Summing loops in QCD: Exclusive Higgs production and the survival probability

TL;DR

This paper derives a method to sum Pomeron loop diagrams in QCD, enabling accurate predictions of exclusive Higgs production cross sections by accounting for all relevant rescattering effects.

Contribution

It introduces a comprehensive approach to sum over Pomeron loops in QCD, addressing a longstanding theoretical challenge in diffractive processes.

Findings

Major contribution from non-interacting Pomerons in loop diagrams

Provides tools for summing all Pomeron loop diagrams in QCD

Enables precise estimation of survival probabilities in Higgs production

Abstract

The Pomeron loop amplitude and the amplitude for the diagram with any general number of loops is derived in the QCD dipole approach. It was found that the major contribution to the amplitude of an arbitrary Pomeron enhanced diagram, is equivalent to the diagram with non interacting Pomerons. This provides the necessary tools for solving the long standing theoretical problem of summing over Pomeron loop diagrams. In this theoretical framework the contribution of the full set of enhanced diagrams to the survival probability is estimated. This enables an accurate prediction for the exclusive cross section for diffractive Higgs production, which includes the suppression factor needed to screen out the full set of hard re-scattering corrections, in QCD.