Regular Article - Theoretical Physics
Light stops and fine-tuning in MSSM
Department of Physics, Uludag̃ University, TR16059, Bursa, Turkey
* e-mail: email@example.com
Accepted: 13 January 2018
Published online: 23 January 2018
We discuss the fine-tuning issue within the MSSM framework. Following the idea that the fine-tuning can measure effects of some missing mechanism, we impose non-universal gaugino masses at the GUT scale, and explore the low scale implications. We realize that the fine-tuning parametrized with can be as low as zero. We consider the stop mass with a special importance and focus on the mass scales as GeV, which are excluded by the current experiments when the stop decays into a neutralino along with a top quark or a chargino along with a bottom quark. We find that the stop mass can be as low as about 250 GeV with . We find that the solutions in this region can be exluded only up to when stop decays into a neutralino-top quark, and when it decays into a chargino-b quark. Setting CL to be potential exclusion and to be pure exclusion limit such solutions will be tested in near future experiments, which are conducted with higher luminosity. In addition to stop, the region with low fine-tuning and light stops predicts masses for the other supersymmetric particles such as GeV, TeV, GeV. The details for the mass scales and decay rates are also provided by tables of benchmark points.
© The Author(s), 2018