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AMSB Input

Posted: 3. Jul 2019, 04:43
by AForster
Hi all

I am trying to make a SPheno version with one of the three boundary conditions typically generated by Anomaly mediated symmetry breaking (AMSB). that is that:
{MassB = g1^2/(16*\[Pi]^2)*33/5*m32},
{MassWB = g2^2/(16*\[Pi]^2)*m32},
{MassG = g3^2/(16*\[Pi]^2)*(-3)*m32}
at the high scale.

Therefore I would like to generate a version with MINPAR
MINPAR= {{1,m0},
{3,TanBeta},
{4,MuInput},
{5,Azero},
{6,Bzero},
{7,m32}};
(notice no m12 as there is no longer a unified gaugino mass) and I have modified BoundaryHighScale such that the boundary conditions above apply.

My issues are as follows:
(a) Now that i don't have an m12 I don't know what to use as my first guess renormalisation scale. (I have used RenormalizationScaleFirstGuess = m0^2 + m32^2 for the time being but this doesnt seem reasonable)
(b) I suspect that the default THDMII matching conditions use m12. When I modify the provided file Matching_THDMII.m in the folder Model/MSSM (to match my boundary conditions) and specify that this file should be used (using nitMatching[InputFile -> Matching_THDMII.m]) MakeSPheno[] seems to grind to a halt after calculating the vertices.

(the modifications to Matching_THDMII.m are
MassB -> g1^2/(16*\[Pi]^2)*33/5*m32,
MassWB -> g2^2/(16*\[Pi]^2)*m32,
MassG -> g3^2/(16*\[Pi]^2)*(-3)*m32,
in $ParametrisationUV and
$SPhenoMINPAR={{1,m0},
{3,TanBeta},
{4,MuInput},
{5,Azero},
{6,Bzero},
{7,m32}};
to match my SPheno.m)

Any help would be very much appreciated.

Many thanks,


Adam