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Showing 1 to 20 of 56 for “"CLAS"”.
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Electroproduction of Phi(1020) Mesons at High Q² with CLAS
… 1.6 ≤ Q² ≤ 3.8 GeV² and 2.0 ≤ W ≤ 3:0 GeV at CLAS. After successful signal identification, total and differential cross sections are measured and compared to the world data set. Comparisons are made to the predictions of the Jean-Marc Laget(JML) model based on Pomeron plus 2-gluon exchange. …
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Photoproduction and Radiative Decay of ηt Meson in CLAS at JLAB
… </em>have been measured using the CLAS detector at the Thomas Jefferson National Accelerator Facility using tagged incident photons in the center-of-mass energy range 1.96 GeV - 2.72 GeV. The measurements are performed on a liquid hydrogen target in the reaction <em>γp → …
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Measurments of Correlated Pair Momentum Distributions in 3He(e,e'pp)n With CLAS
<p>We have measured the <sup>3</sup>He(e,e'pp)n reaction at 2.2 and 4.4 GeV over a wide kinematic range. The kinetic energy distribution for ’fast’ nucleons (p > 250 MeV/c) peaks where two nucleons each have 20% or less and the third or ‘leading’ nucleon carries most of the transferred energy. …
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Advancing the Implementation of CLAS Standards to Support Health of South Asian Americans
… Linguistically Appropriate Services Standards (CLAS) framework for improving healthcare quality and advancing health equity for increasingly diverse communities, including South Asians. The purpose of this qualitative study is to understand how providers in California, a state with a large South …
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Spin Structure Functions of the Deuteron Measured with CLAS in and Above the Resonance Region
… with the CEBAF Large Acceptance Spectrometer (CLAS) to accumulate over 11 billion events. In this thesis, we present results for the spin structure function [special characters omitted](<em>x, Q</em><sup>2</sup>), as well as its first moment, [special characters omitted](<em>Q</em><sup>2</sup>) …
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Measurements of Correlated Pair Momentum Distributions in -3He(e,e',p,p)n with CLAS
<p>Nucleon-Nucleon (NN) Short Range Correlations (SRC) represent a valuable part of the nuclear wave function. Improved knowledge of SRC will give us a better understanding of nuclear matter and nuclear interactions in extreme conditions. A study of the effects of short-range correlations using the …
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Measurement of Pion-Pion Final State Interactions in η → π +π −γ with CLAS at Jefferson Lab
<p>Decays of pseudoscalar mesons proceed from the chiral anomaly, which arises from spontaneous chiral symmetry breaking. In the limit of massless quarks (chiral limit), the η → π +π −γ the decay width is determined solely by the box anomaly term in the Wess Zumino Witten Lagrangian. Since the …
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Photoproduction of π0 on Hydrogen With CLAS From 1.1 GeV - 5.45 GeV Using e+e –γ Decay
… of the π<sup>0</sup> meson was studied using the CLAS detector at the Thomas Jefferson National Accelerator Facility using tagged incident photon energies spanning the range <em>E</em><sub>γ</sub> = 1.1 GeV - 5.45 GeV. The measurement is performed on a liquid hydrogen target in the reaction …
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The effect of CLAs on the expression of PKC isoforms and cell viability in breast cancer cell lines.
