/100, LUX, PandaX etc. all tend to be weaker toward high DM mass regions. In a combined analysis, we show that the presence of light mediators can partially relax the tension in the current results of CDMS-II-Si, SuperCDMS and LUX.

Authors:
; ;  [1];  [2];  [2]
  1. State Key Laboratory of Theoretical Physics, Beijing, 100190 (China)
  2. (China)
Publication Date:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22454528
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 03; Other Information: PUBLISHER-ID: JCAP03(2015)032; OAI: oai:repo.scoap3.org:9621; Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DETECTION; ELEMENTARY PARTICLES; EXPERIMENTAL DATA; GEV RANGE; MASS; MEV RANGE; NONLUMINOUS MATTER; NUCLEI; SCATTERING; SPECTRA; SPIN

Citation Formats

Li, Tai, Miao, Sen, Zhou, Yu-Feng, Kavli Institute for Theoretical Physics China, Beijing, 100190, and Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190. Light mediators in dark matter direct detections. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/03/032.
Li, Tai, Miao, Sen, Zhou, Yu-Feng, Kavli Institute for Theoretical Physics China, Beijing, 100190, & Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190. Light mediators in dark matter direct detections. United States. doi:10.1088/1475-7516/2015/03/032.
Li, Tai, Miao, Sen, Zhou, Yu-Feng, Kavli Institute for Theoretical Physics China, Beijing, 100190, and Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190. Tue . "Light mediators in dark matter direct detections". United States. doi:10.1088/1475-7516/2015/03/032.
@article{osti_22454528,
title = {Light mediators in dark matter direct detections},
author = {Li, Tai and Miao, Sen and Zhou, Yu-Feng and Kavli Institute for Theoretical Physics China, Beijing, 100190 and Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190},
abstractNote = {In an extended effective operator framework, we investigate in detail the effects of light mediators on the event spectra of dark matter (DM)-nucleus scatterings. The presence of light mediators changes the interpretation of the current experimental data, especially the determination of DM particle mass. We show by analytic and numerical illustrations that in general for all the operators relevant to spin-independent scatterings, the DM particle mass allowed by a given set of experimental data increases significantly when the mediator particle becomes lighter. For instance, in the case of CDMS-II-Si experiment, the allowed DM particle mass can reach ∼50 (100) GeV at 68% (90%) confidence level, which is much larger than ∼10 GeV in the case with contact interactions. The increase of DM particle mass saturates when the mediator mass is below O(10) MeV. The upper limits from other experiments such as SuperCDMS, CDMSlite, CDEX, XENON10/100, LUX, PandaX etc. all tend to be weaker toward high DM mass regions. In a combined analysis, we show that the presence of light mediators can partially relax the tension in the current results of CDMS-II-Si, SuperCDMS and LUX.},
doi = {10.1088/1475-7516/2015/03/032},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 03,
volume = 2015,
place = {United States},
year = {Tue Mar 17 00:00:00 EDT 2015},
month = {Tue Mar 17 00:00:00 EDT 2015}
}