Skip to Main content Skip to Navigation
Theses

Mesure de la section éfficace de production de paires de quarks top/anti-top dans des collisions protons/anti-protons à \/s égale à 1.96 TeV auprès de l'expérience D0.

Abstract : The top quark (t) discovered in 1995, could manifest the existence of new interactions. The ttbar pair production is a background in analysis that search for rare decays.
The Tevatron is a proton/antu-proton collider with an energy of 1.96 TeV in the centre of mass. It produces ttbar paris with a theoritical cross section of 7 pb.
The ttbar production cross section is measured in the "electron+jets" channel with the D0 detector, using an integrated luminosity of 360pb-1. The topological differences are utilised to estimate the number of signal events within a sample enriched in W boson electronic decays. The result is 9.0 +/- 2.0 +/- 1.7 +/- 0.- pb.
The Calorimeter is essential in this measurement. The non-linearities and the gains of the calorimeter readout electronics are calibrated. The noise suppression algorigthm T42 is presented. It keeps cells with a signal above 4 sigma and their direct neighbors with a signal above 2.5sigma.
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00011503
Contributor : Jean-Roch Vlimant <>
Submitted on : Tuesday, January 31, 2006 - 2:32:15 PM
Last modification on : Friday, May 29, 2020 - 3:57:37 PM
Long-term archiving on: : Monday, September 17, 2012 - 11:25:11 AM

Identifiers

  • HAL Id : tel-00011503, version 1

Citation

Jean-Roch Vlimant. Mesure de la section éfficace de production de paires de quarks top/anti-top dans des collisions protons/anti-protons à \/s égale à 1.96 TeV auprès de l'expérience D0.. Physique des Hautes Energies - Expérience [hep-ex]. Université Pierre et Marie Curie - Paris VI, 2005. Français. ⟨tel-00011503⟩

Share

Metrics

Record views

295

Files downloads

156