Centre for Particle Theory Colloquia: Conformal symmetry and the standard model
15 December 2009 16:15 in CLC 203 (with coffee and biscuits in CM211 at 15:45 !)
It is a remarkable fact that the standard model (SM) of particle physics
is classically conformally invariant - except for a single term: the
scalar mass term, commonly introduced for electroweak symmetry breaking.
This work is based on the hypothesis that classically unbroken conformal
invariance, in conjunction with the Coleman-Weinberg mechanism and the
conformal anomaly, can explain the observed hierarchy of scales. I will
present evidence that such a scenario might be viable, provided (1) there
are no intermediate scales of any kind between the weak scale and the
Planck scale, and (2) the RG evolved couplings exhibit neither Landau
poles nor instabilities over this whole range of energies. I will also
comment on the issue of embedding such a scenario into a UV finte theory
of quantum gravity.
Coffee and biscuits at 15:30 in CM 211 (Maths Coffee Room).