Quantum evolution of disoriented chiral condensates

Journal Article · Tue Feb 28 23:00:00 EST 1995 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.51.2377· OSTI ID:6580107

Cooper, F; Kluger, Y; Mottola, E; Paz, J P ^[1]

---

1. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States) Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States) Department of Physics, Ciudad Universitaria, 1428 Buenos Aires (Argentina)

The nonequilibrium evolution of the hadronic plasma produced in a high energy heavy ion collision is studied in the O(4) linear [sigma] model to leading order in a large [ital N] expansion. Starting from an approximate equilibrium configuration at an initial proper time [tau] in the disordered phase we study the transition to the ordered broken symmetry phase as the system expands and cools. We give results for the proper time evolution of the effective pion mass, the order parameter [l angle][sigma][r angle] as well as for the pion two point correlation function. We study the phase space of initial conditions that lead to instabilities (exponentially growing long wavelength modes) which can lead to disoriented chiral condensates. We find that as a consequence of the strong self-coupling instabilities can exist for proper times that are at most 3 fm/[ital c] and lead to condensate regions that do not contain large number of particles.

• OSTI ID: 6580107
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 51:5; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

661300 -- Other Aspects of Physical Science-- (1992-)
662230* -- Quantum Chromodynamics-- (1992-)
663450 -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOSON-EXCHANGE MODELS
BOSONS
CHARGED-PARTICLE REACTIONS
CHIRAL SYMMETRY
CONDENSATES
CORRELATION FUNCTIONS
DYNAMICAL GROUPS
ELEMENTARY PARTICLES
FUNCTIONS
HADRONS
HEAVY ION REACTIONS
INSTABILITY
LIE GROUPS
MASS
MATHEMATICAL MODELS
MATHEMATICAL SPACE
MESONS
NON-EQUILIBRIUM PLASMA
NUCLEAR REACTIONS
O GROUPS
ORDER-DISORDER TRANSFORMATIONS
PARTICLE MODELS
PERIPHERAL MODELS
PHASE SPACE
PHASE TRANSFORMATIONS
PIONS
PLASMA
PSEUDOSCALAR MESONS
SIGMA MODEL
SPACE
SYMMETRY
SYMMETRY BREAKING
SYMMETRY GROUPS
TIME DEPENDENCE