It has been widely known that bino-like dark matter in supersymmetric theories suffers from overproduction. The situation can be improved if the gluino or wino has a mass of O(10) GeV heavier than the bino, sufficiently reducing the bino abundance through co-annihilation. In this scenario, the gluino decays to the bino via squark exchange, and the wino decays to the bino via higgsino exchange. In split SUSY models favoured after the Higgs discovery, the intermediate particles in these decays would be much heavier than gauginos, suppressing the decay of the gluino and wino. This, in addition to the small mass differences, results in long lifetimes for the gluino and wino. We show that searches performed at the LHC for long-lived particles with displaced vertices offer a powerful method to test this scenario.
|Journal||Proceedings of Science|
|Publication status||Published - Jan 1 2015|
|Event||23rd European Physical Society Conference on High Energy Physics, EPS-HEP 2015 - Vienna, Austria|
Duration: Jul 22 2015 → Jul 29 2015
All Science Journal Classification (ASJC) codes