[Flexiblesusy-commits] [FlexibleSUSY/FlexibleSUSY] af4eb1: clean-up getGaugeMu()

[GitHub]

  Branch: refs/heads/feature-2.0
  Home:   https://github.com/FlexibleSUSY/FlexibleSUSY
  Commit: af4eb15aba965f9099c6b114d68a705f7c3b531d
      https://github.com/FlexibleSUSY/FlexibleSUSY/commit/af4eb15aba965f9099c6b114d68a705f7c3b531d
  Author: Alexander Voigt <Alexander.Voigt at physik.rwth-aachen.de>
  Date:   2017-09-23 (Sat, 23 Sep 2017)

  Changed paths:
    M src/lowe.cpp

  Log Message:
  -----------
  clean-up getGaugeMu()


  Commit: 123c7453d741b3ee0f1fdad403630de0a83f4c94
      https://github.com/FlexibleSUSY/FlexibleSUSY/commit/123c7453d741b3ee0f1fdad403630de0a83f4c94
  Author: Alexander Voigt <Alexander.Voigt at physik.rwth-aachen.de>
  Date:   2017-09-23 (Sat, 23 Sep 2017)

  Changed paths:
    M src/lowe.cpp
    M src/lowe.h
    M src/standard_model.cpp
    M templates/semi_analytic_high_scale_initial_guesser.cpp.in
    M templates/semi_analytic_low_scale_initial_guesser.cpp.in
    M templates/standard_model_two_scale_high_scale_initial_guesser.cpp.in
    M templates/standard_model_two_scale_low_scale_initial_guesser.cpp.in
    M templates/two_scale_high_scale_initial_guesser.cpp.in
    M templates/two_scale_low_scale_initial_guesser.cpp.in

  Log Message:
  -----------
  correcting initial guess of SM(5) coupling constants

SOFTSUSY guesses the couplings of the SM(6) if Q > mt.  However, this
leads to a wrong guess in FS, where we assume that the QedQcd class
returns the couplings of the SM(5).  This commit fixes this issue.

Guess in SOFTSUSY (SM(6)):

 {alpha_1, alpha_2, alpha_3} = {0.0168674, 0.0345517, 0.107913}

Guess in FS (SM(5)) now:

 {alpha_1, alpha_2, alpha_3} = {0.0167817, 0.0351789, 0.107913}

The new initial guess in FS (SM(5)) is also closer to the true SM(5)
couplings (at MZ) after the iteration has converged:

 {alpha_1, alpha_2, alpha_3} = {0.0167694, 0.0350305, 0.1184}

So, the initial guess is now closer to the final SM(5) couplings,
which should improve convergence.


Compare: https://github.com/FlexibleSUSY/FlexibleSUSY/compare/7f9257382e49...123c7453d741