Initial Gluon Multiplicity in Heavy-Ion Collisions
The initial gluon multiplicity per unit area per unit rapidity, dN/L{sup 2}/d{eta} , in high energy nuclear collisions, is equal to f{sub N}(g{sup 2}{mu}L) (g{sup 2}{mu}){sup 2}/g{sup 2 } , with {mu}{sup 2} proportional to the gluon density per unit area of the colliding nuclei. For an SU(2) gauge theory, we compute f{sub N}(g{sup 2}{mu}L)=0.14{+-} 0.01 for a wide range in g{sup 2}{mu}L . Extrapolating to SU(3), we predict dN/L{sup 2}/d{eta} for values of g{sup 2}{mu}L relevant to the Relativistic Heavy Ion Collider and the Large Hadron Collider. We compute the initial gluon transverse momentum distribution, dN/L{sup 2}/d{sup 2}k{sub {perpendicular}} , and show it to be well behaved at low k{sub {perpendicular}} .
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205840
- Journal Information:
- Physical Review Letters, Vol. 86, Issue 9; Other Information: DOI: 10.1103/PhysRevLett.86.1717; Othernumber: PRLTAO000086000009001717000001; 005108PRL; PBD: 26 Feb 2001; ISSN 0031-9007
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
Similar Records
Excess free energy and Casimir forces in systems with long-range interactions of van der Waals type: General considerations and exact spherical-model results
A quark-gluon plasma search in anti p --p at radical s = 1. 8 TeV