Search found 4 matches
- 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...
- 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...
- 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...
- 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 ...