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Showing 1 to 20 of 62 for “"Hermes"”.
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The HERMES recoil photon detector and nuclear pt-broadening at HERMES.
Deze thesis gaat over de bouw en de test van de hermes recoil foton detector. Het tweede deel handelt aangaande verbreding van de transversale impuls van hadronen gevormd in een nucleaire omgeving ter vergelijking met diegene die gevormd worden aan een nuceon (proton of neutron). Dit verschaft …
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Measurement of the D*+- cross-section at HERMES
… GeV. The analysis is based on data collected by HERMES in 1997. From this result, the open charm photoproduction cross-section is determined for a photon energy of 15.5 GeV. The value for the cross-section is found to be in good agreement with the only other experimental result at similarly low …
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Exclusive pi0 production at HERMES: detection - simulation - analysis
The Hermes experiment was built to determine the spin structure of the proton. It is already known since a long time that the proton is built out of three quarks. However, experiments have shown that the quarks itself are responsible for only about 30 % of the proton spin. The remaining parts are …
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Deeply Virtual Compton Scattering off unpolarised deuterium at HERMES
The HERMES experiment was a forward angle spectrometer on the HERA storage ring at DESY, Hamburg, Germany. HERMES successfully increased understanding of the “spin puzzle”, the spin structure of the nucleon, by providing high precision measurements of ∆Σ in the Quark Parton Model, the fraction of …
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Extraktion der Polarisierten Quark-Verteilungen des Nukleons bei HERMES
… am Proton und <br>Deuteron anhand der vom HERMES--Experiment gesammelten Daten <br>der Jahre 1996-98 aus polarisierter tief-inelastischer Lepton-Nukleon-Streuung <br>extrahiert. Diese Asymmetrien dienten als Grundlage der Extraktion der polarisierten Quark-Verteilungen des Nukleons sowohl …
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A Measurement of Nucleon Quark Spin Distributions at HERMES
In the first part of this thesis an introduction to the theoretical and experimental considerations for this analysis is presented, followed by a description of the measurement of the above-mentioned asymmetries. Finally, the analysis concerning the conversion of these measured asymmetries into …
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A Measuremetn of Nucleon Quark Spin Distributions at HERMES
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2012-01-12T21:22:54Z No. of bitstreams: 1 2000_bains.pdf: 3640816 bytes, checksum: 50b242b0fae08cc7b4e97a277a2f5cf5 (MD5)
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Fragmentation and nucleon structure in semi-inclusive deep-inelastic scattering at the HERMES experiment
… were extracted from data collected by the HERMES experiment at the HERA storage ring using 27.6 GeV electron and positron beams on a hydrogen or deuterium gas target. These results for identified hadrons constitute the most precise measurement to date, and will significantly enhance our …
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Extraction of Polarised Quark Distributions of the Nucleon from Deep Inelastic Scattering at the HERMES Experiment
… polarised <br>positron-proton scattering in the HERMES experiment at DESY. <br> <br>The first part of this thesis describes the achievement and <br>measurement of longitudinal positron polarisation in the HERA <br>storage ring, using Compton scattering of polarised laser light. <br>Emphasis is …
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On Extracting Hadron Multiplicities and Unpolarized Nucleon Structure Ratios From SIDIS Data at the HERMES Experiment
… Q2 of 2.5 GeV2. This data was collected at the HERMES experiment located in the east hall of the HERA accelerator between the years 2000 and 2006. The hadron multiplicity from these scattering events is extracted for identified charged pions, kaons and protons from two different gaseous targets …
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A educação de Hermes e a disciplina de filosofia na política curricular brasileira pós-década de 1990
Resumo: A presente dissertação de mestrado sistematiza e problematiza o sentido e a função do ensino de Filosofia no contexto das políticas públicas educacionais a partir da publicação da LDBEN 9394/96. Identifica e analisa quais são as principais contradições existentes entre as intencionalidades …
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Measurement of the Transverse Spin Polarization of the Lambda in Quasi-Real Photoproduction and Electroproduction at HERMES
… statistical accuracy have been lacking. At the HERMES experiment, the polarization of the Lambda and Lambda have been measured in the inclusive, quasi-real photoproduction regime. A positive polarization with respect to the Lambda production plane has been observed for the Lambda. Also, …
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The Boer-Mulders and Cahn Effects: Azimuthal Modulations in the Spin-Independent Sidis Cross Section at Hermes
… presented and now is the primary method used at Hermes.
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The Boer-Mulders and Cahn effects: azimuthal modulations in the spin-independent SIDIS cross section at Hermes
… scattering cross section were measured at Hermes. These modulations are sensitive to the polarization and transverse motion of quarks within the nucleon. The Cahn effect, which contributes at subleading twist (twist-3) to cosφh and twist-4 to cos2φh, is sensitive to transverse motion of …
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Polarization, Motion, and Fragmentation: Exploring the Role of Quarks in the Nucleon Through Semi-Inclusive Longitudinal Spin Asymmetries at HERMES
… hydrogen and deuterium gas targets, taken by the HERMES collaboration at the DESY laboratory in Hamburg, Germany. Double-spin Born asymmetries are presented. Semi-inclusive (hadron-identified) asymmetries are binned in the parton momentum fraction (Bjorken-x), hadron energy fraction, z, and …
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Implementation of Hadamard Encoding and Reconstruction of MEGA-Edited Spectroscopy (HERMES) for quantification of ɣ-aminobutyric acid (GABA) and glutathione (GSH)
… and Reconstruction of MEGA-Edited Spectroscopy (HERMES) to simultaneously detect GABA and GSH, developed a novel postprocessing technique that simultaneously models the sum and various difference spectra, and evaluated the performance of the sequence and processing method both in phantoms and in …
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A measurement of the contribution of the gluon to the spin of the nucleon
… The experimental data was obtained using the HERMES instrument at the Deustches Elektronen-Synchroton (DESY) in Hamburg, Germany during the year 2000. The effort was motivated by an earlier observation at HERMES that not all of the spin could be attributed to the quarks making up the nucleon …
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