Hard Colour Singlet Exchange at the Tevatron

TL;DR

This paper investigates the hard colour singlet exchange process at the Tevatron, comparing experimental data with BFKL pomeron predictions, and finds agreement when using a constant alpha_s consistent with HERA measurements.

Contribution

It provides a detailed phenomenological analysis of colour singlet exchange, incorporating multiple interactions and validating BFKL pomeron models with experimental data.

Findings

Agreement between data and BFKL predictions with constant alpha_s

Alpha_s value aligns with HERA measurements

Inclusion of multiple interactions affects gap survival predictions

Abstract

We have performed a detailed phenomenological investigation of the hard colour singlet exchange process which is observed at the Tevatron in events which have a large rapidity gap between outgoing jets. We include the effects of multiple interactions to obtain a prediction for the gap survival factor. Comparing the data on the fraction of gap events with the prediction from BFKL pomeron exchange we find agreement provided that a constant value of alpha_s is used in the BFKL calculation. Moreover, the value of alpha_s is in line with that extracted from measurements made at HERA.