Interjet Rapidity Gaps in Perturbative QCD

TL;DR

This paper develops a perturbative QCD formalism to analyze high-$p_T$ dijet rapidity gaps based on energy flow, enabling resummation of logarithms and matching experimental data features.

Contribution

It introduces a two-scale perturbative approach for dijet rapidity gaps, connecting energy flow with factorization theorems and color structure analysis.

Findings

Resummation of logarithms of $Q_{gap}/p_T$ matches Tevatron data features.

Formalism clarifies the color content of the hard scattering process.

Provides a theoretical framework for high-$p_T$ dijet gap analysis.

Abstract

We discuss a formalism in which high-$p_T$ dijet rapidity gaps are identified by energy flow in the interjet region. When the gap energy, $Q_{\rm gap}$, is sufficiently large, the cross section may be computed from standard factorization theorems. For $p_T\gg Q_T\gg\Lambda_{\rm QCD}$, this is a two-scale perturbative problem, in which we may resum logarithms of $Q_{\rm gap}/p_T$. The cross section computed as a function of $Q_{\rm gap}$ reproduces many of the features of the Tevatron dijet gap data. The factorized cross section gives meaning to the color content of the hard scattering.