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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Tests of the standard model in photoproduction at HERA and the LHC

de Favereau de Jeneret, Jérôme 03 April 2009 (has links)
Photoproduction has been used at colliders for decades in order to study hadronic properties of matter. The energy and luminosity of recent and future colliders allow probing also the electroweak sector through photon-photon and photon-proton interactions. At the HERA electron-proton collider, studies of the W boson production provide a stringent test of the Standard Model. At the LHC, photoproduction has to be separated from the overwhelming background of partonic interactions. A powerful ‘tagging’ technique can be introduced by adding special detectors placed far from the interaction point to detect forward scattered protons, usually present in photon-mediated processes. The HECTOR software package was written in order to provide accurate simulation of forward protons trajectories in the LHC beam-lines. These tools have been used in order to study the photoproduction of top quarks via flavor-changing neutral currents. This process is practically absent in the Standard Model, while it appears in some of its extensions. Detection of such a process would thus be an evidence for the existence of physics beyond the Standard Model.
12

An Improved W Boson Mass Measurement using the Collider Detector at Fermilab

Zeng, Yu January 2012 (has links)
<p>The mass of the $W$ boson is one of the most important parameters in the </p><p>Standard Model. A precise measurement of the $W$ boson mass, together </p><p>with a precise measurement of the top quark mass, can constrain the </p><p>mass of the undiscovered Higgs boson within the Standard Model </p><p>framework or give a hint for physics beyond the Standard Model. </p><p>This dissertation describes a measurement of the $W$ boson mass </p><p> through its decay into a muon and a neutrino using </p><p> $\approx$ 2.2 fb$^{-1}$ of $\sqrt{s} = 1.96$ TeV $p\bar{p}$ data taken </p><p> with the CDF II detector at Fermilab. We measure the $W$ boson mass </p><p> to be ($80.374 \pm 0.015_{\rm stat.} \pm 0.016_{\rm syst.}$) </p><p> GeV/c$^2$. This result, when combined with the $W$ mass </p><p> measurement in the electron channel, leads to the single most </p><p> precise $m_W$ value and greatly constrains the possible mass </p><p> range of the undiscovered Higgs boson.</p> / Dissertation
13

Search for the Higgs Boson in H -] WW decays at the DØ experiment and precise muon tracking

Elmsheuser, Johannes. Unknown Date (has links) (PDF)
University, Diss., 2004--München.
14

Bestimmung der Masse und Breite des W-Bosons im semileptonischen Zerfallskanal mit dem OPAL-Detektor bei LEP

Vollmer, Cornelius Fritz. Unknown Date (has links) (PDF)
Universiẗat, Diss., 2004--München.
15

Colour reconnection in hadronischen W-Paar-Zerfällen

Sahr, Oliver. Unknown Date (has links)
Universiẗat, Diss., 2001--München.
16

Measurement of the W boson mass in the W+W- -] qqln channel with the OPAL detector at LEP

Dubbert, Jörg. Unknown Date (has links)
University, Diss., 2001--München.
17

Messung der Produktion von einzelnen W-Bosonen und der Selbstkopplungen von Eichbosonen in der e+e--Streuung bei s=61-169 GeV

Verzocchi, Marco. Unknown Date (has links) (PDF)
University, Diss., 2000--Freiburg (Breisgau). / Parallelt.: Measurement of single w production and triple gauge boson couplings in e+e- collisions at s=161-189 GeV. Text. engl.
18

Messung der qqln-Endzustände der W-Paar-Produktion bei Schwerpunktsenergien von 183 GeV bis 202 GeV mit dem L3-Detektor bei LEP

Niessen, Thomas. Unknown Date (has links) (PDF)
Techn. Hochsch., Diss., 2000--Aachen. / Gedr. Ausg. im Physikalischen Inst., Aachen.
19

Measurement of the W boson mass with the ALEPH detector

Leibenguth, Guillaume. Unknown Date (has links)
University, Diss., 2002--Heidelberg.
20

Measurement of the W charge asymmetry in production with jets using 5 inverse-femtobarns of data measured at sqrt(s)=7 TeV with CMS

Lawson, Philip Daniel 22 January 2016 (has links)
A measurement of the electron charge asymmetry in p+→W production in association with jets at sqrt{s}=7 TeV is presented. The dataset corresponds to an integrated luminosity of L=5fb^-1 recorded by the CMS detector in proton-proton collisions at the LHC. The sample represents a large increase in statistical precision with respect to previous CMS results and describes a first study of charge asymmetry measured in p+p→W+1 jet events. Full comparisons to previous results and theoretical predictions are provided and recommendations for extending the analysis to produce valuable input for future PDF models are made.

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