Initial energy density of gluons produced in very-high-energy nuclear collisions

In very-high-energy nuclear collisions, the initial energy of produced gluons per unit area per unit rapidity, (dE/L2)/deta, is equal to f(g(2) L) (g(2) )(3)/g(2), where (2) is proportional to the gluon density per unit area of the colliding nuclei. For an SU(2) gauge theory, a nonperturbative compu...

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Veröffentlicht in:Physical review letters 2000-05, Vol.84 (19), p.4309-4312
Hauptverfasser: Krasnitz, A, Venugopalan, R
Format: Artikel
Sprache:eng
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Zusammenfassung:In very-high-energy nuclear collisions, the initial energy of produced gluons per unit area per unit rapidity, (dE/L2)/deta, is equal to f(g(2) L) (g(2) )(3)/g(2), where (2) is proportional to the gluon density per unit area of the colliding nuclei. For an SU(2) gauge theory, a nonperturbative computation of f(g(2) L) shows that it varies rapidly for small g(2) L but varies only by approximately 25%, from 0.208+/-0.004 to 0.257+/-0. 005, for a wide range 35.36- 296.98 in g(2) L. This includes the range relevant for collisions at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). Extrapolating to SU(3), we estimate dE/deta for Au-Au collisions in the central region at RHIC and LHC.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.84.4309