Cette thèse se situe à mi-chemin entre la phénoménologie et la physique de particules expérimentale. Dans la première partie, nous décrivons un calcul de section efficace à order supérieur en développement perturbatif, ainsi que son implementation dans un générateur d'événements Monte Carlo. Nous présentons les corrections au premier order en chromodynamique quantique pour la production de boson de Higgs chargé en association avec un quark top au LHC, en utilisant le formalisme de soustraction de Catani et Seymour. Notre code indépendant nous a permis de valider les résultats donnés par MC@NLO, et nous avons réalisé des études concernant diverses contributions aux erreurs systématiques dues à la simulation d'événements. L'implémention du processus a été réalisée pour le générateur POWHEG. En raison de la quantité de données insuffisante disponible fin 2010 (le détecteur ATLAS a accumulé 35 pb-1 de données de collisions proton-proton), le processus de production de Higgs chargé n'a pas pu être étudié et nous nous sommes tournés vers la caractérisation de bruits de fonds. Dans ce contexte, il s'avère que la production de boson W en association avec un quark top est importante à connaître. Dans la seconde partie de cette thèse, nous mettons en place une analyse spécifique au canal Wt semileptonique, en incluant les effets statistiques et systématiques, pour lesquels nous nous concentrons plus particulièrement sur l'effet dû aux différentes paramétrisations du contenu des protons. Le processus Wt étant inobservable au Tévatron, nous pouvons pour la première fois donner une limite à la setion efficace de production. / This thesis is intended as a bridge between the two highly specialised domains of phenomenology and experimental particle physics. The first part describes in detail a higher order cross section calculation and implementation into a Monte Carlo event generator. We present the calculation of the next-to-leading order (NLO) quantum chromodynamic corrections for charged Higgs boson production in association with a top quark at the LHC, using the Catani-Seymour dipole subtraction method. Building an independent NLO code enabled us to cross-check the implemented version of MC@NLO, and a few studies have been made which focus on different contributions to the theoretical uncertainty attached to the NLO calculation. The actual implementation was performed for another NLO event generator, POWHEG. Considering the small production cross section of charged Higgs production associated with a top quark, an analysis of this channel using the 35 pb-1 of data collected with the ATLAS detector in 2010 from the proton-proton collisions of the LHC, makes no sense, and we switch to a very similar SM channel, namely Wt production. In the second part, we set-up a dedicated analysis for semileptonic Wt and focus on the evaluation of the PDF systematic uncertainty, following the PDF4LHC recommendation. The electroweak single top production cross section at the Tevatron is so low that it hasn't been observed until today, so we are able to set the world's first limit on its production cross section and include the most important systematic uncertainties in our analysis.

Définies aux milieux des années 1990, les distributions de partons généralisées (GPDs) représentent un degré d'information supérieur aux facteurs de formes et fonctions de distributions de partons: en effet elles conservent la corrélation entre fraction d'impulsion longitudinale et position transverse des partons dans le nucléon. Par conséquent les GPDs permettent d'accéder à la distributions des partons dans le plan transverse en fonction de leur impulsion longitudinale. De plus il est possible de calculer le moment orbital angulaire total des quarks par le biais de la règle de somme de Ji. Nous accédons expérimentalement aux GPDs par des observables liées à des processus exclusifs (asymmétries, sections efficaces,...). Un programme expérimental mondial a commencé au début des années 2000 afin de caractériser les GPDs. Ce document décrit l'analyse de données de deux expériences réalisées en 2004 et 2010 dans le Hall A au laboratoire Jefferson en Virginie. A partir des données de 2004, nous avons extrait les sections efficaces d'électroproduction de photon polarisées et non polarisées. Une étude approfondie des erreurs systématiques a significativement améliorée la qualité des résultats. Ces derniers semblent indiquer la nécessité de prendre en compte les corrections de cible massive et de transfert d'impulsion fini jusqu'au twist-4. A partir des données 2010, nous avons réalisé pour la première fois une séparation des réponses longitudinale et transverse de l'électroproduction de pions neutres. Les résultats ont confirmé l'hypothèse d'une contribution transverse significative bien qu'étant de twist supérieur par rapport à la contribution longitudinale. Ces données de haute précision, que ce soit pour le photon ou le pion neutre, valident le formalisme des GPDs et permettront d'affiner les modèles afin de réaliser la tomographie 3D du nucléon. / Defined in the mid 90's, the generelized parton distributions (GPDs) represent a higher level of information than the form factors and parton distribution fuctions: indeed they encapsulate the correlation between the fraction of longitudinal momentum and the transverse position of the partons inside the nucleon. Consequently we can access the distribution of the partons in the transverse plane according to their longitudinal momentum. Moreover we can derive the total angular orbital momentum of quarks thanks to Ji's sum rule. Experimentally, we access the GPDs through the study of deep exclusive processes (asymmetries, cross sections,...). A worldwide experimental program started in the early 2000's. This thesis presents two data analyses carried on two data sets from experiments running at Jefferson laboratory - Hall A in 2004 and 2010. From the 2004 data set, we have extracted unpolarized and polarized photon electroproduction cross sections. A careful study of the systematic errors has greatly improved the quality of the results. They seem to indicate the necessity to take into account target-mass and finite-t corrections up to twist-4. From the 2010 data set, we have performed the first separation of the longitudinal and transverse responses of neutral pion electroproduction. The results confirm the assumption of a significant contribution of the transverse response although kinematically suppressed with respect to the longitudinal response. These results of high precision validate the GPD approach and will allow to improve the existing models.

