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Scattering of Dark Particles with Light Mediators

Soper, Davison E.; Spannowsky, Michael; Wallace, Christopher; Tait, Tim M.P.

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Davison E. Soper

Christopher Wallace

Tim M.P. Tait


We present a treatment of the high energy scattering of dark Dirac fermions from nuclei, mediated by the exchange of a light vector boson. The dark fermions are produced by proton-nucleus interactions in a fixed target and, after traversing shielding that screens out strongly interacting products, appear similarly to neutrino neutral current scattering in a detector. Using the Fermilab experiment E613 as an example, we place limits on a secluded dark matter scenario. Visible scattering in the detector includes both the familiar regime of large momentum transfer to the nucleus (Q2) described by deeply inelastic scattering, as well as small Q2 kinematics described by the exchanged vector mediator fluctuating into a quark-antiquark pair whose interaction with the nucleus is described by a saturation model. We find that the improved description of the low Q2 scattering leads to important corrections, resulting in more robust constraints in a regime where a description entirely in terms of deeply inelastic scattering cannot be trusted.


Soper, D. E., Spannowsky, M., Wallace, C., & Tait, T. M. (2014). Scattering of Dark Particles with Light Mediators. Physical Review D, 90(11), Article 115005.

Journal Article Type Article
Publication Date Dec 3, 2014
Deposit Date Dec 12, 2014
Publicly Available Date Apr 27, 2015
Journal Physical Review D
Print ISSN 1550-7998
Electronic ISSN 1550-2368
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 90
Issue 11
Article Number 115005


Published Journal Article (618 Kb)

Copyright Statement
Reprinted with permission from the American Physical Society: Physical Review D 90, 115005 © 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.

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