HSSUSY ## HSSUSYHSSUSY (high scale supersymmetry) is an implementation of the Standard Model, matched to the MSSM at the SUSY scale, . At the SUSY scale, the quartic Higgs coupling, is predicted from the matching to the MSSM using the 1- and 2-loop threshold corrections of [arXiv:1407.4081, arxiv:1504.05200, arXiv:1703.08166]. The 3-loop renormalization group equations of [arxiv:1504.05200, arxiv:1303.4364] are used to run down to the electroweak scale. At the electroweak scale, the gauge and Yukawa couplings as well as the SM vacuum expectation value (VEV) are calculated at the 1-loop level from the known low-energy couplings , and Standard Model masses. The known 2-loop and 3-loop QCD threshold corrections for can also be taken into account [hep-ph/9305305, hep-ph/9708255, hep-ph/9707474, hep-ph/0004189] by setting the threshold corrections flag appropriately. The top Yukawa coupling is calculated at the full 1-loop level from the top pole mass, taking optionally 2-loop [hep-ph/9803493] and 3-loop [arxiv:hep-ph/9911434] corrections into account, see FlexibleSUSY configuration block (FlexibleSUSY) . In Mathematica interface an example Mathematica script can be found, which illustrates how to perform a parameter scan using the HSSUSY model. __Input parameters__ Parameter | description | input block/field --------------------------------------------|--------------------------------------------------------------|------------------ | SUSY scale | `EXTPAR[0]` | Bino mass | `EXTPAR[1]` | Wino mass | `EXTPAR[2]` | Gluino mass | `EXTPAR[3]` | -parameter | `EXTPAR[4]` | running CP-odd Higgs mass | `EXTPAR[5]` | scale at which the pole mass spectrum is calculated | `EXTPAR[5]` | trililear stop coupling | `EXTPAR[7]` | | `EXTPAR[25]` | soft-breaking left-handed squark mass parameters | `MSQ2IN` | soft-breaking right-handed up-type squark mass parameters | `MSU2IN` | soft-breaking right-handed down-type squark mass parameters | `MSD2IN` | soft-breaking left-handed slepton mass parameters | `MSL2IN` | soft-breaking right-handed down-type slepton mass parameters | `MSE2IN` __EWSB__ The 1-loop electroweak symmetry breaking condition is imposed at the scale and is used to fix the value of the bililear Higgs coupling . __Boundary conditions__ _High scale_ The high scale (`HighScale`) is fixed . At , the quartic Higgs coupling is fixed using the 1- and leading 2-loop threshold corrections of [arXiv:1407.4081, arxiv:1504.05200, arXiv:1703.08166]. _EWSB scale_ The scale at which the pole mass spectrum (including the Higgs mass) (`SUSYScale`) is calculated is the electroweak symmetry breaking scale, . _Low scale_ At the low scale (`LowScale`) the gauge and Yukawa couplings as well as the VEV are calculated from the input parameters , , , , , , , , , , , , using the approach described in [arxiv:1609.00371]. Depending on the given input flags, the top Yukawa coupling, , is calculated at the 1-loop level plus additional 2-loop [hep-ph/9803493] and 3-loop [arxiv:hep-ph/9911434] QCD corrections, see FlexibleSUSY configuration block (FlexibleSUSY) . Depending on the given input flags, the strong coupling constant, , is calculated at the 1-loop level plus additional 2-loop and 3-loop QCD corrections [hep-ph/9305305, hep-ph/9708255, hep-ph/9707474, hep-ph/0004189], see FlexibleSUSY configuration block (FlexibleSUSY) . __Pole masses__ The Standard Model pole mass spectrum is calculated at the 1-loop level. Depending on the given input flags, 2-loop corrections [arxiv:1407.4336, Eq.(2.47)] and [arxiv:1205.6497, Eq.(20)], as well as 3-loop corrections [arxiv:1407.4336] are included. **Note:**- Note, that the 3-loop contributions are incomplete, because the corresponding 2-loop threshold corrections for the running top Yukawa coupling are not implemented yet.
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