The purpose of this study was to contextualise the Swaziland correctional services environment and inmate population, analysing how best to respond to the needs of the organisation and providing strategies that can have an impact on crime and recidivism. Offenders in Swaziland are incarcerated because alternatives to imprisonment or the resources necessary to make a visible impact on the inmate population are not provided. There is also very little scientific information available on the profiles of inmates to determine who really needs to be incarcerated, who could be incarcerated for a shorter time and who could be taken care of in the community. In addition to the above, Swaziland correctional services finds itself in a predicament where it has to provide concrete evidence that it is effective and adding value to the social and economic reconstruction of the country. This implies the frequent assessment of the organisation's performance to ensure the continuous delivery of cost-effective, innovative and high quality correctional services. In an attempt to understand the breadth of the problems faced by Swaziland correctional services, this thesis sets out to assess the environment in which Swaziland correctional services operates and to suggest mechanisms which can be used to rehabilitate and reduce the inmate population in order to add value and sustain the delivery of an effective correctional service. This study would seem to be of value not only to correctional practitioners, but also to the police and judiciary in that they will have a better understanding of dilemmas faced by Swaziland correctional services. This will assist the police and judiciary to take more informed decisions with regard to effective law enforcement, detention of awaiting-trials and sentencing practices. With Swaziland and other African countries embarking on a new route in corrections, the academic world can also play a major role in enlightening reform in legislation, policies and practices. / Penology / D.Litt. et Phil. (Penology)

This report is the culmination of literature study and semi-structured interviews which assisted in developing a Model for Implementation of Restorative Justice in the South African Correctional System. The study explores the use of Restorative Justice as part of rehabilitation in a prison setting. Literature focuses mainly on Restorative Justice as part of diversion, in cases of first offenders and less serious offences. Restorative Justice with sentenced offenders has been gaining momentum, though. Diversity in terms of language, cultural and religious practice as well as social background, should be considered as it affects the decision to enter into a Restorative Justice process. Restorative Justice with sentenced offenders is challenging and in the main a largely unsupported field. The study draws on experience from other countries, while at the same time advocate for uniquely South African practice. The involvement of the most important role players, namely victim, offender and the community is emphasized. Attitude and insufficient training seem to be some of the challenges for the implementation of Restorative Justice. Successes are reported in the few sites where Restorative Justice is implemented in the Correctional System, but a change of mindset, of being open to possibilities other than lock-up and punish in the entire Criminal Justice System is needed. Restorative Justice in the Correctional System seems to have been approached as yet another new programme, and not as a paradigm shift for the entire Criminal Justice System. Dealing with conflict in a restorative way should be at the front end of the chain, with young children whose behaviour can be directed, as changing behaviour of adults proves to be difficult. Repentance and forgiveness in different cultures and spiritual backgrounds are some of the issues that are grappled with, although forgiveness is nowhere indicated as a requirement for a successful Restorative Justice process. Voluntary participation is required from victims and offenders with support from communities. It remains a deeply spiritual and individual journey for those who choose to turn away from anger, fear and hatred, and start the process of personal healing and restoration. Restorative Justice with sentenced offenders can assist in dealing with the aftermath of crime. / Penology / D. Litt. et Phil. (Penology)

