Corrections to Angular Ordering in Multiple Hadroprodroproduction

Details Corrections to Angular Ordering in Multiple Hadroprodroproduction Corrections to Angular Ordering in Multiple Hadroprodroproduction

1995-09-18

arxiv.org/abs/hep-ph/9509326v2

Z.Phys.C72:271-280,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex file

Scientific paper

10.1007/s002880050245

One of the key ideas in describing the multiparticle production at high energies in the perturbative QCD is the angular ordering in successive soft-gluon emission. We analyse the angular distribution of particles in a jet, and investigate the corrections to the angular ordering. At a small angle from the jet direction, the angular ordering is exact at the next-to-leading order. At a large angle, the angular ordering overestimates the angular particle density by a factor $(1-\gamma\ln \cos^2(\theta/2))$, where $\gamma$ is the anomalous dimension of the multiplicity. The $O(\gamma)$ correction restores the boost invariance of the cross section.

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