2018/12/31 by Stephen P. Martin · 1 citation
Physics and Astronomy · #hep-ph
paper · pdf · doi:10.1103/physrevd.99.033007
published as Phys. Rev. D 99, 033007 (2019) · 28 pages. v2: references added. v3: minor cosmetic notational change
arxiv created 2019/01/25 · arxiv updated 2019/02/20
I discuss the matching relations for the running renormalizable parameters when the heavy particles (top quark, Higgs scalar, Z and W vector bosons) are simultaneously decoupled from the Standard Model. The complete two-loop order matching for the electromagnetic coupling and all light fermion masses are obtained, augmenting existing results at 4-loop order in pure QCD and complete two-loop order for the strong coupling. I also review the further sequential decouplings of the lighter fermions (bottom quark, tau lepton, and charm quark) from the low-energy effective theory.