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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

Summary

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.

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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.

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.

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