Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-02-25
Phys.Rev. D63 (2001) 034004
Physics
High Energy Physics
High Energy Physics - Phenomenology
1+19 pages, 6 eps-figures, submitted to Physical Review D, text somewhat modified, results unchanged
Scientific paper
10.1103/PhysRevD.63.034004
When studying the production of minijets and transverse energy flow in high energy hadron-hadron or nucleus-nucleus collisions, two essential points have to be taken into account. First, one has to account for the virtuality of the colliding partons and secondly, it is important to avoid double counting, when many links in a parton chain can be interpreted as the momentum transfer in a hard subcollision. The Linked Dipole Chain model, introduced for low-x DIS, is particularly suitable for a study of these problems. It describes (mini)jet production in a kT-factorizing formalism, which includes all links in a parton chain on an equal footing, avoiding double counting. In a ``naive'' calculation based on integrated structure functions, the cross section blows up for small pT, which makes it necessary to introduce a soft cutoff. In our approach we find a dynamical suppression at low pT, which makes it possible to extrapolate to higher energies and make more reliable predictions for RHIC and LHC.
Gustafson Gösta
Miu Gabriela
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