High Energy and Soft-Collinear Resummation in QCD for Jet Production at Hadron Colliders

In this thesis a detailed discussion of resummation in QCD for high energy perturbative effects (with High Energy Jets or HEJ) and in the soft-collinear regime (with the Pythia parton shower) for processes involving the production of jets at hadron collider experiments. We develop and validate a sophisticated novel prescription (HEJ+Pythia) for merging high energy with soft-collinear resummation, which preserves the logarithmic accuracy of each resummation. Predictions produced by merging the resummation schemes in this way are compared to experimental data for inclusive pp → jj production at the Large Hadron Collider (LHC). Future experimental analyses to disentangle high-energy and soft-collinear effects are suggested. We also extend the HEJ framework and present significant developments in the description of Higgs production, particularly in describing inclusive pp → H + 1j production at hadron colliders, and compare predictions within this framework to LHC data. This presents the first leading-logarithmically accurate HEJ-resummed prediction for an inclusive single-jet process, and represents a significant development in precision descriptions of strong physics in the Higgs sector at large energies

All Order Merging of High Energy and Soft Collinear Resummation

We present a method of merging the exclusive LO-matched high energy resummation of High Energy Jets (HEJ) with the parton shower of Pythia which preserves the accuracy of the LO cross sections and the logarithmic accuracy of both resummation schemes across all of phase space. Predictions produced with this merging prescription are presented with comparisons to data from experimental studies and suggestions are made for further observables and experimental cuts which highlight the importance of both high energy and soft-collinear effects.Comment: Proceedings of 51st International Symposium on Multiparticle Dynamics (ISMD2022

A Framework for Arabic Concept-Level Sentiment Analysis using SenticNet

Arabic Sentiment analysis research field has been progressing in a slow pace compared to English and other languages. In addition to that most of the contributions are based on using supervised machine learning algorithms while comparing the performance of different classifiers with different selected stylistic and syntactic features. In this paper, we presented a novel framework for using the Concept-level sentiment analysis approach which classifies text based on their semantics rather than syntactic features. Moreover, we provided a lexicon dataset of around 69 k unique concepts that covers multi-domain reviews collected from the internet. We also tested the lexicon on a test sample from the dataset it was collected from and obtained an accuracy of 70%. The lexicon has been made publicly available for scientific purposes

HEJ 2.2: W boson pairs and Higgs boson plus jet production at high energies

We present version 2.2 of the High Energy Jets (HEJ) Monte Carlo event generator for hadronic scattering processes at high energies. The new version adds support for two further processes of central phenomenological interest, namely the production of a W boson pair with equal charge together with two or more jets and the production of a Higgs boson with at least one jet. Furthermore, a new prediction for charged lepton pair production with high jet multiplicities is provided in the high-energy limit. The accuracy of HEJ 2.2 can be increased further through an enhanced interface to standard predictions based on conventional perturbation theory. We describe all improvements and provide extensive usage examples. HEJ 2.2 can be obtained from https://hej.hepforge.org.Comment: 29 pages, 2 figures and many code listing

High energy resummed predictions for the production of a Higgs boson with at least one jet

We present all-order predictions for Higgs boson production plus at least one jet which are accurate to leading logarithm in s^/|p⊥|2. Our calculation includes full top and bottom quark mass dependence at all orders in the logarithmic part, and to highest available order in the tree-level matching. The calculation is implemented in the framework of High Energy Jets (HEJ). This is the first cross section calculated with log(s^) resummation and matched to fixed order for a process requiring just one jet, and our results also extend the region of resummation for processes with two jets or more. This is possible because the resummation is performed explicitly in phase space. We compare the results of our new calculation to LHC data and to next-to-leading order predictions and find a numerically significant impact of the logarithmic corrections in the shape of key distributions, which remains after normalisation of the cross section

Investigation on CFRP as dual-functional material in chloride-contaminated solutions

This paper investigates the performance of carbon fibre reinforced polymer (CFRP) as a dual function material in combined impressed current cathodic protection and structural strengthening of reinforced concrete structures. Tests in solution showed that CFRP maintain stable electrical conductivity after 80 d accelerated anodic polarization. Results suggest that oxygen evolution occurring at low chloride ion concentration ([Cl]) primarily damages the carbon fibre, while chlorine evolution occurring at high [Cl] primarily damages the epoxy resin. The tensile strength of CFRP after anodic polarization decreases with increasing circulated charge, and, for a given circulated charge, it increases with increasing [Cl]