Survival probability in diffractive dijet photoproduction

TL;DR

This paper compares recent experimental data on diffractive dijet photoproduction with advanced QCD predictions to investigate if a less-than-one survival probability is supported, considering different factorization breaking scenarios.

Contribution

It provides the first detailed analysis of survival probability in diffractive dijet photoproduction using next-to-leading order QCD and recent H1 and ZEUS data.

Findings

Evidence supports survival probability less than one under factorization breaking assumptions.

Survival probability may depend on jet transverse energy (E_T^jet) or be independent, depending on the scenario.

Data suggests the necessity of incorporating factorization breaking effects in theoretical models.

Abstract

We confront the latest H1 and ZEUS data on diffractive dijet photoproduction with next-to-leading order QCD predictions in order to determine whether a rapidity gap survival probability of less than one is supported by the data. We find evidence for this hypothesis when assuming global factorization breaking for both the direct and resolved photon contributions, in which case the survival probability would have to be E_T^jet-dependent, and for the resolved or in addition the related direct initial-state singular contribution only, where it would be independent of E_T^jet.