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Your search keyword '"Y. Roblin"' showing total 5 results
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5 results on '"Y. Roblin"'

1. Virtual compton scattering under π0 threshold at Q2=0.33 GeV2. Preliminary results

Author

P. Bartsch, J.E. Ducret, I. Ewald, Ch. Hyde-Wright, P. Vernin, G. Quemener, R. Geiges, R. Van de Vyver, G. Tamas, Marc Vanderhaeghen, A. Wagner, P. Merle, N. d'Hose, O. Ravel, R. Edelhoff, P.Y. Bertin, J. Van de Wiele, M. Kahrau, Vincent Breton, J.M. Friedrich, J. Martino, J. Roche, H. Kramer, Th. Gousset, E. A. J. M. Offermann, W.U. Boeglin, D. Lhuillier, G. Rosner, T. Caprano, A. Liesenfeld, P.A.M. Guichon, P. Sauer, S. Derber, N. Degrande, M. O. Distler, R. Böhm, K. Merle, H. Holvoet, P. Jennewein, V. Kunde, Y. Roblin, J. Berthot, G. De Meyer, C. Marchand, S. Kerhoas, D. Marchand, J. Y. Mougey, B. Lannoy, Th. Pospischil, H. Schmieden, Michael Tytgat, Harald Merkel, H. Fonvieille, Th. Walcher, L. Van Hoorebeke, S. Schardt, Dirk Ryckbosch, K. W. Krygier, R. Neuhausen, S. Wolf, and M. Korn

Subjects
Physics, Massless particle, Nuclear reaction, Elastic scattering, Nuclear physics, Nuclear and High Energy Physics, Photon, Scattering, Momentum transfer, Compton scattering, Virtual particle, Atomic physics, Nuclear Experiment
Abstract

We have measured the absolute unpolarized cross sections for photon electro-production off the proton ep → epγ with the Three-Spectrometer-Setup at MAMI at a momentum transfer q=600 MeV/c and a virtual photon polarization ɛ=0.62. The momentum q ′ of the outgoing real photon range from 33 to 111 MeV/c. We extracted two combinations of the recently introduced generalized polarizabilities [1,2].

Published
1999
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2. Measurements of R=σL/σT for 0.03<x<0.1 and fit to world data

Author

P. Raines, Ingo Sick, S.St. Lorant, D. Kawall, H. Borel, H. Tang, C. Y. Prescott, J. M. Bauer, H. R. Band, R. G. Arnold, F. S. Dietrich, L. M. Stuart, T. Maruyama, Ch. Hyde-Wright, D. Walz, J. L. White, J. S. McCarthy, P. E. Bosted, G. Court, T. Averett, Vincent Breton, P. Grenier, B. Raue, Kevin P. Coulter, S. Hoibraten, Pascal Steiner, R. Erbacher, F. Staley, D. Reyna, O. Rondon, P.L. Anthony, K. A. Griffioen, A. Feltham, E. W. Hughes, D. Crabb, J. Button-Shafer, R. Prepost, S. E. Rock, Timothy Chupp, A. Rijllart, J. Gomez, Timothy B. Smith, Y. Terrien, J. A. Dunne, L. C. Smith, K. Witte, T. L. Usher, W. Meyer, C. C. Young, J. Fellbaum, J. R. Johnson, D. Zimmermann, Avraham Klein, J. Morgenstern, M. Kuriki, Y. Roblin, Donal Day, Z. E. Meziani, F. Suekane, J. P. Chen, H. Dutz, R. C. Minehart, B. Zihlmann, Emil Frlez, B. Youngman, Koji Abe, R. Antonov, R. M. Lombard-Nelsen, H. Fonvieille, L. S. Rochester, R. A. Lindgren, G. G. Petratos, R. Gearhart, J. Marroncle, F.R. Wesselmann, John C. Mitchell, H. Yuta, G. H. Zapalac, R. Pitthan, J. Clendenin, T. J. Liu, Dinko Pocanic, S. E. Kuhn, Z. M. Szalata, T. Akagi, M. Spengos, X.K. Maruyama, D. Garvey, C. Comptour, and M. Daoudi

Subjects
Physics, Nuclear and High Energy Physics, Cross section.transverse, 010308 nuclear & particles physics, Scattering, chemistry.chemical_element, Electron, 01 natural sciences, Nuclear physics, Cross section (physics), chemistry, 0103 physical sciences, 010306 general physics, Carbon
Abstract

Measurements were made at SLAC of the cross section for scattering 29 GeV electrons from carbon at a laboratory angle of 4.5°, corresponding to 0.03

Published
1999
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3. Measurements of the Q2-dependence of the proton and deuteron spin structure functions g1 and g1

