3-8 July 2016
The University of Melbourne
Australia/Melbourne timezone

A Sequential Heavy Quark Doublet Q and a Light Dilaton D

7 Jul 2016, 17:10
20m
Yasuko Hiraoka Myer Room ()

Yasuko Hiraoka Myer Room

Talk Higgs Physics Higgs Physics

Speakers

Prof. George Wei-Shu Hou (National Taiwan University) George Wei-Shu Hou (National Taiwan University (TW))

Description

There is a cry in the wilderness: "Repent! The Higgs boson may be fictitious." (Phil Anderson, Nature Physics 2/2015). A light "Higgs" mode appears in a specially prepared superconductor material, where "amplitude modes" are much higher at twice the energy/mass gap. With the 125 GeV boson well established, could it be dynamical rather than elementary, and not in the Standard Model Lagrangian? We recount the possibility that an extra sequential quark Q with Yukawa coupling lambdaQ > 4pi could be the source of dynamical electroweak symmetry breaking, while the 125 GeV boson is a dilaton from spontaneous violation of scale invariance. To exclude the latter, one should make date-based measurements of both the vector-boson fusion and gluon-gluon fusion plus two-jet processes at the LHC, which can be achieved with Run 2 data. With such strong Yukawa coupling, the numerical solution of a "gap equation" is shielded from UV completion, though the actual UV should not be too far beyond, and likely related to the fundamental theory of Yukawa couplings. The 2mQ scale may be out of reach for the LHC, but QQ(bar) boundstates could be accessible, while supporting Bd -> mu+mu- and KL -> pi0 nu nu(bar) rare decays could emerge during the LHC Run2 period.

Primary author

Prof. George Wei-Shu Hou (National Taiwan University)

Presentation Materials