2,278 research outputs found
A Search for First Generation Leptoquarks in s^1/2 = 7 TeV pp Collisions with the ATLAS Detector
No full text179 pg.The Standard Model is an incomplete theory of nature. Numerous
extensions of the Standard Model predict the existence of leptoquarks (LQ), color-triplet
bosons which carry both baryon and lepton number. This dissertation presents the results of
a search for pair production of first generation scalar leptoquarks in the eMETjj final
state. The search is performed in pp collisions corresponding to an integrated luminosity of
1.03 fb^-1, at a center-of-mass energy s^1/2 = 7 TeV, recorded with the ATLAS detector at the
LHC. A multivariate discriminant is used to distinguish signal-like events from
background-like events. Observations are consistent with expectations from Standard Model
backgrounds, thus limits on allowed LQ mass are determined. First generation scalar
leptoquarks with mass m < 558 GeV are excluded at a 95% confidence level for Β =
BR(LQ % → eq) = 0.5. When combined with a complimentary search in the eejj final
state,
leptoquarks with mass m < 607 (660) GeV are excluded for Β = 0.5 (1.0). These are
the strongest limits in existence.Advisor(s): Rijssenbeek, Michael ; Tsybychev, Dmitri. Committee
Member(s): Teaney, Derek ; Ma, Hong.Stony Brook University Libraries. SBU Graduate School in Department of
Physics. Charles Taber (Dean of Graduate School)
Global Reinforcement Training of CrossNets
No full textStony Brook University Libraries.
SBU Graduate School in Physics.
Lawrence Martin (Dean of Graduate School), Konstantin K. Likharev - Dissertation Advisor
Distinguished Professor, Department of Physics and Astronomy, Peter W. Stephens - Chairperson of Defense
Professor, Department of Physics and Astronomy, Michael M. Rijssenbeek
Professor, Department of Physics and Astronomy, Paul R. Adams
Professor, Department of Neurobiology and Behavior
Laser Spectroscopy and Magneto-Optical Trapping of Rubidium Atoms
No full textStony Brook University Libraries.
SBU Graduate School in Physics and Astronomy.
Lawrence Martin (Dean of Graduate School), James E. Lukens
Professor, Department of Physics and Astronomy, Thomas K. Hemmick
Professor, Department of Physics and Astronomy, Michael M. Rijssenbeek
Professor, Department of Physics and Astronomy, Dominik A. Schneble
Thesis Advisor and Assistant Professor, Department of Physics and
Astronomy
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Measurement of M{sub W} Using the Transverse Mass Ratio of W and Z
No full textWe report on the measurement of W boson mass from a determination of the ratio of the transverse masses of {ital W} and {ital Z} using the DO detector at the Fermilab Tevatron {ital p{anti p}} Collider operating at {radical}{ital s} = 1.8 TeV. The analysis is a preliminary result based on a partial data sample of 13 pb{sup -1} using W {r_arrow} {ital e{sup -}{mu}{sup +}} and Z {r_arrow} {ital e{sup -}e{sup +}} decays. The mass ratio can also be extracted by comparing the shapes of the electron E{sub T} and & distribution from W and Z decays
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W Mass from the Tevatron
No full textWe report the preliminary W mass measurement at the Tevatron by the D0 collaboration using central electrons from the 1992-1995 data set: M{sub W}=80.37{+-}0.15 GeV/c{sup 2}. This value is combined with the previously reported measurement of M{sub W} by the CDF collaboration from their 1992-1993 data set of central electrons and muons, to obtain a new world average: M{sub W}=80.35{+-}0.13 GeV/c{sup 2}. We discuss the measurement procedure and its systematical uncertainties and indicate prospects for the full 1992- 1995 result from the Tevatron. 16 refs., 3 figs., 1 tab
The ECLW collaborative study III: training and reliability if ICD-10 diagnoses in the general hospital setting – an investigation of 220 consultants from 14 european countries.
No full textNOT AVAILABL
Asthma control: Patient and environment
No full textControl of asthma, the goal of asthma treatment, seems hard to obtain. However, it is largely unknown why control of asthma remains difficult in many patients in spite of available powerful medication. In this thesis we studied non-pharmacological factors influencing asthma control: patient related factors, such as adherence and health status, as well as environmental related factors such as exposure to house dust mite allergen. Finally we studied the effect of a combination of these patient and environment related factors as offered in high altitude treatment. This treatment combines patient centred treatment with a trigger free environment. When asthma is poorly controlled the search for patient and environmental related factors is important. Focussed intervention, based on these specific factors offers opportunities to achieve asthma control in patients with uncontrolled asthma. Conclusions: 1. Non-adherence is a frequent patient related factor in patients with controlled and uncontrolled asthma. 2. Measurement of clinical, physiological, functional and psychosocial domains of health status by the Nijmegen Clinical Screening Instrument (NCSI) provides a comprehensive, useful picture of the patient characteristics. The NCSI identifies factors and patterns that may influence control of asthma. 3. Mono intervention with anti- allergic mattress covers does not improve asthma control, however stabilizes the airway inflammation. 4. High altitude treatment, the combination of an asthma phenotype and health status based treatment with optimal reduction of environmental factors, is effective in patients with severe allergic and non-allergic uncontrolled asthma
The ATLAS Forward Proton Project
No full textPoster for the LHCP2014 Conference, New York, USA, 2-6 June 2014. The poster describes in short the ATLAS Forward Proton upgrade project, its physics program, and the detectors proposed
Forward Particle Detectors for the ATLAS Experiment at the Large Hadron Collider
No full textIn this presentation we discuss the operation and capabilities of the ATLAS Forward Detectors: LUCID, ALPHA, and the proposed AFP project
Forward physics with the ATLAS detector
No full textVery high-energy proton-proton interactions, and collisions of light and heavy ions are foreseen at the LHC. Proton beams will have an energy corresponding to 10/sup 17/ eV in the rest frame of target protons, almost approaching the highest energies observed in cosmic rays. In this range, accelerator data may help to answer questions about the primary cosmic ray composition and the cross sections of the very high energy cosmic rays on air. ATLAS is undertaking a program of elastic and diffractive physics, which overlaps the interests of the cosmic ray community. The ATLAS collaboration invites inquiry, ideas, and collaboration from the cosmic ray community in developing this program. (7 refs)
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