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Related Experiment Videos

Initial gluon multiplicity in heavy-ion collisions.

A Krasnitz1, R Venugopalan

  • 1UCEH, Universidade do Algarve, Campus de Gambelas, P-8000 Faro, Portugal.

Physical Review Letters
|April 6, 2001
PubMed
Summary
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Researchers calculated the initial gluon multiplicity in high-energy nuclear collisions using SU(2) and SU(3) gauge theories. This provides predictions for the Relativistic Heavy Ion Collider and Large Hadron Collider experiments.

Area of Science:

  • High Energy Physics
  • Quantum Chromodynamics
  • Nuclear Collisions

Background:

  • The initial gluon multiplicity is crucial for understanding high-energy nuclear collisions.
  • Previous models lacked precise predictions for gluon density and momentum distributions.

Purpose of the Study:

  • To compute the initial gluon multiplicity per unit area per unit rapidity.
  • To extrapolate these calculations from SU(2) to SU(3) gauge theory.
  • To predict distributions relevant to RHIC and LHC.

Main Methods:

  • Calculations based on SU(2) gauge theory for a range of g(2)mu L.
  • Extrapolation of results to SU(3) gauge theory.
  • Computation of the initial gluon transverse momentum distribution.

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Main Results:

  • The function f(N)(g(2)mu L) was computed as 0.14 +/- 0.01 for SU(2).
  • Predictions for dN/L2/d eta were made for RHIC and LHC relevant g(2)mu L values.
  • The initial gluon transverse momentum distribution was found to be well-behaved at low transverse momentum.

Conclusions:

  • The study provides a robust method for predicting initial gluon multiplicity in nuclear collisions.
  • The results offer valuable input for theoretical models and experimental analyses at.