Search

Your search keyword '"J. Hovdebo"' showing total 3 results
Start Over Author "J. Hovdebo" Topic 010306 general physics
3 results on '"J. Hovdebo"'

1. The (π+,pd) and (π+,dd) reactions on light nuclei at 100 and 165 MeV incident pion energies

Author

G. A. C. Jones, P. L. Walden, D. F. Ottewell, G. M. Huber, G. J. Lolos, S. I. H. Naqvi, Z. Papandreou, X. Aslanoglou, and J. Hovdebo

Subjects
Physics, Nuclear reactions6Li12Cπ+,&#xa0, Nuclear and High Energy Physics, pd)(π+,&#xa0, 010308 nuclear & particles physics, Nuclear Theory, Kinetic energy, 01 natural sciences, 7. Clean energy, Nuclear physics, Cross section (physics), deduced reaction mechanism features, Pion, Deuterium, measuredparticle spectracoincidencesσ(θ)total σ, Yield (chemistry), 0103 physical sciences, 2d)E=100, 165 MeV, Physics::Accelerator Physics, Neutron, Nuclear Experiment, 010306 general physics, Absorption (electromagnetic radiation), Comparison with model predictions, Beam (structure)
Abstract

The (π+,pd), and (π+,dd) reactions on 6Li and 12C targets were investigated with pions of 100 and 165 MeV kinetic energy. The experimental apparatus employed for this work is characterized by good energy resolution (

Published
2002
Full Text
View/download PDF

2. Polarization measurements in high-energy deuteron photodisintegration

Author

C. Jones, Haiyan Gao, D. Crovelli, J. Mitchell, C. F. Perdrisat, S. Malov, S. Frullani, K. McCormick, G. M. Huber, K. Wijesooriya, P. Bosted, P. Markowitz, E. Schulte, M. K. Jones, Ronald Ransome, T. Chang, Kevin Fissum, E. Chudakov, Seonho Choi, M. Epstein, Carolina Chang, M. Rvachev, V. Gorbenko, B. Fox, Z. Chai, Arijit Saha, K. Aniol, G. J. Kumbartzki, D. Meekins, N. Liyanage, James J. Kelly, F. Xiong, B. Wojtsekhowski, R. Roche, Wenhu Xu, Jun Chen, S. Glamazdin, Edgar E. Kooijman, E. J. Brash, A. J. Sarty, S. Churchwell, S. Strauch, O. Hansen, L. Todor, Daniel Simon, J. Gomez, J. Lerose, Charles Glashausser, E. R. Kinney, Ronald Gilman, J. Hovdebo, R. Pomatsalyuk, K. Benslama, Sonja Dieterich, Michael Kuss, M. Amarian, R. Suleiman, Andrei Afanasev, R. Michaels, Demetrius Margaziotis, R. J. Holt, Jian-Rong Gao, L. Bimbot, Dipangkar Dutta, M. Liang, J. Calarco, G. M. Urciuoli, C. W. de Jager, F. Garibaldi, V. Punjabi, Z. E. Meziani, X. Jiang, S. Dumalski, P. E. Ulmer, S. Becher, R. A. Lindgren, L. Morand, O. Gayou, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), HALL A, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear reaction, Elastic scattering, Physics, Photon, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, Perturbative QCD, Acceleratorfysik och instrumentering, Polarization (waves), Accelerator Physics and Instrumentation, 7. Clean energy, 01 natural sciences, Induced polarization, Nuclear physics, Photodisintegration, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment
Abstract

We present measurements of the recoil proton polarization for the d(gamma--,p--)n reaction at straight theta(c.m.) = 90 degrees for photon energies up to 2.4 GeV. These are the first data in this reaction for polarization transfer with circularly polarized photons. The induced polarization p(y) vanishes above 1 GeV, contrary to meson-baryon model expectations, in which resonances lead to large polarizations. However, the polarization transfer Cx does not vanish above 1 GeV, inconsistent with hadron helicity conservation. Thus, we show that the scaling behavior observed in the d(gamma,p)n cross sections is not a result of perturbative QCD. These data should provide important tests of new nonperturbative calculations in the intermediate energy regime.

Published
2001

3. Polarization measurements in neutral pion photoproduction

Author

M. Epstein, Olivier Gayou, Bogdan Wojtsekhowski, S. Choi, G. J. Kumbartzki, A. J. Sarty, S. Becher, K. Benslama, D. Meekins, C. Glashausser, F. Xiong, R. A. Lindgren, F. Garibaldi, E. Schulte, B. Fox, S. Dumalski, C. E. Jones, Haiyan Gao, R. Suleiman, Daniel Simon, M. Rvachev, Olfred Hansen, J. H. Mitchell, P. E. Ulmer, R. J. Holt, J. Calarco, L. Todor, V. A. Punjabi, James J. Kelly, Arijit Saha, Ronald Gilman, Jian-Ping Chen, K. A. Aniol, C. W. de Jager, P. Bosted, Z. E. Meziani, J. Gao, Sonja Dieterich, J. Hovdebo, S. Churchwell, R. Michaels, C. C. Chang, G. M. Urciuoli, Andrei Afanasev, L. Bimbot, G. M. Huber, W. Xu, X. Jiang, D. J. Margaziotis, L. Morand, R. Pomatsalyuk, C. F. Perdrisat, M. Liang, E. R. Kinney, J. LeRose, K. McCormick, A. Glamazdin, E. Chudakov, M. K. Jones, D. Crovelli, Z. Chai, T. Chang, M. Kuss, S. Malov, Kevin Fissum, K. Wijesooriya, Ronald Ransome, Nilanga Liyanage, E. J. Brash, J. Gomez, S. Strauch, V. Gorbenko, Dipangkar Dutta, P. Markowitz, Edgar E. Kooijman, M. Amarian, S. Frullani, R. Roche, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), HALL A, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, Photon, 010308 nuclear & particles physics, Hadron, Polarization (waves), 01 natural sciences, 7. Clean energy, Induced polarization, Helicity, Nuclear physics, Pion, Amplitude, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, 010306 general physics
Abstract

We present measurements of the recoil proton polarization for the ^1H(γ ,p )π^0 reaction for θ^π_(c.m.)=60°–135° and for photon energies up to 4.1 GeV. These are the first data in this reaction for polarization transfer with circularly polarized photons. Various theoretical models are compared with the results. No evidence for hadron helicity conservation is observed. Models that employ factorization are not favored. It appears from the strong angular dependence of the induced polarization at photon energies of 2.5 and 3.1 GeV that a relatively high spin resonance or background amplitude might exist in this energy region.

Catalog

Books, media, physical & digital resources
See catalog results