4,126 research outputs found
Searches for New Physics at D0
The integrated luminosity at Run 2 of the Tevatron is approaching the Run 1
total, and data analysis is progressing. New results in searches for new
physics by the DO experiment are presented in a variety of channels,
demonstrating good performance of the detector and detailed understanding of
the data.Comment: 6 pages, proceedings of the 38th Rencontres de Morion
Top Quark Mass Measurements at the Tevatron
The general strategy, as well as channel-specific details, applied to the
measurement of the top quark mass at the Tevatron in Run I are reviewed, and
the combination of the results obtained by the CDF and DO collaborations
presented. The accelerator and detector upgrades for Run II are described, and
expected improvements in the systematic uncertainties on the measurement
evaluated.Comment: Latex (Frascati.sty), 11 pages, 3 figs. Talk given at the 14th
Rencontres de Physique de la Vallee d'Aoste, La Thuile, Aosta Valley, Italy,
February 200
Mixing and CP Violation at the Tevatron
Measurements of meson mixing and CP violation parameters obtained by the CDF
and D0 experiments at the Fermilab Tevatron are presented. These include
results on and meson mixing, and searches for CP violation in the
decay , in mixing through semileptonic meson decays,
and in the interference between mixing and decay in the process .Comment: 9 pages, Proceedings of the Hadron Collider Physics Symposium
(HCP2008),Galena, Illinois, US
Determination of Scanning Efficiencies in Experiments Using Nuclear Emulsion Sheets
During their exposure, nuclear emulsion sheets detect both tracks from
experiment-related particles, as well as a considerable amount of background
tracks, mainly due to cosmic rays. Unless the exposure has been fairly short,
it is therefore fairly likely that a fraction of the tracks that have been
identified as belonging to the particles the experiment is interested in, are
really due to background. A method, which allows to measure this fraction
reliably directly from the data, is described.Comment: 7 pages, uses elsart, to be published in NIMA 450, p 44
High pT Hadronic Top Quark Identification
At the LHC objects with masses at the electroweak scale will for the first time be produced with very large transverse momenta. In many cases, these objects decay hadronically, producing a set of collimated jets. This interesting new experimental phenomenology requires the development and tuning of new tools, since the usual reconstruction methods would simply reconstruct a single jet. This note describes the application of the YSplitter algorithm in conjunction with the jet mass to identify high transverse momentum top quarks decaying hadronically
A Supersymmetric Solution to the Solar and Atmospheric Neutrino Anomalies
The formalism for neutrino flavor change induced by lepton family number
violating interactions is developed for the three-neutrino case, and used to
derive the corresponding flavor change probabilities in matter. Applied to the
solar and atmospheric neutrino fluxes, it is argued that the observed
anomalies, including the zenith dependence for the atmospheric case, could be
due to such interactions.Comment: 6 pages, 1 figure Modifications: include limit from tau -> rho mu
(leads to somewhat different conclusions) and a change to the figur
Signals of Parity Restoration at ATLAS and CMS
An overview of the ATLAS and CMS discovery potential for signals of parity restoration at high energy is given
Top Reconstruction Algorithms in ATLAS
A brief overview of top reconstruction algorithms in ATLAS is given
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