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Dissertations / Theses on the topic 'Boston Association'

Author: Grafiati
Published: 25 July 2024
Last updated: 31 July 2025

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1

Watkin, Thomas. "Les sociétés de développement communautaire à Boston : ethnographie d’un territoire professionnel en construction." Paris, EHESS, 2014. http://www.theses.fr/2014EHES0069.

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En prenant le cas des sociétés de développement communautaire (CDCs) dans la ville de Boston aux Etats-Unis, cette thèse interroge la construction d'un territoire professionnel structuré dans l'espace social et physique qu'est la community. Ces organisations inscrites dans des quartiers populaires incarnent l'évolution des pratiques du développement communautaire et la professionnalisation d'un mouvement associatif engagé dans le domaine du logement et dans de multiples activités économiques et sociales. Pour cela, cette thèse entend identifier cet espace qu'est la community comme un réseau d'
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2

Xu, Chao. "Mesure du rapport des sections efficaces des bosons W et Z produits en association avec un jet dans les collisions proton-proton a √ s=7 TeV avec le detcteur ATLAS." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112091.

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Dans cette thèse la mesure du rapport des sections efficaces de production de bosons W et Z en association avec un jet au LHC est effectuée.Le rapport des sections efficaces est mesuré à l'aide des données issues de collisions proton-proton au LHC à une énergie dans le centre de masse de 7 TeV, recueillies par l'expérience ATLAS en 2010, correspondant à une luminosité intégrée d'environ 40 pb-1. L'analyse est effectuée à l’aide de bosons W et Z se désintégrant dans le canal muon.Il s'agit de la première mesure du rapport des taux de production de bosons W et Z associés à un jet réalisée à une
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3

Dumitriu, Ana Elena. "Study of the Higgs production in association with tt quarks." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0295/document.

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Le travail scientifique présenté dans cette thèse s’appuie sur des collisions proton proton, à 13 TeV dans le centre de masse, produite par le grand collisionneur de Hadron (LHC) et enregistrées entre 2015 et 2017 par le détecteur ATLAS. Après une brève introduction sur le programme de physique du LHC, le premier chapitre donne un aperçu complet du contexte et des motivations théorique. Ensuite une description complète du détecteur ATLAS et plus généralement de l’ensemble expérimental est donnée. Le troisième chapitre traite d’une des mesures des performances du calorimètre électromagnétique A
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4

Edwards, Valerie 1954. "The new role of labor unions as developers of responsive dependent care benefit programs : extending dependent care benefits to the independent contractor, freelancer and self-employed worker : a study of professional freelance musicians from Boston Musicians' Association Local 9-535." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/65668.

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5

Ruckert, Benjamin. "Search for a Higgs Boson Produced in Association with a W Boson at ATLAS." Diss., lmu, 2009. http://nbn-resolving.de/urn:nbn:de:bvb:19-108382.

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6

Le, Quilleuc Eloi. "Etude de la production de boson de Higgs en association avec une paire de quarks top-antitop dans l'expérience ATLAS." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS205/document.

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J'ai pris part à la recherche du boson de Higgs dans l'expérience ATLAS avec l'étude de l'état final comprenant une paire de quark top anti-top accompagnée d'un boson de Higgs, dit ttH. Je me suis spécialisé sur le canal boostés, dans lequel quarks top et boson de Higgs sont émis à haute énergie.La mesure de la section efficace du processus physique pp -&gt; ttH permet de tester la validité du Modèle Standard de la physique des particules, qui prédit le mécanisme d'interaction entre quark top et boson de Higgs<br>I took part in the Higgs boson search in the ATLAS experiment with the study of t
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7

Slaunwhite, Jason M. "Search for the Higgs Boson Produced in Association with a W Boson at CDF Run II." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1232121462.

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8

Fiascaris, Maria. "W Boson production in association with hadronic jets at ATLAS." Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543477.

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9

Sawyer, Craig Anthony. "Measurements of vector boson production in association with jets at the LHC using the ATLAS detector." Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:9c8f606b-4b66-4a42-a200-11cf81ea84f0.

