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Abstract: We present an overview of supersymmetry searches, both at colliderexperiments and via searches for dark matter DM. We focus on three DMpossibilities in the SUSY context: the thermally produced neutralino, a mixtureof axion and axino, and the gravitino, and compare and contrast signals thatmay be expected at colliders, in direct detection DD experiments searching ofDM relics left over from the Big Bang, and indirect detection ID experimentsdesigned to detect the products of DM annihilations within the solar interioror galactic halo. Detection of DM particles using multiple strategies providescomplementary information that may shed light on the new physics associatedwith the dark matter sector. In contrast to the mSUGRA model where the measuredcold DM relic density restricts us to special regions mostly on the edge of them 0-m {1-2} plane, the entire parameter plane becomes allowed if theuniversality assumption is relaxed in models with just one additionalparameter. Then, thermally produced neutralinos with a well-tempered mix ofwino, bino and higgsino components, or with a mass adjusted so that theirannihilation in the early universe is Higgs-resonance-enhanced, can be the DM.Well-tempered neutralinos typically yield heightened rates for DD and IDexperiments compared to generic predictions from minimal supergravity. Ifinstead DM consists of axinos possibly together with axions or gravitinos,then there exists the possibility of detection of quasi-stable next-to-lightestSUSY particles at colliding beam experiments, with especially strikingconsequences if the NLSP is charged, but no DD or ID detection. The exceptionfor mixed axion-axino DM is that DD of axions may be possible.



Author: Howard Baer, Eun-Kyung Park, Xerxes Tata

Source: https://arxiv.org/







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