Minijet transverse energy production in the next-to-leading order in hadron and nuclear collisions
A. V. Leonidov, D. M. Ostrovsky
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 (NLO) order in QCD at RHIC and LHC energies. The NLO transverse energy production in pp collisions cross sections are larger than the LO ones by the factors of KRHIC ~ 1.9 and KLHC ~ 2.1 at RHIC and LHC energies correspondingly. These results were then used to calculate 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 Eperp distribution for the nuclear ones, while its form remains practically unchanged.
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