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This thesis presents measurements of the cross section for the production of a <i>W</i> boson in association with jets and the ratio of the cross sections for the production of a <i>W</i> boson and a <i>Z</i> boson in association with jets. Both measurements are performed in proton-proton collisions at &radic;s = 7 TeV with the ATLAS experiment at the Large Hadron Collider using a dataset corresponding to an integrated luminosity of 4.6 fb<sup>-1</sup>. The dataset allows for the exploration of a large kinematic range, including jet production up to a transverse momentum of 1 TeV and multiplic
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10

Wright, Michael. "Higgs production in association with a Z boson at the LHC." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/5754/.

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The associated Z vector boson production rate of the Standard Model Higgs boson has been measured in decays into two b quarks, with the Z boson decaying into an electron or muon pair in the ATLAS detector at the Large Hadron Collider (LHC). The associated Z vector boson production cross section in the Standard Model is almost two orders of magnitude smaller than the dominant Higgs boson production cross section from gluon fusion. Proton-proton collision data at a centre-of-mass energy of 8 TeV delivered by the LHC with the ATLAS detector corresponding to an integrated luminosity of 13 fb−1 has
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11

Barnovska, Zuzana. "Diphoton measurements with the ATLAS detector at LHC : search for new resonances and study of diphoton production in association with jets." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAY072/document.

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Cette thèse étudie les collisions pp à sqrt{s} = 8 TeV avec des paires de photons dans l'état final, telles que recueillies par l'expérience ATLAS au LHC au cours de 2012. L'état final avec diphoton s'est avéré cruciale pour la découverte du boson de Higgs. La motivation pour la recherche de résonances supplémentaires se désintégrant en deux photons est très forte en raison l'existence de nombreux modèles prévoyant un secteur de Higgs étendu. Dans le même temps, des mesures détaillées des sections efficaces diphoton sont nécessaires pour établir la précision des prédictions théoriques actuelle
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12

Lopez, Solis Alvaro. "Contribution à la mesure d’énergie et du temps des électrons et des photons dans l’expérience ATLAS et recherche de la production de matière noire en association avec un boson de Higgs." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066372.

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La découverte d'une particule cohérent avec la production d'un boson de Higgs du Modèle Standard (MS) en 2012 par les collaborations ATLAS et CMS a ouverte de nouvelles possibilités de recherche de physique au-delà du MS (BSM). Les recherches de matière noire en ATLAS se concentrent sur des modèles générales, appelées mono-X, qui prédisent la production d'un seul objet X (jet, photon ou des bosons W ou Z) en association à des particules de matière noire (DM). La production de ces états finaux dépend du couplage entre les objets radiés et les particules en collision. Ce fait encourage la recher
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13

Rodina, Yulia. "Search for the Higgs boson decaying to a pair of bottom quarks and produced in association with a pair of top quarks in the LHC Run 2 data with the ATLAS detector using a likelihood technique." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/458630.

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14

Yang, Xuan. "Mesure de la production du boson de Higgs standard en association avec une paire de quarks top et antitop et recherche d'un boson de Higgs chargé se désintégrant en une paire de quarks top et bottom à l'aide du détecteur ATLAS au LHC." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALY015.

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Le champ Higgs joue un rôle important dans le modèle standard (SM). Il est non seulement responsable de la génération des particules élémentaires, mais aussi du seul champ scalaire du SM. L'étude du boson de Higgs est devenu l'un des sujets les plus populaires au LHC. Il fournit une excellente occasion de sonder les prédictions du SM et de rechercher des signes de nouvelle physique. La nouvelle physique au-delà du SM a généralement un scénario de Higgs plus compliqué et prévoit plus d'un boson de Higgs, et en particulier des bosons de Higgs chargés. La recherche de ces nouvelles particules nou
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15

Mercurio, Kevin. "A Search for the Higgs Boson Produced in Association With a Vector Boson Using the ATLAS Detector at the LHC." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:14226092.

