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Observation of the doubly strange b-Baryon Omega(b)-

Description: This thesis reports the first experimental evidence of the doubly strange b-baryon {Omega}{sub b}{sup -} (ssb) following the decay channel {Omega}{sub b}{sup -} {yields} J/{psi}(1S) {mu}{sup +}{mu}{sup -} {Omega}{sup -} {Lambda} K{sup -} p {pi}{sup -} in p{bar p} collisions at {radical}s = 1.96 Tev. Using approximately 1.3 fb{sup -1} of data collected with the D0 detector at the Fermilab Tevatron Collider, they observe 17.8 {+-} 4.9(stat) {+-} 0.8(syst) {Omega}{sub b}{sup -} signal events at 6.… more
Date: February 1, 2011
Creator: Hernandez Orduna, de Jesus, Jose
Partner: UNT Libraries Government Documents Department
open access

Search for r-parity violating supersymmetry in the multilepton final state

Description: This thesis presents a search for physics beyond the standard model of elementary particles in events containing three or more charged leptons in the final state. The search is based on an R-parity violating supersymmetric model that assumes supersymmetric particles are pair produced at hadron colliders and the R-parity violating coupling is small enough so that these particles ''cascade'' decay into the lightest supersymmetric particle. The lightest supersymmetric particle may only decay into … more
Date: November 1, 2006
Creator: Attal, Alon J.
Partner: UNT Libraries Government Documents Department
open access

A search for charge 1/3 third generation leptoquarks in muon channels

Description: Leptoquarks are exotic particles that have color, electric charge, and lepton number and appear in extended gauge theories and composite models. Current theory suggests that leptoquarks would come in three different generations corresponding to the three quark and lepton generations. We are searching for charge 1/3 third generation leptoquarks produced in p{bar p} collisions at {radical}s = 1.96 TeV using data collected by the D0 detector. Such leptoquarks would decay into either a tau-neutrino… more
Date: August 1, 2006
Creator: Uzunyan, Sergey A.
Partner: UNT Libraries Government Documents Department
open access

A search for third generation scalar leptoquarks

Description: Leptoquarks (LQ) are particles with both color and lepton number predicted in some gauge theories and composite models. Current theory suggests that leptoquarks would come in three different generations. We report on a search for charge 1/3 third generation leptoquarks produced in p{bar p} collisions at {radical}s = 1.96 TeV using data collected by the D0 detector at Fermilab. Such leptoquarks would decay into a tau-neutrino plus a b-quark with branching fraction B. We present preliminary resul… more
Date: August 1, 2006
Creator: Zatserklyaniy, Andriy
Partner: UNT Libraries Government Documents Department
open access

Search for r-parity violating supersymmetry in multilepton final states with the D0 detector

Description: Results obtained from a search for the trilepton signature {mu}{mu}{ell} (with {ell} = e, or {mu}) are combined with two complementary searches for the trilepton signatures ee{ell} and eer and interpreted in the framework of R-parity violating Supersymmetry. Pairwise, R-parity conserving production of the supersymmetric particles is assumed, followed by R-parity violating decays via an LL{bar E}-operator with one dominant coupling {lambda}{sub 122}. An LL{bar E}-operator couples two weak isospi… more
Date: November 1, 2006
Creator: Kaefer, Daniela
Partner: UNT Libraries Government Documents Department
open access

Search for the standard model Higgs boson in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV

Description: A scientifically accurate description of matter interpreted as a substance made up of corpuscular constituents was established during the course of the 19th century. In this description, atoms - the building blocks of the matter - form molecules. The properties of the molecules were described by chemistry or thermodynamics depending on what characteristics of the matter were investigated. In both theories, the molecules can dissociate to atoms when the kinetic energies of the atoms exceed the s… more
Date: August 1, 2007
Creator: Veszpremi, Viktor
Partner: UNT Libraries Government Documents Department
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