Many warnings in Messages.out

[Socob]

Running any SARAH-generated SPheno version produces a file called “Messages.out” containing some warnings. For example, for the SARAH model SM+Triplet/Real, running “bin/SPhenoTSM LesHouches.in.TSM” gives

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 sugra            1 .-iteration
 sugra            2 .-iteration
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 C0: lambda(p1,p2,p3) < 0, unphysical configuration
 … [repeated many times]
 Higgs mass outside range of cross section fit (gluon fusion):            1
 Higgs mass outside range of cross section fit (vector boson fusion):            1
 Higgs mass outside range of cross section fit (associated W production):            1
 Higgs mass outside range of cross section fit (associated Z production):            1
 Higgs mass outside range of cross section fit (associated top production):            1
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0
 Problem in Function B0, divergence for k->0, m1=m2=0

What is the origin/meaning of these warnings? Do I need to worry about them? In particular, why does it mention “sugra” when this model doesn’t really have anything to do with that?

[FStaub]

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 Problem in Function B0, divergence for k->0, m1=m2=0

Comes for instance from the neutriino corrections to the Z-selfenergies when using p2=0. However, this gets later multiplied by zero (the neutrino mass).

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 C0: lambda(p1,p2,p3) < 0, unphysical configuration

It's correct that SARAH calculates decays p1->p2 p3 at the loop level even if m1 is not bigger than m2+m3. The reason is that external Z-factors are used, where the decay amplitudes later are rotated to mass eigenstates.

Well, 'sugra' is still there since nobody changed it when SPheno/SARAH became independent of SUSY & supergravity.

Cheers,
Florian

[FStaub]

Hi,

unrelated to the question, but also important for you: I just recognised that there is a bug in the TSM model file. It must be

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DEFINITION[EWSB][VEVs]= 
{     {H0, {v, 1/Sqrt[2]}, {Ah, \[ImaginaryI]/Sqrt[2]},{phiH, 1/Sqrt[2]}},
      {T0, {vT, 1/Sqrt[2]}, {0, 0},{phiT,1}} }; 

The 1/Sqrt[2] for phiT was wrong because this leads to kinetic terms which are not canonical normalised.

Cheers,
Florian