32 documents found, page 1 of 4
Search for supersymmetry with gauge-mediated breaking in diphoton events at D0
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, D. L.; Adams, M.; Adams, T.; Agelou, M.; Agram, J. L.; Ahmed, S. N.; Ahn, S. H.Made available in DSpace on 2022-04-28T19:57:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-02-04; We report the results of a search for supersymmetry (SUSY) with gauge-mediated breaking in the missing transverse energy distribution of inclusive diphoton events using 263 pb-1 of data collected by the DO experiment at the Fermilab Tevatron Collider in 2002-2004. No excess is observed above the backgro...
Measurement of the Bs0 lifetime in the exclusive decay channel Bs0 → J/ψφ
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, D. L.; Adams, M.; Adams, T.; Agelou, M.; Agram, J. L.; Ahmed, S. N.; Ahn, S. H.Made available in DSpace on 2022-04-28T19:57:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-02-04; Using the exclusive decay Bs0 → J/ψ (μ+μ-)φ (K+K-), we report the most precise single measurement of the Bs0 lifetime. The data sample corresponds to an integrated luminosity of approximately 220 pb-1 collected with the DO detector at the Fermilab Tevatron Collider in 2002-2004. We reconstruct 337 signa...
Measurement of the Λ b 0 lifetime in the decay Λ b 0 → J/ψΛ 0 with the D0 detector
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Agelou, M.; Agram, J. L.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.Made available in DSpace on 2022-04-28T19:57:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-03-18; We present measurements of the Λ b 0 lifetime in the exclusive decay channel Λ b 0 → J/ψΛ 0with J/ψ → μ +μ - and Λ 0 → pπ -, the B 0 lifetime in the decay B 0 → J/ψ/K s 0 with J/ ψ → μ + μ - and K s 0 → π + π -, and the ratio of these lifetimes. The analysis is based on approximately 250 pb -1 of data r...
Search for Anomalous Heavy-Flavor Quark Production in Association with W Bosons
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Agelou, M.; Agram, J. L.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.Made available in DSpace on 2022-04-28T19:58:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-04-22; We search for anomalous production of heavy-flavor quark jets in association with W bosons at the Fermilab Tevatron pp̄ Collider in final states in which the heavy-flavor quark content is enhanced by requiring at least one tagged jet in an event. Jets are tagged using one algorithm based on semileptonic...
Search for Wbb̄ and W H production in pp̄ collisions at √s = 1.96 TeV
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Agelou, M.; Agram, J. L.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.Made available in DSpace on 2022-04-28T19:58:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-03-11; We present a search for Wbb̄ production in pp̄ collisions at √s = 1.96 TeV in events containing one electron, an imbalance in transverse momentum, and two b-tagged jets. Using 174 pb-1 of integrated luminosity accumulated by the D0 experiment at the Fermilab Tevatron collider, and the standard-model des...
Measurement of the ratio of inclusive cross sections σ(pp̄ → Z + b jet)/σ-(pp̄ ...
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Agelou, M.; Agram, J. L.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.Made available in DSpace on 2022-04-28T19:59:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-04-29; Using the data collected with the DO detector at √ s = 1-96 TeV, for integrated luminosities of about 180 pb-1, we have measured the ratio of inclusive cross sections for pp̄ → Z + b jet to pp̄ → Z + jet production. The inclusive Z + b-jet reaction is an important background to searches for the Higgs bo...
Measurement of the WW production cross section in pp̄ collisions at √s=1.96 TeV
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Agelou, M.; Agram, J. L.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.Made available in DSpace on 2022-04-28T19:59:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-04-22; We present a measurement of the W boson pair-production cross section in pp̄ collisions at a center-of-mass energy of √s = 1.96 TeV. The data, collected with the Run II D0 detector at Fermilab, correspond to an integrated luminosity of 224-252 pb-1 depending on the final state (ee, eμ, or μμ). We observ...
Measurement of the tt̄ 1.96 TeV i pp̄ collisions at √s = 1.96 TeV in dilepton f...
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Agelou, M.; Agram, J. L.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.Made available in DSpace on 2022-04-28T20:00:48Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-10-01; Universidad de Buenos Aires; LAFEX Centro Brasileiro de Pesquisas Físicas; Universidade do Estado do Rio de Janeiro; Instituto de Física Teórica Universidade Estadual Paulista; University of Alberta; Simon Fraser University; York University; McGill University; Institute of High Energy Physics; Universit...
Search for Randall-Sundrum gravitons in dilepton and diphoton final states
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Agelou, M.; Agram, J. L.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.Made available in DSpace on 2022-04-28T20:02:00Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-08-26; We report the first direct search for the Kaluza-Klein (KK) modes of Randall-Sundrum gravitons using dielectron, dimuon, and diphoton events observed with the D0 detector operating at the Fermilab Tevatron pp̄ Collider at s=1.96TeV. No evidence for resonant production of gravitons has been found in the ...
Measurement of the ratio of B+ and B0 meson lifetimes
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Agelou, M.; Agram, J. L.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.Made available in DSpace on 2022-04-28T20:02:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-05-13; The ratio of the B+ and B0 meson lifetimes was measured using data collected in 2002-2004 by the D0 experiment in RunII of the Fermilab Tevatron Collider. These mesons were reconstructed in B→μ+νD*-X decays, which are dominated by B0 and B→μ+νD̄0X decays, which are dominated by B+. The ratio of lifetime...