The aim of this dissertation is to place the phenomenon of the overpopulation of South African prisons in perspective and to rectify the current situation in search of possible solutions. Since 1981, when this phenomenon reached unmanageable proportions, government has made numerous amnesties. This was only a short-term alleviation of the problem due to the high levels of recidivism. Correctional supervision as a sentence option was advocated by both the Lansdowne and Viljoen Commissions, enacted during 1986 and finally implemented during 1991. Initial expectations soon became blurred by factors such as insufficient development programmes and specialised personnel, enormous caseloads and the exclusion of supervision cases from development programmes. This study endeavours to analyse the current application of correctional supervision to determine the stumbling blocks and to create a foundation for new perspectives and possible solutions. / Penology / M.A. (Penology)

Successful outdoor camp programs are being threatened by decreased funding and increased focus on the control of juvenile delinquents. To determine the success of outdoor camp programs for the juvenile delinquent, it is important to examine the recidivism rates of those who go through the programs compared to those who do not. By properly infusing outdoor camp programs with resiliency education, new programs can be created with even more success. This paper is a literature review of the present state of research in both fields. With the background information presented here, the goal is to become a 'springboard' for further research.

Mentally ill juveniles who are incarcerated in correctional facilities receive minimal or no treatment services. The research in this thesis determines that mentally ill juvenile offenders receive inadequate treatment. It also determined that juvenile correctional officers as well as others in the criminal justice system are not trained properly to deal with mentally ill juveniles.

