557 documents found, page 1 of 56
Color evaporation description of inelastic photoproduction of J/ Ψ at DESY HERA
Éboli, O. J.P.; Gregores, E. M. [UNESP]; Halzen, F.Made available in DSpace on 2022-04-28T19:57:00Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-01-01; The H1 Collaboration recently reported a new analysis of data on the inelastic photoproduction of J/Ψ mesons at DESY's HERA ep collider. We show that these new experimental results are well described by the color evaporation model for quarkonium production. Moreover, these new data require the introduct...
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 σ(pp̄→Z)·Br(Z→ττ) 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 2022-04-28T19:59:56Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-04-01; We present a measurement of the cross section for Z production times the branching fraction to τ leptons, σ·Br(Z → τ<sup>+</sup>τ<sup>-</sup>), in pp̄ collisions at √s = 1.96 TeV in the channel in which one τ decays into μν<inf>μ</inf>ν <inf>τ</inf>, and the other into hadrons + ν<inf>τ</inf> or eν<inf>...
Search for first-generation scalar leptoquarks 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 2022-04-28T20:00:19Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-04-01; We report on a search for pair production of first-generation scalar leptoquarks (LQ) in pp̄ collisions at √s = 1.96 TeV using an integrated luminosity of 252 pb<sup>-1</sup> collected at the Fermilab Tevatron collider by the D0 detector. We observe no evidence for LQ production in the topologies arisin...