Pomeron intercepts at colliders

TL;DR

This paper introduces a method to compare experimental data with BFKL theoretical predictions for forward jet production, determining the effective Pomeron intercept at HERA and discussing implications for collider experiments like Tevatron and LHC.

Contribution

It presents a new method for direct comparison of data with BFKL predictions and determines the effective Pomeron intercept from HERA data, highlighting differences with Tevatron results.

Findings

Effective Pomeron intercept at HERA: 1.43 ± 0.025 (stat.) ± 0.025 (syst.)

Good fit of data with BFKL-LO parametrization at HERA

Proposes measuring dijet cross-section dependence on jet energies at LHC

Abstract

A method allowing for a direct comparison of data with theoretical predictions is proposed for forward jet production at HERA and Mueller-Navelet jets at Tevatron and LHC. An application to the determination of the effective Pomeron intercept in the BFKL-LO parametrization from d sigma/dx data at HERA leads to a good fit with a significantly higher effective intercept, $\alpha_P= 1.43 \pm 0.025 (stat.) \pm 0.025 (syst.),$ than for proton (total and diffractive) structure functions. It is however less than the value of the pomeron intercept using dijets with large rapidity intervals obtained at Tevatron. We also evaluate the rapidity veto contribution to the higher order BFKL corrections. We suggest to measure the dependence of the dijet cross-sections as a function of the jet transverse energies as a signal for BFKL pomeron at LHC.