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This dissertation presents two searches for the Standard Model Higgs boson produced in association with a vector boson and decaying via $H\to b\bar{b}$. Specifically, the processes are: \llbb\ alone, and again in combination with the \vvbb\ and \lvbb\ processes. The dataset used for the analysis consists of 4.7 fb$^{-1}$ at $\sqrt{s} = $7~TeV and 20.3 fb$^{-1}$at $\sqrt{s} = $8~TeV from LHC collisions. The search was optimized without bias to a particular mass of the Standard Model Higgs boson. Background processes contributing to the total number of observed events are estimated using a comb
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16

Leggat, Duncan. "Study of single top quarks in association with vector bosons." Thesis, Brunel University, 2015. http://bura.brunel.ac.uk/handle/2438/11557.

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17

Calvet, Thomas. "Search for the production of a Higgs boson in association with top quarks and decaying into a b-quark pair and b-jet identification with the ATLAS experiment at LHC." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0312/document.

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En Juillet 2012, les expériences ATLAS et CMS annoncent la découverte d'une nouvelle particule de masse 125 GeV, compatible avec le boson de Higgs prédit par le Modèle Standard. Pour établir la nature de ce boson de Higgs et la comparer au Modèle Standard, il est nécessaire de mesurer le complage du boson de Higgs au fermions. En particulier le quark top possède le plus fort couplage de Yukawa avec le boson de Higgs. Ce couplage est accessible par le processus de production d'un boson de Higgs en association avec une paire de quarks tops (ttH). Cette thèse présente la recherche d'évènement ttH
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18

Cruz-Martinez, Juan Manuel. "Next-to-next-to-leading order QCD corrections to Higgs boson production in association with two jets in vector boson fusion." Thesis, Durham University, 2018. http://etheses.dur.ac.uk/12806/.

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In this thesis the second-order QCD corrections to electroweak production of a Higgs boson in association with two jets through vector boson fusion are considered. This calculation is fully differential in the kinematics of the Higgs boson and of the final state jets. Infrared divergences are regulated using the antenna subtraction method. We detail the implementation of the process in the parton-level Monte Carlo integrator NNLOJET and present inclusive calculations as well as differential distributions for a wide range of observables at different center-of-mass energies.
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19

Wilson, Jonathan S. "A Search for the Standard Model Higgs Boson Produced in Association with Top Quarks." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1324333673.

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20

King, Robert Steven Beaufoy. "A first measurement of electroweak production of a W boson in association with two jets with the ATLAS detector." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:4d3ac65d-3f94-4847-806c-5c41a77d3a80.

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A first measurement of Electroweak W + 2 jets production at high dijet mass is performed using sqrt(s) = 7 TeV pp collision data from the Atlas experiment corresponding to 4.6 fb−1 of integrated luminosity. The background only hypothesis is excluded with a significance of 4.89-σ. A cross section of σ = 325 ± 6 (lumi) ±32 (stat) +63−70(syst) ±86 (theo) fb is extracted in the fiducial region.
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21

Proissl, Manuel Daniel. "Dijet invariant mass studies in the Higgs boson H→bb- resonance search in association with a W/Z boson using the ATLAS detector." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/10516.

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The Standard Model of Particle Physics describes the fundamental building blocks of matter and phenomena up to the highest particle interaction energies. The theory demands the existence of a scalar particle: the Higgs boson. The Higgs boson was discovered by the ATLAS and CMS collaborations at CERN using bosonic final states and is measured to have a mass of around 125 GeV. This particle is predicted to decay predominantly into pairs of b-quarks at this mass, but suffers from overwhelming backgrounds from the multijet production expected from QCD interactions. Therefore, H→bb- production in a
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22

Anger, Felix Richard [Verfasser], and Harald [Akademischer Betreuer] Ita. "NLO QCD corrections to vector boson production in association with multiple heavy and light jets." Freiburg : Universität, 2018. http://d-nb.info/1158495706/34.

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23

Coubez, Xavier. "Search for the standard Higgs boson produced in association with a pair of top quark in the multi-leptons channel in the CMS experiment." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAE049/document.

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La découverte en 2012 de la dernière particule élémentaire prédite par le Modèle Standard, le boson de Higgs, a ouvert une nouvelle ère en physique des particules. L’un des objectifs est désormais de sonder les couplages du boson de Higgs aux autres particules afin de confirmer la validité du modèle. Le travail de cette thèse a porté dans un premier temps sur l’identification de jets issus de quark b dès le système de déclenchement. L’objectif est de permettre de sélectionner un millier d’événements parmi les quarante millions produits chaque seconde au LHC en identifiant des objets présents d
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24

Al, Khoury Konie. "Measurements of the Higgs boson produced in association with a vector boson and decaying to a pair of b-quarks with the ATLAS detector." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASP006.

