==========================
SARAH 3.1.0: Changelog
==========================
Madgraph/UFO-Output:
- Fully validated (cross checked against MSSM model files delivered with Madgraph 5.1.4.6).
Lagrangian:
- Gauge fixing terms are added automatically by SARAH: derived in R_Xi by demanding vanishing scalar-vector mixing
- Mass matrices for Goldstones are written including the gauge fixing part
Group theory (thanks to Tomas Gonzales):
- Improvement in speed to find Young tableaux for higher-dimensional representations
- Solved problem with generators of SU(N) gauge groups for N > 3
Loop corrections:
- Ghost contributions to tadpoles given explicitly (no longer absorbed in vector boson contributions)
- Ghost contributions to scalar self-energy given explicitly (no longer absorbed in vector bosons contributions)
- Ghost contributions as well as 4-point contributions to vector self-energies given explicitly (no longer absorbed in vector bosons contributions)
=> first step towards a calculation in general R_Xi gauge
CalcRGEs:
- Option to neglect specific couplings in the 2-loop RGEs; might be demanded to keep some expressions shorter
SPheno-Output:
- Included check in Makefile if SPheno version is supported
- Removed loop functions from LowEnergy_Model.f90 which are now part of LoopFunctions.f90 in SPheno (=> demands SPheno 3.1.11)
- Support of Ghost and 4-point vector boson interactions corresponding to the changes in the loop calculations
- Improved calculation of decays: running couplings are calculated at the mass scale of the decaying particle
- New low energy constraints implemented:
* mu - e conversion in nuclei (Cr(mu-e,X) with X = Ti, Al, Pb,Au,Sr, Sb )
* tau decays into mesons (tau -> l P with l=e,mu; P = pi, eta, eta')
* Lepton flavor violating Z-decays (Z -> l_i l_j) (by Kilian Nickel)
- Flag to switch off 2-loop Higgs corrections is changed from 56 to 7 to be consistent with the standard SPheno conventions
TeX-Output:
- Include gauge fixing contributions to mass matrices
- Print the automatically generated gauge fixing terms in output
- Output of 1-loop corrections to tadpoles, scalars and vectors adjusted to new loop routines
Models:
- Removed gauge fixing terms in all model files
- B-L-SSM: changed definition of neutrino Yukawa coupling from Y^{ij}_nu l_i nu^c_j to Y^{ij}_nu nu^c_i l_j
- New model: U(1)_R x U(1)_{B-L} with inverse seesaw (by L. Reichert, M. Hirsch)
CalcHep:
- Writing electric charge of all particles to AUX column (thanks to Marco Pruna)
Output for LHPC spectrum plotter (https://github.com/benoleary/LesHouchesParserClasses_CPP)
- Output of control file which is compatibel to the SLHA spectrum files written by SPheno for the corresponding model