Recherche du partenaire supersymétrique du quark bottom au sein de l'expérience DØ auprès du TeVatron. Etudes sur l'énergie transverse manquante

Abstract : Supersymmetry, extension of the Standard Model of Particle Physics (SM), is searched for by trying to observe the supersymmetric partner of bottom quark (sb). This search is performed using events with a final state comprising two acoplanar b-quark jets and missing transverse energy (MET) and coming from a sample of 992~pb-1 of data collected by the D0 detector at the TeVatron, the Fermilab ppbar collider. The absence of an excess of events in comparison to MS expectations leads to exclude sb masses up to 201~GeV, neutralino masses up to 94~GeV. The MET has been studied under two points of view, because of its fundamental role in this search. First, at the level of the trigger system which allows the online selection candidate events, and then, within the framework of the ALPGEN generator, the simulation of the Z boson transverse momentum which appears as MET when the Z boson decays into neutrino.
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Submitted on : Monday, January 28, 2008 - 3:28:29 PM
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  • HAL Id : tel-00221399, version 1

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S. Calvet. Recherche du partenaire supersymétrique du quark bottom au sein de l'expérience DØ auprès du TeVatron. Etudes sur l'énergie transverse manquante. Physique des Hautes Energies - Expérience [hep-ex]. Université de la Méditerranée - Aix-Marseille II, 2007. Français. ⟨tel-00221399⟩

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