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La découverte du boson de Higgs en 2012 par les expériences ATLAS et CMS a ouvert tout un nouveau domaine de recherche au LHC: la mesure des propriétés de cette particule permet d’affiner notre compréhension du Modèle Standard et de contraindre la physique au-delà de ce Modèle. Cette thèse présente les mesures du boson de Higgs se désintégrant en une paire de quarks-b et produit avec un boson W ou Z, réalisées en utilisant 139fb⁻¹ de données de collisions proton-proton à une énergie de 13 TeV dans le centre de masse collectées par le détecteur ATLAS. Trois canaux sont défin
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25

Williams, Ciaran. "Hadronic productions of a Higgs boson in association with two jets at next-to-leading order." Thesis, Durham University, 2010. http://etheses.dur.ac.uk/414/.

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We present the calculation of hadronic production of a Higgs boson in association with two jets at next-to-leading order in perturbation theory. We consider amplitudes in an effective theory in which the Higgs couples to gluons in the limit of a large top quark mass. We treat the Higgs as the real part of the complex field φ that couples to the self-dual field strengths. We use modern on-shell inspired methods to calculate helicity amplitudes and we give a detailed review of unitarity based and on-shell methods. Using these unitarity methods we derive the cut-constructible pieces of the genera
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26

Smart, Ben Harry. "Search for the Standard Model Higgs boson produced in association with a vector boson and decaying to a b-quark pair with the ATLAS detector." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/14184.

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An important question at present in particle physics is whether the recently discovered boson with a mass of about 125 GeV is the Standard Model Higgs boson. A Standard Model Higgs boson with a mass of 125 GeV will predominantly decay to b-quark pairs. This work presents the author's contribution to the search with the ATLAS detector for a Standard Model Higgs boson produced in association with a W or Z boson and decaying to b-quark pairs. In order to search for the decay modes ZH → vvb¯b, WH → lvb¯b and ZH → l¯lb¯b, where l is either an electron or muon, events with zero, one or two electrons
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27

Kucher, Inna. "Search for the Higgs boson decaying to two photons and produced in association with a pair of top quarks in the CMS experiment." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS181/document.

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Dans cette thèse, la mesure des propriétés du boson de Higgs dans le canal de désintégration en deux photons avec l'expérience CMS au Grand Collisionneur de Hadrons (LHC) est présentée. L'objectif de ce travail est l’étude du mode de production associé à une paire de quark top (tṫH). Ce mode représente le seul accès direct au couplage de Yukawa du quark top, un paramètre fondamental du Modèle Standard. Le mode de production tṫH est un processus très rare. Il est de l'ordre de deux ordres de grandeur plus petits que la production principale du boson de Higgs par fusion de gluons. À 13 TeV, le m
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28

Flowers, Sean Christopher. "Search for the Standard Model Higgs boson produced in association with top quarks in the lepton plus jets channel." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu150043192139632.

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29

Ucchielli, Giulia. "Multivariate analysis methods in the search for the Higgs boson produced in association with top pairs at the ATLAS experiment at LHC." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7607/.

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The Large Hadron Collider, located at the CERN laboratories in Geneva, is the largest particle accelerator in the world. One of the main research fields at LHC is the study of the Higgs boson, the latest particle discovered at the ATLAS and CMS experiments. Due to the small production cross section for the Higgs boson, only a substantial statistics can offer the chance to study this particle properties. In order to perform these searches it is desirable to avoid the contamination of the signal signature by the number and variety of the background processes produced in pp collisions at LHC. M
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30

Allbrooke, Benedict Marc Miller. "Search for the Higgs Boson decaying to a b quark pair produced in association with a W Boson using missing transverse energy triggered events at ATLAS." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5681/.

