QCD flavour-blindness on the lattice and in the real world
- Event time: 2:00pm
- Event date: 16th November 2011
- Speaker: Paul Rakow (University of Liverpool)
- Location: Lecture Theatre C, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
The QCD interaction is flavour-blind. Neglecting electromagnetic and weak interactions, the only difference between flavours is caused by the different quark masses. We explain how flavour-blindness constrains hadron masses and matrix elements after flavour SU(3) is broken by the mass difference between the strange and light quarks. We use this knowledge to help us extrapolate 2+1 flavour lattice data to the physical point. Flavour blindness is particularly useful if we approach the physical point along a path with the sum of the quark masses held constant.
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..