Le progrès technologique de nos sociétés est intimement lié aux matériaux. La physique de la matière condensée cherche à expliquer, décrire et prédire leurs propriétés à partir de lois fondamentales. Bien que l’on connaisse assez bien les axiomes qui régissent notre univers, la combinaison d’un grand nombre de petits systèmes compris individuellement mais interagissants ensemble mène à des propriétés émergentes qui peuvent être complexes et difficilement prévisibles. Dans cette thèse, nous étudions la supraconductivité non-conventionnelle dans les matériaux corrélés, un phénomène émergent des fortes interactions électroniques qui possède un immense potentiel technologique. Pour ce faire, nous réalisons des simulations numériques sur un matériau bien spécifique: le ruthénate de strontium. Dans un premier temps, nous discutons des états normaux des matériaux corrélés devenant supraconducteurs. Alors que la théorie des bandes permet de décrire le continuum entre un isolant électrique et un métal, elle n’arrive pas à décrire les phénomènes émergeant des interactions à plusieurs électrons. Nous expliquons comment la théorie de la fonctionnelle de la densité permet d’obtenir la densité du niveau fondamental d’un système interagissant en le transformant vers un problème non-interagissant effectif. Elle peut également être employée pour les systèmes possédant un important couplage spin-orbite. Cependant, les fonctionnelles disponibles n’arrivent pas à bien incorporer les fortes corrélations électroniques. Une manière de corriger ce manque est d’employer la théorie du champ moyen dynamique. Cette dernière permet de capturer la dépendance en temps des interactions locales à un corps. Toutefois, la supraconductivité impliquant des paires d’électrons, il faut plutôt étudier des objets à deux corps afin de la caractériser. Nous discutons des critères nécessaires à la provocation de transitions supraconductrices, exprimés en termes de corrections du vertex. Également, nous présentons les paramètres d’ordre pour caractériser une phase supraconductrice. La seconde partie se concentre sur la supraconductivité. D’abord, nous faisons un survol son historique, depuis sa découverte en 1911 jusqu’à celle de l’état supraconducteur du ruthénate de strontium. Ensuite, nous décrivons la supraconductivité conventionnelle, une classe particulière pour laquelle l’état ordonné est attribué à l’interaction entre les électrons et les vibrations du réseau cristallin. Puis, nous introduisons un autre mécanisme d’appariement: l’échange de fluctuations de spin et de charge. Finalement, nous présentons l’état des connaissances collectives modernes en ce qui a trait au ruthénate de strontium. Nos articles proposent de nouvelles avenues impliquant le couplage spin-orbite et les corrélations impaires en fréquences. Nous terminons en introduisant différentes perspectives de recherche dans le domaine de la supraconductivité. / The technological progress of our societies is intimately linked with materials. Condensed matter physics tries to explain, describe and predict their properties from fundamental laws. Although we are quite familiar with the axioms that govern our universe, the combination of a large number of small systems understood individually but interacting together leads to emerging properties that can be complex and difficult to predict. In this thesis, we study unconventional superconductivity in correlated materials, a phenomenon emerging from strong electronic interactions that has immense technological potential. To do this, we carry out numerical simulations on a very specific material: strontium ruthenate. First, we discuss the normal states of correlated materials becoming superconducting. While band theory can describe the continuum between an electrical insulator and a metal, it cannot describe the phenomena emerging from interactions with several electrons. We explain how density functional theory makes it possible to obtain the density of the fundamental level of an interacting system by mapping it into an effective non-interacting problem. It can also be used for systems with a large spin-orbit coupling. However, the available functionals do not manage to incorporate strong electronic correlations well. One way to correct this deficiency is to employ dynamical mean field theory. The latter makes it possible to capture the time dependence of interactions at the one body level. However, since superconductivity involves pairs of electrons, it is rather necessary to study two body objects in order to characterize it. We discuss the criteria necessary for inducing superconducting transitions, expressed in terms of vertex corrections. Also, we present the order parameters to characterize a superconducting phase. The second part focuses on superconductivity. First, we review its history, from its discovery in 1911 to that of the superconducting state of strontium ruthenate. Next, we describe conventional superconductivity, a particular class for which the ordered state is attributed to the interaction between electrons and the vibrations of the crystal lattice. Then, we introduce another pairing mechanism: the exchange of spin and charge fluctuations. Finally, we present the state of modern collective knowledge about strontium ruthenate. Our articles propose new avenues involving spin-orbit coupling and odd frequency correlations. We end by introducing different research perspectives in the field of superconductivity.

The purpose of this case history was to view the development of the Saskatchewan Adult Attendance Centre Project through the perspective of currently accepted, but selected, adult education philosophy, principles, and techniques. The Project was a mandatory adult education component of Probation Services, a program for adult offenders operated by Saskatchewan Corrections. The story of the evolution from 1979 to 1984 of the two Adult Attendance Centres of the Project, based in the cities of Regina and Saskatoon, was presented in the context of an historical overview of the education of adults in the Corrections systems of Britain, the United States, and Canada. The Attendance Centres were not set up as adult education institutions. They were intended to be cost effective alternatives to incarceration. The study maintained that sentencing that included attendance at the Centres was more cost effective for the provincial government than incarceration or traditional probation. It argued that the kind of education presented to adult probationers in the Centre programs often strayed from currently accepted adult education philosophy, principles, and techniques. None the less, significant potential existed in the Centres for the creation of more meaningful adult education opportunities for persons on probation.

The purpose of this case history was to view the development of the Saskatchewan Adult Attendance Centre Project through the perspective of currently accepted, but selected, adult education philosophy, principles, and techniques. The Project was a mandatory adult education component of Probation Services, a program for adult offenders operated by Saskatchewan Corrections. The story of the evolution from 1979 to 1984 of the two Adult Attendance Centres of the Project, based in the cities of Regina and Saskatoon, was presented in the context of an historical overview of the education of adults in the Corrections systems of Britain, the United States, and Canada. The Attendance Centres were not set up as adult education institutions. They were intended to be cost effective alternatives to incarceration. The study maintained that sentencing that included attendance at the Centres was more cost effective for the provincial government than incarceration or traditional probation. It argued that the kind of education presented to adult probationers in the Centre programs often strayed from currently accepted adult education philosophy, principles, and techniques. None the less, significant potential existed in the Centres for the creation of more meaningful adult education opportunities for persons on probation.