… cancer cell lines. Conjugated linoleic acids(CLAs) are naturally occurring positional and geometric isomers of the fatty acid linoleic acid (LA). CLAs have been shown to reduce growth and increase apoptosis in breast cancer cells, and to alter their PKC expression both in animal models and in …
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Direct Measurements of Two Photon Exchange on Lepton-Proton Elastic Scattering Using Simultaneous Electron-Positron Beams in CLAS
… separation measurement. The Jefferson Lab CLAS TPE experiment determined the TPE contribution by measuring the ratio of positron-proton to electron-proton elastic scattering cross sections. The primary electron beam was used to create an intense bremsstrahlung photon beam. Some of the …
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Photoproduction of K<sup>*+</sup>¿¿/¿¿<sup>0</sup> and K<sup>0</sup>¿¿<sup>+</sup> from the Proton Using CLAS at Jefferson Lab
… + p → K<sup>*+</sup> + ¿¿<sup>0</sup> using the CLAS g11a data collected at experimental Hall-B, Jefferson Lab. These measurements are the world’s first high statistics measurements of K<sup>*+</sup>¿¿ and K<sup>*+</sup>¿¿<sup>0</sup> photoproduction. The cross section covers the incident photon …
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Beyond the Born Approximation: A Precise Comparison of e+p and e-p Elastic Scattering in the CEBAF Large Acceptance Spectrometer (CLAS)
… using the CEBAF large acceptance spectrometer (CLAS). Due to the luminosity constraint our kinematic coverage is limited to low <em>Q</em>² and high ϵ (longitudinal polarization of the virtual photon). We continued our background study through GEANT4 simulation developed for the test run design …
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Exclusive π- Electro-Production From the Neutron in the Resonance Region
… one of the CEBAF Large Acceptance Spectrometer (CLAS) collaboration experiments, <em>Barely off-shell Nuclear Structure (BoNuS)</em>, in Hall-B at Jefferson Lab. We have constructed a radial time projection chamber (RTPC) based on the gaseous electron multiplier (GEM) technology to detect low …
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Therapist Orientation and Circularity-Linearity of Causality, Responsibility, Intentionality, and Blame for Clinical Problems
… the Circularity-Linearity Attribution Scale (CLAS). Respondents' judgments about the sufficiency of a single cause for the problem, circular conceptualization of the problem, and linear conceptualization of the presented problems were also solicited. Responses were compared for two problems, …
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Photoproduction of the Λ*(1520 Hyperon off Protons and Neutrons In Deuterium
… neutrons in deuterium has been studied using the CLAS eg3 run data. The reactions are γ d → K<sup>+</sup> Λ<sup>*</sup> (n) and γ d → K<sup>0</sup> Λ<sup>*</sup> (p). Preliminary Λ<sup>*</sup>(1520) cross sections and decay angle distributions are extracted in the photon energy region 1.75 GeV < …
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Study of the Two Pion Photoproduction On Deuterium
… Us- ing the CEBAF Large Acceptance Spectrometer (CLAS), the hadronic products are detected in coincidence with the incident scattered photon on a deuterium target. This makes it possible to measure the single differential cross sections and the de- cay angular distributions for the production of …
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Search for the onset of color transparency through neutral rho meson electroproduction on nuclei
… Transparency in rho0 electroproduction with the CLAS detector at Thomas Jefferson Laboratory. This experiment used two different targets simultaneously to reduce the systematic error and achieve a more precise measurement.The Nuclear Transparency was measured as a function of Q2 and Coherence …
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A survey of beam asymmetries in semi-exclusive electron scattering on helium-4 and carbon-12
… with the CEBAF Large Acceptance Spectrometer (CLAS) detector located in Hall B at the Jefferson Laboratory, VA. The measured asymmetries compare well with the theoretical predictions.</p>
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Beam spin asymmetry measurements in deeply virtual Compton scattering
… Deeply Virtual Compton Scattering (DVCS) using CLAS detector at Jefferson Lab and longitudinally polarized electron beam with 4.8 GeV energy. This asymmetry is directly proportional to the imaginary part of the scattering amplitude, which relates it to the Generalized Parton distribution …
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Magnetic Field Shielding For the Forward Time of Flight Upgrade At Jefferson National Lab
… Facility (CEBAF) Large Acceptance Spectrometer (CLAS). These detectors must be properly shielded from magnetic fields used in the manipulation of the particle trajectories during experiments. Dr. Gothe's nuclear physics group has been experimenting with various types of magnetic shielding methods …
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