[Flexiblesusy-commits] [FlexibleSUSY/FlexibleSUSY] b6db61: Bugfix: correcting SM 2-loop self energy O(alpha_t...

[GitHub]

  Branch: refs/heads/development
  Home:   https://github.com/FlexibleSUSY/FlexibleSUSY
  Commit: b6db6145acd769e1f04bb0ec2c533ab67341fbcb
      https://github.com/FlexibleSUSY/FlexibleSUSY/commit/b6db6145acd769e1f04bb0ec2c533ab67341fbcb
  Author: Alexander Voigt <Alexander.Voigt at desy.de>
  Date:   2016-09-06 (Tue, 06 Sep 2016)

  Changed paths:
    M src/sm_twoloophiggs.cpp
    M test/test_HSSUSY_SUSYHD.sh

  Log Message:
  -----------
  Bugfix: correcting SM 2-loop self energy O(alpha_t^2)

Thanks to Thomas Kwasnitza.

The old expression of Eq. (20) of arxiv:1205.6497 contains 2L
contributions from the momentum iteration of the 1-loop self energy.

However, FS does the momentum iteration by default.  For this reason,
these 2-loop pieces from the 1-loop momentum iteration must not be
included in the 2-loop that we add.

The expression of Eq. (20) of arxiv:1504.05200 contains only the self
energy contribution, but without the 2-loop contribution from the
1-loop momentum iteration.  This is therefore the 2-loop expression
that we should add to the (momentum-iterated) 1-loop expression.

The effect is of the order 50 MeV.