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University of Nebraska - Lincoln

2010

Kenneth Bloom Publications

Articles 1 - 7 of 7

Full-Text Articles in Physics

Search For A Resonance Decaying Into Wz Boson Pairs In Pp Collisions, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration Jan 2010

Search For A Resonance Decaying Into Wz Boson Pairs In Pp Collisions, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration

Kenneth Bloom Publications

We present the first search for an electrically charged resonance W’ decaying to a WZ boson pair using 4.1 fb-1 of integrated luminosity collected with the D0 detector at the Fermilab Tevatron pp collider. The WZ pairs are reconstructed through their decays into three charged leptons (ℓ = e, μ). A total of 9 data events is observed in good agreement with the background prediction. We set 95% C.L. limits on the W’WZ coupling and on the W’ production cross section multiplied by the branching fractions. We also exclude W’ masses between 188 and 520 …


Search For The Associated Production Of A B Quark And A Neutral Supersymmetric Higgs Boson That Decays Into Τ Pairs, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration Jan 2010

Search For The Associated Production Of A B Quark And A Neutral Supersymmetric Higgs Boson That Decays Into Τ Pairs, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration

Kenneth Bloom Publications

We report results from a search for production of a neutral Higgs boson in association with a b quark. We search for Higgs decays to τ pairs with one τ subsequently decaying to a muon and the other to hadrons. The data correspond to 2.7 fb-1 of pp collisions recorded by the D0 detector at √s = 1.96 TeV. The data are found to be consistent with background predictions. The result allows us to exclude a significant region of parameter space of the minimal supersymmetric model.


Combination Of Tevatron Searches For The Standard Model Higgs Boson In The W+W- Decay Mode, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration Jan 2010

Combination Of Tevatron Searches For The Standard Model Higgs Boson In The W+W- Decay Mode, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration

Kenneth Bloom Publications

We combine searches by the CDF and D0 Collaborations for a Higgs boson decaying to W+W-. The data correspond to an integrated total luminosity of 4.8 (CDF) and 5.4 (D0) fb-1 of pp collisions at √s = 1.96 TeV at the Fermilab Tevatron collider. No excess is observed above background expectation, and resulting limits on Higgs boson production exclude a standard model Higgs boson in the mass range 162–166 GeV at the 95% C.L.


Search For The Standard Model Higgs Boson In The Zh → ΝνBb Channel In 5.2 Fb-1 Of Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration Jan 2010

Search For The Standard Model Higgs Boson In The Zh → ΝνBb Channel In 5.2 Fb-1 Of Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration

Kenneth Bloom Publications

A search is performed for the standard model Higgs boson in 5.2 fb-1 of pp collisions at √s = 1.96 TeV, collected with the D0 detector at the Fermilab Tevatron Collider. The final state considered is a pair of b jets and large missing transverse energy, as expected from ppZH → ννbb production. The search is also sensitive to the WH → ℓνbb channel when the charged lepton is not identified. For a Higgs boson mass of 115 GeV, a limit is set at the 95% C.L. on the cross section multiplied by branching …


Search For Higgs Boson Production In Dilepton And Missing Energy Final States With 5.4 Fb-1 Of Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration Jan 2010

Search For Higgs Boson Production In Dilepton And Missing Energy Final States With 5.4 Fb-1 Of Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration

Kenneth Bloom Publications

A search for the standard model Higgs boson is presented using events with two charged leptons and large missing transverse energy selected from 5.4 fb-1 of integrated luminosity in pp collisions at √s = 1.96 TeV collected with the D0 detector at the Fermilab Tevatron collider. No significant excess of events above background predictions is found, and observed (expected) upper limits at 95% confidence level on the rate of Higgs boson production are derived that are a factor of 1.55 (1.36) above the predicted standard model cross section at mH = 165 GeV.


Double Parton Interactions In Γ = 3 Jet Events In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration Jan 2010

Double Parton Interactions In Γ = 3 Jet Events In Pp Collisions At √S = 1.96 Tev, V. M. Abazov, Kenneth A. Bloom, Gregory Snow, D0 Collaboration

Kenneth Bloom Publications

We have used a sample of γ + 3 jets events collected by the D0 experiment with an integrated luminosity of about 1 fb-1 to determine the fraction of events with double parton scattering (fDP) in a single pp collision at √s = 1.96 TeV. The DP fraction and effective cross section (τeff ), a process-independent scale parameter related to the parton density inside the nucleon, are measured in three intervals of the second (ordered in pT) jet transverse momentum pjet2T within the range 15 ≤ pjet2T ≤ …


Debugging Data Transfers In Cms, G. Gagliesi, S. J. Belforte, Kenneth A. Bloom, B. Bockelman, D. Bonacorsi, I. Fisk, J. Flix, J. Hernandez, J. D'Hondt, M. Kadastik, J. Klem, O. Kodolova, C.-M. Kuo, J. Letts, J. Maes, N. Magini, S. Metson, J. Piedra, N. Pukhaeva, L. Turra, S. Sõnajalg, Y. Wu, P. Van Mulders, I. Villella, F. Würthwein Jan 2010

Debugging Data Transfers In Cms, G. Gagliesi, S. J. Belforte, Kenneth A. Bloom, B. Bockelman, D. Bonacorsi, I. Fisk, J. Flix, J. Hernandez, J. D'Hondt, M. Kadastik, J. Klem, O. Kodolova, C.-M. Kuo, J. Letts, J. Maes, N. Magini, S. Metson, J. Piedra, N. Pukhaeva, L. Turra, S. Sõnajalg, Y. Wu, P. Van Mulders, I. Villella, F. Würthwein

Kenneth Bloom Publications

The CMS experiment at CERN is preparing for LHC data taking in several
computing preparation activities. In early 2007 a traffic load generator infrastructure for distributed data transfer tests was designed and deployed to equip the WLCG tiers which support the CMS virtual organization with a means for debugging, load-testing and commissioning data transfer routes among CMS computing centres. The LoadTest is based upon PhEDEx as a reliable, scalable data set replication system. The Debugging Data Transfers (DDT) task force was created to coordinate the debugging of the data transfer links. The task force aimed to commission most crucial transfer …