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Observation And Properties Of The X(3872) Decaying To J/Ψπ+Π- In Pp̅ Collisions At √S = 1.96 Tev, V. M. Abazov, Gregory R. Snow, D0 Collaboration
Observation And Properties Of The X(3872) Decaying To J/Ψπ+Π- In Pp̅ Collisions At √S = 1.96 Tev, V. M. Abazov, Gregory R. Snow, D0 Collaboration
Gregory Snow Publications
We report the observation of the X(3872) in the J/ψπ+π- channel, with J/ψ decaying to μ+μ-, in pp̅ collisions at √s = 1.96 TeV. Using approximately 230 pb-1 of data collected with the Run II D0 detector, we observe 522 ± 100 X(3872) candidates. The mass difference between the X(3872) state and the J=J/ψ is measured to be 774.9 ± 3.1(stat) ± 3.0(syst) MeV/c2. We have investigated the production and decay characteristics of the X(3872) and find them to be …
Search For Doubly Charged Higgs Boson Pair Production In The Decay To Μ+Μ+Μ-Μ- In Pp̅ Collisions At √S = 1.96 Tev, V. M. Abazov, Gregory R. Snow, D0 Collaboration
Search For Doubly Charged Higgs Boson Pair Production In The Decay To Μ+Μ+Μ-Μ- In Pp̅ Collisions At √S = 1.96 Tev, V. M. Abazov, Gregory R. Snow, D0 Collaboration
Gregory Snow Publications
A search for pair production of doubly charged Higgs bosons in the process pp̅ → H++H-- → μ+μ+μ-μ- is performed with the D0 run II detector at the Fermilab Tevatron. The analysis is based on a sample of inclusive dimuon data collected at an energy of √s = 1.96 TeV, corresponding to an integrated luminosity of 113 pb-1. In the absence of a signal, 95% confidence level mass limits of M(HL±±) > 118.4 GeV/c2 and M(HR±±) …
Search For Pair Production Of Light Scalar Top Quarks In Pp̅ Collisions At √S = 1.8 Tev, V. M. Abazov, Gregory R. Snow, D0 Collaboration
Search For Pair Production Of Light Scalar Top Quarks In Pp̅ Collisions At √S = 1.8 Tev, V. M. Abazov, Gregory R. Snow, D0 Collaboration
Gregory Snow Publications
Using 85.2 ± 3.6 pb1 of pp̅ collisions collected at √s = 1.8 TeV with the D0 detector at Fermilab’s Tevatron Collider, we present the results of a search for direct pair production of scalar top quarks (t̃), the supersymmetric partners of the top quark. We examined events containing two or more jets and missing transverse energy, the signature of light scalar top quark decays to charm quarks and neutralinos. After selections, we observe 27 events while expecting 31.1 ± 6.4 events from known standard model processes. Comparing these results to next-to-leading-order production cross sections, we …
Search For Narrow Tt̅ Resonances In Pp̅ Collisions At √S = 1.8 Tev, V. M. Abazov, Gregory R. Snow, D0 Collaboration
Search For Narrow Tt̅ Resonances In Pp̅ Collisions At √S = 1.8 Tev, V. M. Abazov, Gregory R. Snow, D0 Collaboration
Gregory Snow Publications
A search for narrow resonances that decay into tt̅ pairs has been performed using 130 pb-1 of data in the lepton + jets channel collected by the DØ detector in pp̅ collisions at √s = 1.8 TeV. There is no significant deviation observed from the standard-model predictions at a top-quark mass of 175 GeV/c2. We therefore present upper limits at the 95% confidence level on the product of the production cross section and branching fraction to tt̅ for narrow resonances as a function of the resonance mass Mx. These limits are used to …
Search For New Particles In The Two-Jet Decay Channel With The Dø Detector, V. M. Abazov, Gregory R. Snow, D0 Collaboration
Search For New Particles In The Two-Jet Decay Channel With The Dø Detector, V. M. Abazov, Gregory R. Snow, D0 Collaboration
Gregory Snow Publications
We present the results of a search for the production of new particles decaying into two jets in p̅p collisions at √s =1.8 TeV, using the DØ 1992–1995 data set corresponding to 109 pb-1. We exclude at the 95% confidence level the production of excited quarks (q*) with masses below 775 GeV/c2, the most restrictive limit to date. We also exclude standard-model-like W′ (Z′) bosons with masses between 300 and 800 GeV/c2 (400 and 640 GeV/c2). A W8 boson with mass ,786 GeV/ …