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arXiv · 1301.1693

Lattice calculation of composite dark matter form factors

T. Appelquist·R. C. Brower·M. I. Buchoff·M. Cheng·S. D. Cohen·G. T. Fleming·J. Kiskis·M. F. Lin·E. T. Neil·J. C. Osborn·C. Rebbi·D. Schaich·C. Schroeder·S. N. Syritsyn·G. Voronov·P. Vranas·J. Wasem
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Abstract

Composite dark matter candidates, which can arise from new strongly-coupled sectors, are well-motivated and phenomenologically interesting, particularly in the context of asymmetric generation of the relic density. In this work, we employ lattice calculations to study the electromagnetic form factors of electroweak-neutral dark-matter baryons for a three-color, QCD-like theory with Nf = 2 and 6 degenerate fermions in the fundamental representation. We calculate the (connected) charge radius and anomalous magnetic moment, both of which can play a significant role for direct detection of composite dark matter. We find minimal Nf dependence in these quantities. We generate mass-dependent cross-sections for dark matter-nucleon interactions and use them in conjunction with experimental results from XENON100, excluding dark matter candidates of this type with masses below 10 TeV.

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T. Appelquist, R. C. Brower, M. I. Buchoff, M. Cheng, S. D. Cohen, G. T. Fleming, J. Kiskis, M. F. Lin, E. T. Neil, J. C. Osborn, C. Rebbi, D. Schaich, C. Schroeder, S. N. Syritsyn, G. Voronov, P. Vranas, J. Wasem. 2013-07-18. Lattice calculation of composite dark matter form factors. https://doi.org/10.1103/physrevd.88.014502

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