#### Conformal vs confining scenario in SU(2) with adjoint fermions

- Event time: 2:00pm
- Event date: 28th September 2009
- Speaker: Agostino Patella (Swansea University)
- Location: Room 6206, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB

### Event details

SU(2) with two Dirac fermions in the adjoint representation is a candidate
as walking technicolor model for Electroweak Spontaneous Symmetry
breaking. Understanding whether this theory is confining or IR-conformal
is a very challenging problem, which can be addressed by means of
numerical simulations. I will present the most recent spectrum
measurements, both in the mesonic and gluonic sectors close to the chiral
limit. Even for light constituent fermions the lightest glueballs are
found to be lighter than the lightest mesons. I will discuss how this
observation can be interpreted as a hint of (quasi-)conformal physics, and
how the systematic errors still prevent us from drawing any solid
conclusion.

#### Event resources

The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..