Author

A. Rijllart, J. Marroncle, Z. M. Szalata, J. Clendenin, T. Akagi, P. Raines, H. Dutz, T. J. Liu, Dinko Pocanic, H. R. Band, M. Kuriki, J. P. Chen, John C. Mitchell, S. E. Kuhn, B. Youngman, R. Prepost, S.St. Lorant, D. Walz, G. Court, Ingo Sick, Timothy B. Smith, J. Gomez, X.K. Maruyama, D. Kawall, K. Witte, L. M. Stuart, T. Maruyama, P. E. Bosted, P.L. Anthony, J. Fellbaum, C. Comptour, M. Daoudi, C. E. Hyde-Wright, R. Pitthan, D. Garvey, C. Y. Prescott, W. Meyer, Avraham Klein, R. A. Lindgren, G. G. Petratos, M. Spengos, F. Staley, L.S. Rochester, C. C. Young, T. L. Usher, B. Raue, S. Hoibraten, R. C. Minehart, D. Zimmermann, Pascal Steiner, H. Yuta, P. Grenier, K. A. Griffioen, Timothy Chupp, L. C. Smith, F. Suekane, J. Morgenstern, J. R. Johnson, G. H. Zapalac, Donal Day, Y. Roblin, D. G. Crabb, H. Tang, J. Button-Shafer, Koji Abe, J. A. Dunne, H. Fonvieille, H. Borel, J. S. McCarthy, F. S. Dietrich, T. Averett, R. G. Arnold, R. Erbacher, Z. E. Meziani, D. Reyna, R. A. Gearhart, A. Feltham, E. W. Hughes, J. L. White, J. M. Bauer, Vincent Breton, Kevin P. Coulter, O. Rondon, S. E. Rock, Y. Terrien, B. Zihlmann, Emil Frlez, R. Antonov, and R. M. Lombard-Nelsen

Subjects
Nuclear physics, Physics, High Energy Physics - Experiment (hep-ex), Nuclear and High Energy Physics, Deuterium, Proton, FOS: Physical sciences, Spin structure, High Energy Physics - Experiment
Abstract

The ratio g1/F1 has been measured over the range 0.031 (GeV/c)2. A trend is observed for g1/F1 to decrease at lower Q2. Fits to world data with and without a possible Q2-dependence in g1/F1 are in agreement with the Bjorken sum rule, but Delta_q is substantially less than the quark-parton model expectation., Comment: 16 pages, format is postscript file, gzip-ed, uuencode-ed

Published
1995
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4. MEMUS – A large solid angle detector for ELFE

Author

A.V. Stavinsky, G. Audit, T. Pussieux, P HoffmannRothe, Y. Roblin, R. Frascaria, C. Cavata, Thierry Auger, G. Fournier, M. Morlet, A. Pastor, T. Russew, C. Marchand, J Vandewiele, A. Boudard, L. H. Rosier, A.V. Vlassov, H. Fonvieille, E.A. Doroshkevitch, E. Voutier, J. Marroncle, J. Berthot, Vincent Breton, F. Merchez, P.Y. Bertin, and P. Vernin

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Hydrogen, Spectrometer, Physics::Instrumentation and Detectors, business.industry, Detector, Solid angle, chemistry.chemical_element, Modular design, Nuclear physics, chemistry, High Energy Physics::Experiment, Nuclear Experiment, business, Nucleon, Instrumentation
Abstract

Multiparticle Electroproduction Modular Upgradable Spectrometer (MEMUS) is a large acceptance detector intended to run on the ELFE machine at a luminosity of 10 36 cm −2 s −1 per nucleon with a hydrogen target. The detector is designed to study reactions with multiparticle final states. We present a brief description of the overall detector design and of the ongoing research program on the determination of the adequate characteristics of the different detector components.

Published
1998
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5. Beam energy measurement at TJNAF at a level of ΔE/E=10−4 by determination of the p(e,e’p) kinematics on hydrogen

Author

O. Ravel, J. Berthot, S Kerhoas, D. Lambert, Y. Roblin, G. Savinel, M. Crouau, G. Fournier, P.Y. Bertin, J.C. Lugol, M. Brossard, F. Daudon, and J Maroncle

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Silicon, Hydrogen, Physics::Instrumentation and Detectors, Detector, chemistry.chemical_element, Kinematics, Electron, chemistry, Physics::Accelerator Physics, Atomic physics, Instrumentation, Beam energy, Beam (structure)
Abstract

A beam energy measurement based on p(e,e’p) elastic scattering kinematics is presented. It uses two determinations in coincidences, symmetrically about the beam of the (e,e’p) kinematics. The scattered electron angles and the recoil proton angles are measured in silicon strip detectors. The goal is to determine the beam energy between 0.5 and 6 GeV with an accuracy of Δ E / E =10 −4 .

Published
1998
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