Scattering of Dark Particles with Light Mediators

Abstract

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 ($Q^2$) described by deeply inelastic scattering, as well as small $Q^2$ 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 $Q^2$ 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.

23 pages, 10 figures

References in corpus (15)

• Dark Matter Results from 225 Live Days of XENON100 Data
• FeynRules - Feynman rules made easy
• New Fixed-Target Experiments to Search for Dark Gauge Forces
• Constraints on Dark Matter from Colliders
• The Tevatron at the Frontier of Dark Matter Direct Detection
• Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
• Probing a Secluded U(1) at B-factories
• Discovering New Light States at Neutrino Experiments
• Search for Dark Matter and Large Extra Dimensions in pp Collisions Yielding a Photon and Missing Transverse Energy
• New weakly-coupled forces hidden in low-energy QCD
• Signatures of sub-GeV dark matter beams at neutrino experiments
• LHC and ILC probes of hidden-sector gauge bosons
• Daily Modulation as a Smoking Gun of Dark Matter with Significant Stopping
• Halo Independent Direct Detection of Momentum-Dependent Dark Matter
• Parton distribution function for quarks in an s-channel approach

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• $Z^{\prime }$-portal right-handed neutrino dark matter in the minimal U(1)${}_X$ extended Standard Model
• Inelastic Dark Matter at the Fermilab Short Baseline Neutrino Program
• Can millicharge be probed at future Super Tau Charm Facility via mono-${\pi }^0$ searches?