Journal article

Publication year: 1997

Pages: 3138-3141

Journal: Physical Review Letters

Volume number: 79

Issue number: 17

ISSN: 0031-9007

DOI Link: https://doi.org/10.1103/PhysRevLett.79.3138

Publisher: American Physical Society

Abstract: 
Utilizing the Langevin equation for the linear a model we investigate the interplay of friction and white noise on the evolution and stability of collective pionic fields in energetic heavy ion collisions. We find that the smaller the volume, the more stable transverse (pionic) fluctuations become on a homogeneous disoriented chiral field background (the average transverse mass [m(t)(2)] increases). other hand the variance of m(t)(2) increases even more, so for a system thermalized in an initial volume of 10 fm(3) about 96% and even in 1000 fm(3) about 60% of the individual trajectories enter into unstable regions (m(t)(2) < 0) for a while during a rapid one-dimensional expansion (tau(0) = 1 fm/c). In contrast the ensemble averaged solution in this case remains stable. This result supports the idea of looking for disoriented chiral condensate (DCC) formation in individual events. [S0031-9007(97)04270-1].

Harvard Citation style: Biro, T. and Greiner, C. (1997) Dissipation and fluctuation at the chiral phase transition, Physical Review Letters, 79(17), pp. 3138-3141. https://doi.org/10.1103/PhysRevLett.79.3138

APA Citation style: Biro, T., & Greiner, C. (1997). Dissipation and fluctuation at the chiral phase transition. Physical Review Letters. 79(17), 3138-3141. https://doi.org/10.1103/PhysRevLett.79.3138