Abstract
It is widely thought that increasing bounds on the gluino mass, which feeds down to the stop mass through renormalization group running, are making a light stop increasingly unlikely. Here we present a counter-example. We examine the case of the Minimal Composite Supersymmetric Standard Model which has a light composite stop. The large anomalous dimension of the stop from strong dynamics pushes the stop mass toward a quasi-fixed point in the infrared, which is smaller than standard estimates by a factor of a large logarithm. The gluino can be about three times heavier than the stop, which is comparable to hierarchy achieved with supersoft Dirac gluino masses. Thus, in this class of models, a heavy gluino is not necessarily indicative of a heavy stop.
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ArXiv ePrint: 1511.08216
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Cleary, K.F., Terning, J. A light stop with a heavy gluino: enlarging the stop gap. J. High Energ. Phys. 2016, 151 (2016). https://doi.org/10.1007/JHEP05(2016)151
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DOI: https://doi.org/10.1007/JHEP05(2016)151