26-30 November 2018
Europe/Vienna timezone

The dispersion method and dimensional regularization applied to the decay H → Z + γ

29 Nov 2018, 16:30


Austrian Academy of Sciences, Dr.-Ignaz-Seipel-Platz 2, 1010 Vienna, AUSTRIA
Non-Invited Talk [6] Supersymmetry Discrete symmetries and models of flavour mixing


Helmut Eberl (HEPHY Vienna)


We have calculated the W-loop contribution to the amplitude of the decay H → Z + γ in the Rξ gauge using dimensional regularization (DimReg) and in the unitary gauge through the dispersion with DimReg and the dispersion method, adopting the boundary condition at the limit MW → 0 defined by the Goldstone boson equivalence theorem (GBET), completely coincide. This implies that DimReg is compatible with the dispersion method obeying the GBET. The advantage of the applied dispersion method is that we work with finite quantities and no regularization is required.

Content of the contribution Theory

Primary authors

Helmut Eberl (HEPHY Vienna) Ekaterina Christova (Bulgarian Academy of Sciences (BG)) Dr Iavor Boradijiev (Institute of Solid State Physics, BAS, Sofia, Bulgaria)

Presentation Materials

Peer reviewing