Title: Adding flavors to strong interactions
Abstract: Quantum-Chromodynamics -- the field theory of strong interactions - is extremely successful in describing the physics of quarks and gluons. In a lattice simulation of QCD we can artificially increase the number of quarks' species -- quarks' flavours -- and study how fundamental issues like mass generation and symmetry breaking are related to the interplay of flavor symmetry and gauge dynamics. It turns out that when the number of flavors grows large, chiral symmetry is no longer spontaneously broken, the theory is infrared conformal and strongly interacting. After reviewing the theoretical predictions and possible phenomenological implications, the talk will focus on recent lattice results at zero and non-zero temperature, Evidence for the conformal phase and its anomalous dimension will be presented. It will be shown that this cold exotic phase is continuously connected to the physical strongly interactive quark gluon plasma, while its precursor effects might be used to study beyond-the-standard-model mechanisms of electroweak symmetry breaking.
HEP Apr26 flyer