Aspects of QCD at high energies and their Phenomenological Consequences
type: CreativeWork
description: We study the high-energy limit of QCD using the DGLAP, BFKL and B-JIMWLK frameworksbased on non-standard perturbative re-summation techniques to calculate the theory predictionsfor the cross section of semi-hard processes in these little explored kinematic domains.In particular, we have studied forward-backward dijet production initiated by hadronic or pho-tonic scattering, which is characterized by two alternative signatures: “jet-gap-jet” events, with theformation of a rapidity gap between the jets, or, inclusive dijets, with any radiation in the rapidityregion in between. To this end, we have, on the one hand, calculated new theoretical predictions us-ing the BFKL framework and, on the other hand, we have investigated these and other predictionsin dedicated phenomenological analyses (1; 2).We found that the BFKL factorization property of “jet-gap-jet” cross sections is violated athigher precision, requiring a rethinking of the physical picture currently used to describe this pro-cess. Nevertheless, we have shown that the violation is small at current energies. We have alsogiven a tentative explanation for the origin of the violation, and we have indicated a promising wayto reformulate the factorization properties of these processes.We have also proposed a new model (3) that takes into account the impact parameter distributionof the initial state nuclear structure — the transverse projection of nuclear matter centered at thecollision point — in shaping the forward-forward dijet distribution in dilute-dense regimes. Dilutefast moving partons are used to probe the small longitudinal momentum tail of the nuclear partonicdistribution, whose transverse motion can no longer be neglected and requires a description interms of transverse momentum distribution functions. At the same time, the large density of slow-moving partons in the nuclear cloud should be sensitive to gluon saturation effects, as dictated bythe B-JIMWLK evolution equations. We show that the process sign…
abstract: We study the high-energy limit of QCD using the DGLAP, BFKL and B-JIMWLK frameworksbased on non-standard perturbative re-summation techniques to calculate the theory predictionsfor the cross section of semi-hard processes in these little explored kinematic domains.In particular, we have studied forward-backward dijet production initiated by hadronic or pho-tonic scattering, which is characterized by two alternative signatures: “jet-gap-jet” events, with theformation of a rapidity gap between the jets, or, inclusive dijets, with any radiation in the rapidityregion in between. To this end, we have, on the one hand, calculated new theoretical predictions us-ing the BFKL framework and, on the other hand, we have investigated these and other predictionsin dedicated phenomenological analyses (1; 2).We found that the BFKL factorization property of “jet-gap-jet” cross sections is violated athigher precision, requiring a rethinking of the physical picture currently used to describe this pro-cess. Nevertheless, we have shown that the violation is small at current energies. We have alsogiven a tentative explanation for the origin of the violation, and we have indicated a promising wayto reformulate the factorization properties of these processes.We have also proposed a new model (3) that takes into account the impact parameter distributionof the initial state nuclear structure — the transverse projection of nuclear matter centered at thecollision point — in shaping the forward-forward dijet distribution in dilute-dense regimes. Dilutefast moving partons are used to probe the small longitudinal momentum tail of the nuclear partonicdistribution, whose transverse motion can no longer be neglected and requires a description interms of transverse momentum distribution functions. At the same time, the large density of slow-moving partons in the nuclear cloud should be sensitive to gluon saturation effects, as dictated bythe B-JIMWLK evolution equations. We show that the process sign…
author: Deganutti, Federico Maria
language: en
keywords: Physics, BFKL, high-energy, QCD
date published: 2024-01-01
date modified: 2026-07-24T02:46:29Z
provider: University of Kansas
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Kansas

PropertyValue
property ID: Handle
value: https://hdl.handle.net/1808/38567