Direct detection with dark mediators

Curtin, David; Surujon, Ze'ev; Tsai, Yuhsin

doi:10.1016/j.physletb.2014.10.027

Title: Direct detection with dark mediators

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Abstract

We introduce dark mediator Dark Matter (dmDM) where the dark and visible sectors are connected by at least one light mediator Φ carrying the same dark charge that stabilizes DM. Φ is coupled to the Standard Model via an operator q¯qΦΦ*/Λ, and to dark matter via a Yukawa coupling y_χX¯^cXΦ. Direct detection is realized as the 2 → 3 process χN → χ¯NΦ at tree-level for m_Φ≲10 keV and small Yukawa coupling, or alternatively as a loop-induced 2 → 2 process χN → χN. We explore the direct-detection consequences of this scenario and find that a heavy O(100 GeV) dmDM candidate fakes different O(10 GeV) standard WIMPs in different experiments. Large portions of the dmDM parameter space are detectable above the irreducible neutrino background and not yet excluded by any bounds. Interestingly, for the m_Φ range leading to novel direct detection phenomenology, dmDM is also a form of Self-Interacting Dark Matter (SIDM), which resolves inconsistencies between dwarf galaxy observations and numerical simulations.

Authors:

Curtin, David; Surujon, Ze'ev;

Publication Date:: Sat Nov 01 00:00:00 EDT 2014

Research Org.:: Univ. of California, Davis, CA (United States). Physics Dept.

Sponsoring Org.:: USDOE

OSTI Identifier:: 1209781

Alternate Identifier(s):: OSTI ID: 1213414

Grant/Contract Number:: FG02-91ER40674

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 738 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Curtin, David, Surujon, Ze'ev, and Tsai, Yuhsin. Direct detection with dark mediators.  Netherlands: N. p., 2014. 
Web.  doi:10.1016/j.physletb.2014.10.027.

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                    Curtin, David, Surujon, Ze'ev, & Tsai, Yuhsin. Direct detection with dark mediators.  Netherlands.  https://doi.org/10.1016/j.physletb.2014.10.027

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                    Curtin, David, Surujon, Ze'ev, and Tsai, Yuhsin. Sat .  
"Direct detection with dark mediators".  Netherlands.  https://doi.org/10.1016/j.physletb.2014.10.027.

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@article{osti_1209781,

  title        = {Direct detection with dark mediators},

  author       = {Curtin, David and Surujon, Ze'ev and Tsai, Yuhsin},

  abstractNote = {We introduce dark mediator Dark Matter (dmDM) where the dark and visible sectors are connected by at least one light mediator Φ carrying the same dark charge that stabilizes DM. Φ is coupled to the Standard Model via an operator q¯qΦΦ*/Λ, and to dark matter via a Yukawa coupling yχX¯cXΦ. Direct detection is realized as the 2 → 3 process χN → χ¯NΦ at tree-level for mΦ≲10 keV and small Yukawa coupling, or alternatively as a loop-induced 2 → 2 process χN → χN. We explore the direct-detection consequences of this scenario and find that a heavy O(100 GeV) dmDM candidate fakes different O(10 GeV) standard WIMPs in different experiments. Large portions of the dmDM parameter space are detectable above the irreducible neutrino background and not yet excluded by any bounds. Interestingly, for the mΦ range leading to novel direct detection phenomenology, dmDM is also a form of Self-Interacting Dark Matter (SIDM), which resolves inconsistencies between dwarf galaxy observations and numerical simulations.},

  doi          = {10.1016/j.physletb.2014.10.027},

  journal      = {Physics Letters B},

  number       = C,

  volume       = 738,

  place        = {Netherlands},

  year         = {Sat Nov 01 00:00:00 EDT 2014},

  month        = {Sat Nov 01 00:00:00 EDT 2014}

}

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