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The WH → \(lv\)bb production and decay mode of the standard model Higgs Boson is searched for using the 2012 LHC proton-proton data recorded by the ATLAS detector at a centre-of-mass energy √s=8 TeV. Events containing W → μ\(v\) that fail muon triggers are recovered using a novel technique of recording these events with missing transverse energy based triggers. Two analyses are employed, one based on simple selection criteria to enhance the signal-to-background ratio and one that uses more complex multivariate techniques to separate signal from background. Both analyses exploit the different s
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31

Alio, Lion. "Search for the higgs boson produced in association with a Z boson and decaying to a pair of bottom quarks with the Atlas experiment at LHC." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4055/document.

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Recherche la Higgs boson produit en associe avec a Z boson et desintegre a paire de b-quarks. Cet etude est realise avec l'experience ATLAS aupres du LHC. Cet recherche contient le travail de l'identification de b-jets au detecteur d'ATLAS, l'etude de triggers de l'energie manquant et introduire un nouveau trigger qui permet de gagner plus de significance de signaux. La recherche de Higgs boson est poursuit avec l'implementation de nouveau trigger et faire d'analyse statistique pour estimer la significance gagne en comparaison avec l'analyse qui utilise triggers nominaux<br>Search for the Higg
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32

Wang, Qun. "Measurement of the differential cross section of Z boson production in association with jets at the LHC." Doctoral thesis, Universite Libre de Bruxelles, 2018. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/271719.

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This thesis presents the measurement of the differential cross section of Z boson pro-duction in association with jets (Z+jets) in proton-proton collision at the center-of-massenergy of 13 TeV. The data has been recorded with the CMS detector at the LHC duringthe year 2015, corresponding to an integrated luminosity of 2.19 fb −1 .A study of theCMS muon High Level Trigger (HLT) with the data collected in 2016 is also presented.The goal of analysis is to perform a first measurement at 13 TeV of the cross sections ofZ+jets as a function of the jet multiplicity, its dependence on the transverse mo
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33

Buzatu, Adrian. "Search for the standard model Higgs Boson produced in association with a W Boson in the isolated-track charged-lepton channel using the collider detector at Fermilab." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104593.

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The Higgs boson is the only elementary particle predicted by the Standard Model (SM) that has not yet been observed experimentally. If it exists, it explains the spontaneous electroweak symmetry breaking and the origin of mass for gauge bosons and fermions. We test the validity of the SM by performing a search for the associated production of a Higgs boson and a W boson in the channel where the Higgs boson decays to a bottom-antibottom quark pair and the W boson decays to a charged lepton and a neutrino (the WH channel). We study a dataset of proton-antiproton collisions at a centre-of-mass
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34

Leveque, Jessica. "Recherche d'un boson de Higgs leger produit en association avec une paire de quarks top dans l'experience ATLAS." Phd thesis, Université de la Méditerranée - Aix-Marseille II, 2003. http://tel.archives-ouvertes.fr/tel-00003738.

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L'un des principaux objectifs de l'experience ATLAS est la recherche de la derniere particule manquante du modele standard, le boson de Higgs, et l'etude de ses proprietes. Cette experience sera placee aupres du futur collisionneur de protons LHC, dont le demarrage est prevu pour l'annee 2007 au CERN. Les travaux presentes dans cette these sont dedies a la recherche d'un boson de Higgs de masse inferieure a 200 GeV/c2, dans le canal de production associee pp->ttH. L'identification des jets contenant des hadrons beaux est fondamentale pour l'etude du boson de Higgs et du quark top. Les performa
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35

Raine, John. "Evidence for the production of a Higgs boson in association with two top quarks with the ATLAS detector." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/evidence-for-the-production-of-a-higgs-boson-in-association-with-two-top-quarks-with-the-atlas-detector(8c0c9d01-ee21-4f7e-9db6-1f5d92de1faf).html.

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In this thesis, the search for the production of the Higgs boson in associationwith two top quarks is presented. The main focus of this work is on the analysis optimised for the decay of the Higgs boson to a b-quark pair. The analysis is performed using 36.1 fb−1 of ppcollision data at a centre of mass energy sqrt(s)=13 TeV collected by the ATLAS detector at the Large Hadron Collider during 2015 and 2016. The signal strength of ttH in relation to the Standard Model prediction for a Higgs boson with a mass of 125 GeV is measured to be mu(ttH) = 0.87 +0.64−0.61, with signal strengths great
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36

Chen, Xuan. "Hadronic production of a Higgs Boson in association with a jet at next-to-next-to-leading order." Thesis, Durham University, 2015. http://etheses.dur.ac.uk/11158/.

