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Effective Flavor‐changing Weak Neutral Current in the Standard Theory and Z‐Boson Decay
Author(s) -
Mann G.,
Riemann T.
Publication year - 1983
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19834950604
Subject(s) - physics , fermion , particle physics , branching fraction , vertex (graph theory) , boson , radiative transfer , neutral current , standard model (mathematical formulation) , theoretical physics , quantum mechanics , graph , neutrino , mathematics , archaeology , gauge (firearms) , history , discrete mathematics
We have studied the effective Z f 1 f 2 ‐vertex in the Glashow‐Salam‐Weinberg theory arising from 1‐loop corrections, allowing for arbitrary fermion masses m i in the loop. We use our results to study the branching ratio of the Z ‐boson decay into two different fermions. This is of phenomenological interest if there exist yet unknown fermions with large mass which could show up at present and designed accelerators only through radiative corrections.