75 documents found, page 1 of 8
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...
Search for supersymmetry via associated production of charginos and neutralinos...
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 2022-04-28T20:05:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-10-07; A search for associated production of charginos and neutralinos is performed using data recorded with the D0 detector at a pp» center-of-mass energy of 1.96 TeV at the Fermilab Tevatron Collider. This analysis considers final states with missing transverse energy and three charged leptons, of which at l...
Measurement of the lifetime difference in the Bs0 system
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 2022-04-28T20:05:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-10-21; We present a study of the decay Bs0â†'J/ÏÏ•. We obtain the CP-odd fraction in the final state at time zero, R⚥=0.16±0.10(stat)±0.02(syst), the average lifetime of the (Bs0, BÂs0) system, Ï.,Â(Bs0)=1.39- 0.16+0.13(stat)-0.02+0.01(syst)ps, and the relative width difference between the heavy and light ...
Search for neutral supersymmetric higgs bosons in multijet events at s=1.96TeV
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 2022-04-28T20:06:00Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-10-07; We have performed a search for neutral Higgs bosons produced in association with bottom quarks in pp collisions, using 260pb-1 of data collected with the D0 detector in Run II of the Fermilab Tevatron Collider. The cross sections for these processes are enhanced in many extensions of the standard model...
Search for large extra spatial dimensions in dimuon production with the D0 dete...
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 2022-04-28T20:06:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-10-14; We present the results of a search for the effects of large extra spatial dimensions in pp_collisions at s=1.96TeV in events containing a pair of energetic muons. The data correspond to 246pb-1 of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider. Good agreement with...
Search for excited muons in pp̄ collisions at s=1.96TeV
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 2022-04-28T20:07:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-06-08; We present the results of a search for the production of an excited state of the muon, μ*, in proton antiproton collisions at s=1.96TeV. The data have been collected with the D0 experiment at the Fermilab Tevatron Collider and correspond to an integrated luminosity of approximately 380pb-1. We search fo...
Measurement of the top quark mass in the lepton+jets final state with the matri...
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Agelou, M.; Aguilo, E.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.Made available in DSpace on 2022-04-28T20:12:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-12-06; We present a measurement of the top quark mass with the matrix element method in the lepton+jets final state. As the energy scale for calorimeter jets represents the dominant source of systematic uncertainty, the matrix element likelihood is extended by an additional parameter, which is defined as a glo...
Measurement of Bd mixing using opposite-side flavor tagging
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Agelou, M.; Aguilo, E.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.Made available in DSpace on 2022-04-28T20:13:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-12-21; We report on a measurement of the Bd0 mixing frequency and the calibration of an opposite-side flavor tagger in the D0 experiment. Various properties associated with the b quark on the opposite side of the reconstructed B meson are combined using a likelihood-ratio method into a single variable with enh...
Experimental discrimination between charge 2e/3 top quark and charge 4e/3 exoti...
Abazov, V. M.; Abbott, B.; Abolins, M.; Acharya, B. S.; Adams, M.; Adams, T.; Agelou, M.; Ahn, S. H.; Ahsan, M.; Alexeev, G. D.; Alkhazov, G.; Alton, A.Made available in DSpace on 2022-04-28T20:14:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-01-30; We present the first experimental discrimination between the 2e/3 and 4e/3 top quark electric charge scenarios, using top quark pairs (tt̄) produced in pp̄ collisions at s=1.96TeV by the Fermilab Tevatron Collider. We use 370pb-1 of data collected by the D0 experiment and select events with at least one...