Two new papers on dark matter by Carleton theory postdoc Dr. Brooks Thomas

Thursday, July 17, 2014

Carleton theory group postdoc Dr. Brooks Thomas has recently completed two new papers on dark matter with U.S. collaborators:

  • K. R. Dienes, J. Kumar, B. Thomas, and D. Yaylali, "A New Direction in Dark-Matter Complementarity," arXiv:1406.4868. This paper looks at the possibility that there is more than one type of dark matter particle, in which case a heavier dark matter particle can decay into a lighter one. This possibility can be constrained using data from both gamma-ray telescopes (looking for the gamma emission in the dark matter decay process) and dark matter direct-detection experiments (looking for exothermic or endothermic scatterings of a dark matter particle off a nucleus, when the outgoing dark matter particle is lighter or heavier, respectively, than the incoming one).
  • K. R. Dienes, S. Su, and B. Thomas, "Strategies for Probing Non-Minimal Dark Sectors at Colliders: The Interplay Between Cuts and Kinematic Distributions," arXiv:1407.2606. This paper examines some useful kinematic variables for studying collider events in which dark matter particles are produced when there is more than one type of dark matter particle.  In particular, it looks at how the experimental cuts used to reduce backgrounds can "sculpt" these kinematic distributions, potentially causing confusion but also opening the possibility to use clever combinations of kinematic variables to learn more about the dark sector.