The sphaleron rate from 4D Euclidean lattices
Marc Barroso Mancha, Guy D. Moore
Abstract
A bstract We develop a new method to determine thermal activation rates, such as for bubble nucleation, topology change, etc., using 4-dimensional Euclidean methods. This allows nonperturbative study on the lattice. We then investigate the strong sphaleron rate in pure-glue QCD at temperatures between 1.3 T c and 1000 T c , making contact with previous results but extending them down close to the critical temperature. The extension to full QCD will be straightforward. Limitations of the proposal (the inability to compute a certain dynamical prefactor, puzzling large-volume behavior, and the inability to treat temperatures T < 1 . 3 T c ) are also discussed.
Topics & Concepts
SphaleronPhysicsEuclidean geometryNucleationQuantum chromodynamicsLattice (music)Lattice QCDThermalMathematical physicsThermodynamicsTopology (electrical circuits)Theoretical physicsParticle physicsPhase transitionGeometryCombinatoricsBaryogenesisAcousticsMathematicsHigh-Energy Particle Collisions ResearchParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle Interactions