49 documents found, page 1 of 5
Measurement of the σ- charge radius by σ--electron elastic scattering
Eschrich, I.; Krüger, H.; Simon, J.; Vorwalter, K.; Alkhazov, G.; Atamantchouk, A. G.; Balatz, M. Y.; Bondar, N. F.; Cooper, P. S.; Dauwe, L. J.Made available in DSpace on 2022-04-28T19:55:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2001-12-13; The σ- mean squared charge radius has been measured in the space-like Q2 range 0.035-0.105 GeV2/c2 by elastic scattering of a σ- beam off atomic electrons. The measurement was performed with the SELEX (E781) spectrometer using the Fermilab hyperon beam at a mean energy of 610 GeV/c. We obtain (rch2σ- = ...
Production asymmetry of Ds from 600 GeV/c σ- and π- beam
Kaya, M.; Alkhazov, G.; Atamantchouk, A. G.; Balatz, M. Y.; Bondar, N. F.; Cooper, P. S.; Dauwe, L. J.; Davidenko, G. V.; Dersch, U.; Dolgolenko, A. G.Made available in DSpace on 2022-04-28T19:55:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-04-10; The production of Ds- relative to Ds+ as a function of xF with 600 GeV/c Σ- beam is measured in the interval 0.15 < xF < 0.7 by the SELEX (E781) experiment at Fermilab. The integrated charge asymmetries with 600 GeV/c Σ- beam (0.53 ± 0.06) and π- beam (0.06 ± 0.11) are also compared. The results show th...
Total cross section measurements with π- , Σ- and protons on nuclei and nucleon...
Dersch, U.; Akchurin, N.; Andreev, V. A.; Atamantchouk, A. G.; Aykac, M.; Balatz, M. Y.; Bondar, N. F.; Bravar, A.; Cooper, P. S.; Dauwe, L. J.Made available in DSpace on 2022-04-28T19:56:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2000-07-17; Total cross sections for Σ- and π- on beryllium, carbon, polyethylene and copper as well as total cross sections for protons on beryllium and carbon have been measured in a broad momentum range around 600GeV/c . These measurements were performed with a transmission technique in the SELEX hyperon-beam ex...
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...
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...
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 right-handed W bosons in top quark decay
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 2022-04-28T20:01:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-07-01; We present a measurement of the fraction f+ of right-handed W bosons produced in top quark decays, based on a candidate sample of tt̄ events in the lepton+jets decay mode. These data correspond to an integrated luminosity of 230pb-1, collected by the D0 detector at the Fermilab Tevatron pp̄ Collider at ...
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 ...
Study of Zγ events and limits on anomalous ZZγ and Zγγ couplings in pp̄ collisi...
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 2022-04-28T20:02:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-07-29; We present a measurement of the Zγ production cross section and limits on anomalous ZZγ and Zγγ couplings for form-factor scales of Λ=750 and 1000 GeV. The measurement is based on 138 (152) candidates in the eeγ (μμγ) final state using 320(290)pb-1 of pp̄ collisions at s=1.96TeV. The 95% C.L. limits on ...