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In this thesis the production of a Higgs boson in association with a hadronic jet at the Large Hadron Collider is studied using the effective interaction between the Higgs boson to gluons induced by a heavy quark. The Leading Order (LO), Next- to-Leading Order (NLO) and Next-to-Next-to-Leading Order (NNLO) perturbative QCD corrections are studied for all of the parton channels. The infrared (IR) diver- gent behaviour of the various contributions to the partonic cross section is regulated using the antenna subtraction formalism. This method has previously been used at NNLO in the calculation of
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37

Levêque, Jessica. "Recherche d'un boson de Higgs léger produit en association avec une paire de quarks top dans l'expérience ATLAS." Aix-Marseille 2, 2003. http://www.theses.fr/2003AIX22024.

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38

Psoroulas, Serena [Verfasser]. "Measurement of jets production in association with a Z boson and in the search for the SM Higgs boson via H →ττ→ll+4ν with ATLAS / Serena Psoroulas". Bonn : Universitäts- und Landesbibliothek Bonn, 2013. http://d-nb.info/1045276391/34.

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39

Ravenscroft, Thomas Oliver. "Studies of possible improvements to the b-Jet energy resolution applied to the search for the Higgs boson produced in association with a W boson at the ATLAS detector." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6664/.

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This thesis presents a measurement of the cross-section for the produc- tion of a Higgs boson in association with a W boson. Where the Higgs boson decays to a pair of b-quarks and the W boson decays leptonically to a electron-neutrino pair or muon-neutrino pair. The measurements have been taken using 20 fb−1 of data collected at a centre-of-mass energy √s = 8 TeV from the ATLAS detector; one of the four main experiments at the Large Hadron Collider (LHC). An expected upper limit is calculated in the background-only hypothesis at 1.51 times the Standard Model expectation. The signal strength is
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40

Baca, Matthew. "Search for production of dark matter in association with a Higgs boson decaying to bb with the ATLAS detector." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8450/.

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Using 3.2 fb^-1 of sqrt(s) =13TeV proton-proton data collected in 2015 with the ATLAS detector at the Large Hadron Collider, new limits were imposed on the associated production of Dark Matter with a 125GeV Higgs boson which decays into a pair of b-quarks. The final state of the signal is a pair of b-quark jets and large Missing Transverse Momentum attributed to the DM escaping the detector. The dominant backgrounds were simulated. These were subject to selection requirements to increase signal to background ratio. Three regions were designated based on the number of leptons in the event. 0 le
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41

Delabat, Díaz Yasiel. "Search for Standard Model Higgs bosons produced in association with top-quark pairs in ttH multilepton final states using the ATLAS detector at the LHC." Doctoral thesis, Humboldt-Universität zu Berlin, 2021. http://dx.doi.org/10.18452/22550.

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Diese Arbeit beschreibt die Suche nach assoziierter Produktion eines Higgsbosons und eines Top-Quark Paares in Proton-Proton Kollisionen bei einer Schwerpunktsenergie von 13 TeV. Für diese Analyse wurden Ereignisse analysiert, die exakt zwei Leptonen mit gleichem Ladungsvorzeichen oder exakt drei Leptonen enthalten und daher auf die Higgs Zerfallsmoden in H->WW, H->ZZ und H->tautau sensitiv sind. Die Daten wurden mit dem ATLAS Detektor am Large Hadron Collider (LHC) in den Jahren 2015-17 aufgezeichnet. Der grösste Untergrund in beiden Kanälen stammt aus assoziierter Produktion von Vektorbosone
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42

Noguchi, Yohei. "Measurement of Higgs boson properties using the decay channel to b-quarks following associated production with a vector boson in pp collisions at √s=13 TeV." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263460.

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43

Heer, Sebastian [Verfasser]. "Top-quark pair production in association with a Z boson in the final state with four charged leptons / Sebastian Heer." Bonn : Universitäts- und Landesbibliothek Bonn, 2019. http://d-nb.info/1200019903/34.

