Nonperturbative computation of gluon minijet production in nuclear collisions at very high-energies

Sep, 1998
49 pages
Published in:
  • Nucl.Phys.B 557 (1999) 237
e-Print:
Report number:
  • NBI-98-21,
  • UALG-TP-98-6

Citations per year

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Abstract:
At very high energies, in the infinite momentum frame and in light cone gauge, a hard scale proportional to the high parton density arises in QCD. In an effective theory of QCD at small xx, this scale is of order αSμ\alpha_S\mu, where μ\mu is simply related to the gluon density at higher rapidities. The ab initio real time evolution of small xx modes in a nuclear collision can be described consistently in the classical effective theory and various features of interest can be studied non-perturbatively. In this paper, we discuss results from a real time lattice computation of the production of gluon jets at very high energies. At very large transverse momenta, ktμk_t\geq \mu, our results match the predictions from pQCD based mini-jet calculations. Novel non-perturbative behaviour of the small xx modes is seen at smaller momenta ktαSμk_t\sim \alpha_S\mu. Gauge invariant energy-energy correlators are used to estimate energy distributions evolving in proper time.
Note:
  • 50 pages Latex, includes 7 figures, revised version, Nuclear Physics B, in press Report-no: NBI-98-21, UALG/TP/98-6
  • Quark-gluon plasma
  • Perturbative QCD jets
  • Heavy-ion collisions
  • nucleus nucleus: nuclear reaction
  • jet: minijet
  • gluon: jet
  • nonperturbative
  • quantum chromodynamics
  • lattice field theory: effective action
  • gluon: radiation