Search found 4 matches

by PhilipDiessner
2. May 2018, 17:36
Forum: SPheno, FlavorKit
Topic: Problems with one loop decays
Replies: 3
Views: 2350

Re: Problems with one loop decays

It seems like something is going wrong with the loop contributions as they are larger than the tree-level ones, but are not included because they are quite often negative. The top decay looks e.g. like this ------------------ Fu->Fd conj[VWm] ----------------------- 3 1 TREE x TREE: 0.28218357849087...
by PhilipDiessner
24. Apr 2018, 15:18
Forum: SPheno, FlavorKit
Topic: Problems with one loop decays
Replies: 3
Views: 2350

Problems with one loop decays

Hey Florian, I am having some rather strange issues with the one loop decay widths where some the channels seem not to appear for me. I attach my SPheno output for the MSSM default using freshly downloaded SARAH 4.12.3 and SPheno 4.0.3. Most notable are the decay of the top quark missing the main fi...
by PhilipDiessner
12. Feb 2018, 14:18
Forum: SPheno, FlavorKit
Topic: Sign of STU parameters
Replies: 1
Views: 1673

Sign of STU parameters

Dear Florian, do you have a reference for the STU formulas implemented in SPheno? If I compare the implementation to the formulas given in the PDG review 10. (Electroweak Model and Constraints on New Physics), Eq. 10.66, the implementation for T has the same sign, while the one for S and U has the o...
by PhilipDiessner
14. Jul 2017, 12:17
Forum: Bug reports
Topic: Bug in the B0 implementation in AddLoopFunctions.f90
Replies: 1
Views: 2391

Bug in the B0 implementation in AddLoopFunctions.f90

Hi Florian, The triviality check for the B0 function misses the condition for zero momentum: Complex(dp) Function SA_B0(xp, xm1, xm2) Implicit None Real(dp), Intent(in) :: xp, xm1, xm2 If ((xm1.eq.0._dp).and.(xm2.eq.0._dp)) Then SA_B0=0._dp Return End if ... This screws up the neutrino contribution ...