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44

Kövesárki, Peter [Verfasser]. "Multivariate methods and the search for single top-quark production in association with a W boson in ATLAS / Peter Kövesárki." Bonn : Universitäts- und Landesbibliothek Bonn, 2013. http://d-nb.info/1044970855/34.

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45

Nechansky, Filip. "Search for the production of a Higgs boson decaying into a pair of bottom quarks in association with a pair of top quarks at 13 TeV with the ATLAS detector." Doctoral thesis, Humboldt-Universität zu Berlin, 2021. http://dx.doi.org/10.18452/23027.

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Die Entdeckung des Higgs-Bosons im Jahr 2012 bestätigt das Standardmodell als die erfolgreichste Theorie, die die grundlegenden Wechselwirkungen von Elementarteilchen beschreibt. Eine der wichtigen Eigenschaften des Higgs-Bosons ist seine Yukawa-Kopplung an das Top-Quark, die aufgrund der hohen Masse des Quarks im Standardmodell am stärksten ist. Diese Arbeit berichtet über eine Messung der Top-Yukawa-Kopplung mit Daten, die vom ATLAS-Detektor von 2015 bis 2018 bei einem Massenschwerpunkt von 13 TeV aufgezeichnet wurden. Die Kopplung wird in ttH(bb)-Ereignissen untersucht, einem Endzustand,
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46

Giorgi, Francesco Michelangelo. "Measurement of the Production Cross-Section of Single Top Quarks in Association with W Bosons at ATLAS." Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18060.

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Das Ziel der vorgelegten Arbeit ist die Messung des Wirkungsquerschnittes der elektroschwach vermittelten Produktion einzelner Top Quarks in Assoziation mit einem W-Boson. Dieser Prozess wird auch abkürzend als Wt-Kanal bezeichnet. Die Vermessung dieses Produktionskanals stellt einen Test der Standardmodell-Vorhersage dar und bietet gleichzeitig die Möglichkeit durch einen Vergleich mit anderen Produktionskanälen für einzelne Top Quarks (t- und s-Kanal) Rückschlüsse auf neue Physik jenseits des Standardmodells zu ziehen. Nach einer allgemeinen Einführung zur Physik des Top Quarks folgt eine B
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47

Smith, Geoffrey N. "A Search For the Standard Model Higgs Boson Produced in Association with Top Quarks in the Lepton + Jets Channel at CMS." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397747965.

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48

Vittori, Camilla <1990&gt. "Inclusive Z boson production and in association with b-jets in proton-proton collisions at 13 TeV with the ATLAS experiment." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8604/1/tesi.pdf.

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In this thesis, the measurement of the inclusive Z-boson production cross section at the centre of mass energy of √s =13 TeV is first presented. The data analysed were collected by ATLAS during early Run 2 of LHC and correspond to a luminosity of 81 pb−1. The cross section measurement is performed separately in the electron and muon decay channels and in their combination. The ratio with respect to the W cross section is also performed in the same fiducial phase space, and it benefits from cancellation of some experimental uncertainties. Results are compared to NNLO calculations in perturbativ
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49

Radloff, Peter. "Search for new light scalar bosons produced in association with a bottom-quark and decaying to two tau leptons." Thesis, University of Oregon, 2016. http://hdl.handle.net/1794/20536.

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A search for new neutral scalar bosons produced in association with a bottom-quark is performed. The analysis uses data acquired with proton-proton collisions at a center-of-mass energy of 8 TeV and observed with the ATLAS detector at the LHC, corresponding to 20.3 $fb^{-1}$ of integrated luminosity. The search focuses on scalar boson decays into tau lepton pairs, where each decays leptonically ($\tau \rightarrow l \nu_{\tau} \bar{\nu_{l}}$) resulting in one muon, one electron and four neutrinos. No significant excess is observed and upper limits on the signal strength are determined as a func
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50

Matić, Andrea [Verfasser], and Jeanette [Akademischer Betreuer] Lorenz. "Search for Dark Matter in association with a Higgs boson decaying into b-quarks with the ATLAS detector / Andrea Matić ; Betreuer: Jeanette Lorenz." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2020. http://d-nb.info/122784011X/34.

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