Decay of Color Gauge Fields in Heavy Ion Collisions and Nielsen-Olesen Instability

Details Decay of Color Gauge Fields in Heavy Ion Collisions and Nielsen-Olesen Instability Decay of Color Gauge Fields in Heavy Ion Collisions and Nielsen-Olesen Instability

2008-03-03

arxiv.org/abs/0803.0188v3

Prog.Theor.Phys.121:809-822,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

14pages, 5figures

Scientific paper

10.1143/PTP.121.809

We analyze the behavior of unstable modes in the glasma produced in high energy heavy ion collisions, using a simple model with effective homogeneous longitudinal color electric and magnetic fields. The unstable modes are approximately described as Nielsen-Olesen unstable modes under the homogeneous longitudinal gauge fields. We find that the Nielsen-Olesen unstable modes show properties very similar to those of the exponentially increasing unstable modes in the glasma recently shown by Romatschke and Venugopalan. Although initial gauge fields in the glasma are much stronger than the ones in our model, they decay with the production of the Nielsen-Olesen unstable modes. We discuss why we can reproduce the features of the glasma by using the effective homogeneous weak magnetic fields. Our analysis supports an idea that the decay of the gauge fields in the glasma is caused by Nielsen-Olesen instability.

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