Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-11-03
JHEP 0512:011,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
44 pages, 21 figures
Scientific paper
10.1088/1126-6708/2005/12/011
In supersymmetric models with non-universal gaugino masses, it is possible to have opposite-sign SU(2) and U(1) gaugino mass terms. In these models, the gaugino eigenstates experience little mixing so that the lightest SUSY particle remains either pure bino or pure wino. The neutralino relic density can only be brought into accord with the WMAP measured value when bino-wino co-annihilation (BWCA) acts to enhance the dark matter annihilation rate. We map out parameter space regions and mass spectra which are characteristic of the BWCA scenario. Direct and indirect dark matter detection rates are shown to be typically very low. At collider experiments, the BWCA scenario is typified by a small mass gap m_{\tilde Z_2}-m_{\tilde Z_1} ~ 20-80 GeV, so that tree level two body decays of \tilde Z_2 are not allowed. However, in this case the second lightest neutralino has an enhanced loop decay branching fraction to photons. While the photonic neutralino decay signature looks difficult to extract at the Fermilab Tevatron, it should lead to distinctive events at the CERN LHC and at a linear e^+e^- collider.
Baer Howard
Krupovnickas Tadas
Mustafayev Azar
Park Eun-Kyung
Profumo Stefano
No associations
LandOfFree
Exploring the BWCA (Bino-Wino Co-Annihilation) Scenario for Neutralino Dark Matter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Exploring the BWCA (Bino-Wino Co-Annihilation) Scenario for Neutralino Dark Matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exploring the BWCA (Bino-Wino Co-Annihilation) Scenario for Neutralino Dark Matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-57971