Limits on new gauge vector forces and associated mass giving scalars for Z decay

The new paper at ArXiv https://www.arxiv.org/abs/2501.04388 by Peli and Trocsanyi linit show how Higgs Bosons decay measurements can limit new Bosons. The current measurement of Z width is not yet strong enough to limit all new models.

  The SM theoretical prediction for the Higgs boson width is ΓSM
h = 4.07 MeV, with
a relative uncertainty of 4% [3]. The experimental measurements on the other hand are
ΓATLAS
h = 4.5+3.3
−2.5 MeV [17] and ΓCMS
h = 3.2+2.4
−1.7 MeV [18], display a much larger uncertainty
than the SM theoretical prediction allowing for several BSM models to remain compatible
with observations.