EPJ

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EPJ C - Particles and Fields
Particles and Fields
Eur. Phys. J. C 11, 495-499
DOI 10.1007/s100529900127

Minijet transverse-energy production in the next-to-leading order in hadron and nuclear collisions

A. Leonidov - D. Ostrovsky

P.N. Lebedev Physics Institute, Leninsky pr. 53, 117924 Moscow, Russia

Received: 11 May 1999 / Published online: 22 October 1999

Abstract
The transverse-energy flow generated by minijets in hadron and nuclear collisions into a given rapidity window in the central region is calculated in the next-to-leading-order (NLO) in QCD at RHIC and LHC energies. The NLO transverse-energy production in pp collision cross sections is larger than that in the leading-order (LO) ones by the factors of $K_{\rm RHIC} \sim 1.9$and $K_{\rm LHC} \sim 2.1$ at RHIC and LHC energies, respectively. These results were then used to calculate the transverse-energy spectrum in nuclear collisions in a Glauber geometrical model. We show that accounting for NLO corrections in the elementary pp collisions leads to a substantial broadening of the $E_{\perp}$distribution for the nuclear ones, while its form remains practically unchanged.

Copyright Springer-Verlag

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