Pseudo-Dirac dark matter
Abstract
Resolving the nature of dark matter has become one of the foremost goals of particle physics. Pseudo-Dirac dark matter (pDDM) is a viable scenario featuring a Dirac fermion with two mass eigenstates split by a small Majorana mass term. The compatibility of pDDM with cosmological observation has been investigated as well as negative results from direct detection experiments. Additionally, the possibility of direct production at colliders such as the LHC has been studied, revealing a distinct new signal for dark matter: observable displaced vertices resulting from the decay from the heavier mass eigenstate to the lighter. Measurement of this displaced vertex as well as the invariant mass distribution of the decay products is then sufficient to determine the entire pDDM mass spectrum.
- Publication:
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Masters Thesis
- Pub Date:
- July 2011
- Bibcode:
- 2011MsT.........10S
- Keywords:
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- Physics, Theory;Physics, Elementary Particles and High Energy