Anomalous Higgs Yukawa couplings
Department of Physics and Astronomy, University of California - Riverside, CA 92521, USA
Received: 26 August 2014
Accepted: 23 September 2014
In the standard model, the Higgs boson h couples to the quarks and charged leptons according to the well-known formula , where or lepton and is its vacuum expectation value. Suppose is of radiative origin instead, then the effective Yukawa coupling will not be exactly . We show for the first time quantitatively how this may shift the observed branching fractions of and upward or downward. Thus, the precision measurements of the Higgs decay to fermions at the Large Hadron Collider, due to the resume operation in 2015, could be the key to possible new physics.
PACS: 14.80.Ec – Other neutral Higgs bosons / 12.15.Ff – Quark and lepton masses and mixing / 12.60.-i – Models beyond the standard model
© EPLA, 2014