Search For The Higgs Boson And For Anomalous Quartic Gauge Boson Couplings In The Ww Channel With Dielectron Events With The D0 Experiment At The Tevatron Recherche Du Boson De Higgs Et De Couplages De Jauge Quartiques Anormaux Dans Le Canal Ww En Electrons Dans Lexperience D0 Au Tevatron
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Total Pages | : 268 |
Release | : 2013 |
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Le paysage de la physique des particules a subi des changements majeurs entre le début de cette thèse, en septembre 2010, et sa n en juin 2013. On peut notamment qualier l'année 2012 de date-clé dans l'histoire de la physique des particules. En 2012, une nouvelle particule a été découverte au LHC [1, 2], dont la majeure partie de la communauté s'accorde aujourd'hui à dire qu'il s'agit très probablement du boson de Higgs. Cet événement est intervenu peu après une sorte de passage de relais entre le Tevatron, arrêté le 30 septembre 2011, et le LHC, dont les toutes premières collisions sont intervenues le 23 novembre 2009.
Author | : Lourdes María Urda Gómez |
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Total Pages | : 0 |
Release | : 2023 |
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Total Pages | : 268 |
Release | : 2013 |
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Author | : Alex Melnitchouk |
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Total Pages | : 3 |
Release | : 2006 |
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We present two searches for the Higgs boson in {radical}s = 1.96 TeV p{bar p} collisions using data taken with the D0 detector during Run II of the Fermilab Tevatron collider. The first study is a search for neutral Higgs bosons produced in association with bottom quarks. The cross sections for these processes are enhanced in many extensions of the standard model (SM), such as in its minimal supersymmetric extension at large tan {beta}. The results of our analysis agree with expectations from the SM, and we use our measurements to set upper limits on the production of neutral Higgs bosons in the mass range of 90 to 150 GeV. The second study is a search for the standard model Higgs boson produced in association with the Z boson. We study the p{bar p} {yields} ZH {yields} {nu}{bar {nu}}b{bar b} channel, which is one of the most sensitive ways to search for light Higgs bosons at the Tevatron. We select multijet events with large imbalance in transverse momentum and two b-tagged jets. Then we search for a peak in invariant mass distribution of two b-tagged jets. After subtracting the backgrounds, we set the 95% C.L. upper limits on the {sigma}(p{bar p} {yields} ZH {yields} {nu}{bar {nu}}) x BR(H {yields} b{bar b}) for Higgs masses between 105 and 135 GeV.
Author | : James Matthew Heinmiller |
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Total Pages | : 252 |
Release | : 2006 |
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ISBN | : 9781109872330 |
This analysis describes a search for a standard model Higgs boson produced in association with a Z boson through the decay mode ZH → e+e -bb in pp collisions at s = 1.96 TeV at the Fermilab Tevatrot Collider. The data sample used in this analysis corresponds to 452 pb-1 of integrated luminosity accumulated with the DO detector. Agreement between data and standard model predictions is observed. A 95% confidence level upper exclusion limit for the sigma(pp → ZH x BR(H → bb) channel is set between 3.2--8.2 pb for Higgs masses of 105 to 145 GeV.
Author | : Martin Hennecke |
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Total Pages | : 186 |
Release | : 2005 |
Genre | : Tevatron - Higgs-Teilchen |
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Author | : Jakob Maximilian Henry Salfeld-Nebgen |
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Total Pages | : 182 |
Release | : 2014 |
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Author | : Kamal Saoucha |
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Total Pages | : 0 |
Release | : 2022 |
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Total Pages | : 18 |
Release | : 2013 |
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Author | : Marine Michaut |
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Total Pages | : 210 |
Release | : 2006 |
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