Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-07-04
Physics
High Energy Physics
High Energy Physics - Phenomenology
27 pages, 17 figures; several minor insertions in the text; two references added
Scientific paper
The dynamics of symmetry-breaking after a quench is numerically simulated on a lattice for the (2+1)-dimensional O(3) model. In addition to the standard sigma-model with temperature-dependent Phi^4-potential the energy functional includes a four-derivative current-current coupling to stabilize the size of the emerging extended topological textures. The total winding number can be conserved by constraint. As a model for the chiral phase transition during the cooling phase after a hadronic collision this allows to investigate the interference of 'baryon-antibaryon' production with the developing disoriented aligned domains. The growth of angular correlations, condensate, average orientation is studied in dependence of texture size, quench rate, symmetry breaking. The classical dissipative dynamics determines the rate of energy emitted from the relaxing source for each component of the 3-vector field which provides a possible signature for domains of Disoriented Chiral Condensate. We find that the 'pions' are emitted in two distinct pulses; for sufficiently small lattice size the second one carries the DCC signal, but it is strongly suppressed as compared to simultaneous 'sigma'-meson emission. We compare the resulting anomalies in the distributions of DCC pions with probabilities derived within the commonly used coherent state formalism.
No associations
LandOfFree
DCC Dynamics in (2+1)D-O(3) model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with DCC Dynamics in (2+1)D-O(3) model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DCC Dynamics in (2+1)D-O(3) model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-410515