Three-particle correlations in QCD jets and beyond

TL;DR

This paper provides detailed theoretical predictions for three-particle correlations in quark and gluon jets using advanced resummation techniques, testing local parton hadron duality and making LHC predictions.

Contribution

It extends previous work by including predictions beyond the limiting spectrum and near the hump of the distribution, using analytical solutions in different approximation schemes.

Findings

Analytical solutions for three-particle correlations in QCD jets.

Predictions tested against local parton hadron duality.

LHC predictions for multi-particle correlations.

Abstract

In this paper, we present a more detailed version of our previous work for three-particle correlations in quark and gluon jets [1]. We give theoretical results for this observable in the double logarithmic approximation and the modified leading logarithmic approximation. In both resummation schemes, we use the formalism of the generating functional and solve the evolution equations analytically from the steepest descent evaluation of the one-particle distribution. In addition, in this paper we include predictions beyond the limiting spectrum approximation and study this observable near the hump of the single inclusive distribution. We thus provide a further test of the local parton hadron duality (LPHD) and make predictions for the LHC. The computation of higher rank correlators is presented in the double logarithmic approximation and shown to be rather cumbersome.