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Title: {eta}{sup '} Photoproduction on the Proton for Photon Energies from 1.527 to 2.227 GeV

Abstract

Differential cross sections for the reaction {gamma}p{yields}{eta}{sup '}p have been measured with the CLAS spectrometer and a tagged photon beam with energies from 1.527 to 2.227 GeV. The results reported here possess much greater accuracy than previous measurements. Analyses of these data suggest for the first time the coupling of the {eta}{sup '}N channel to both the S{sub 11}(1535) and P{sub 11}(1710) resonances, known to couple strongly to the {eta}N channel in photoproduction on the proton, and the importance of J=3/2 resonances in the process.

Authors:
; ; ; ;  [1]; ; ; ; ; ; ; ;  [2];  [3]; ; ; ; ;  [4];  [5]
  1. Arizona State University, Tempe, Arizona 85287-1504 (United States)
  2. Rensselaer Polytechnic Institute, Troy, New York 12180-3590 (United States)
  3. Florida International University, Miami, Florida 33199 (United States)
  4. CEA-Saclay, Service de Physique Nucleaire, F91191 Gif-sur-Yvette (France)
  5. INFN, Sezione di Genova, 16146 Genova (Italy) (and others)
Publication Date:
OSTI Identifier:
20778607
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevLett.96.062001; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DIFFERENTIAL CROSS SECTIONS; ETA MESONS; GEV RANGE 01-10; PHOTON BEAMS; PHOTON-PROTON INTERACTIONS; PHOTONS; PHOTOPRODUCTION; PROTONS; RESONANCE PARTICLES; SPECTROMETERS

Citation Formats

Dugger, M., Ball, J.P., Collins, P., Pasyuk, E., Ritchie, B.G., Adams, G., Cummings, J.P., Empl, A., Hu, J., Klusman, M., Kubarovsky, V., Napolitano, J., Stoler, P., Ambrozewicz, P., Anciant, E., Audit, G., Garcon, M., Girod, F.X., Marchand, C., and Anghinolfi, M. {eta}{sup '} Photoproduction on the Proton for Photon Energies from 1.527 to 2.227 GeV. United States: N. p., 2006. Web. doi:10.1103/PHYSREVLETT.96.0.
Dugger, M., Ball, J.P., Collins, P., Pasyuk, E., Ritchie, B.G., Adams, G., Cummings, J.P., Empl, A., Hu, J., Klusman, M., Kubarovsky, V., Napolitano, J., Stoler, P., Ambrozewicz, P., Anciant, E., Audit, G., Garcon, M., Girod, F.X., Marchand, C., & Anghinolfi, M. {eta}{sup '} Photoproduction on the Proton for Photon Energies from 1.527 to 2.227 GeV. United States. doi:10.1103/PHYSREVLETT.96.0.
Dugger, M., Ball, J.P., Collins, P., Pasyuk, E., Ritchie, B.G., Adams, G., Cummings, J.P., Empl, A., Hu, J., Klusman, M., Kubarovsky, V., Napolitano, J., Stoler, P., Ambrozewicz, P., Anciant, E., Audit, G., Garcon, M., Girod, F.X., Marchand, C., and Anghinolfi, M. Fri . "{eta}{sup '} Photoproduction on the Proton for Photon Energies from 1.527 to 2.227 GeV". United States. doi:10.1103/PHYSREVLETT.96.0.
@article{osti_20778607,
title = {{eta}{sup '} Photoproduction on the Proton for Photon Energies from 1.527 to 2.227 GeV},
author = {Dugger, M. and Ball, J.P. and Collins, P. and Pasyuk, E. and Ritchie, B.G. and Adams, G. and Cummings, J.P. and Empl, A. and Hu, J. and Klusman, M. and Kubarovsky, V. and Napolitano, J. and Stoler, P. and Ambrozewicz, P. and Anciant, E. and Audit, G. and Garcon, M. and Girod, F.X. and Marchand, C. and Anghinolfi, M.},
abstractNote = {Differential cross sections for the reaction {gamma}p{yields}{eta}{sup '}p have been measured with the CLAS spectrometer and a tagged photon beam with energies from 1.527 to 2.227 GeV. The results reported here possess much greater accuracy than previous measurements. Analyses of these data suggest for the first time the coupling of the {eta}{sup '}N channel to both the S{sub 11}(1535) and P{sub 11}(1710) resonances, known to couple strongly to the {eta}N channel in photoproduction on the proton, and the importance of J=3/2 resonances in the process.},
doi = {10.1103/PHYSREVLETT.96.0},
journal = {Physical Review Letters},
number = 6,
volume = 96,
place = {United States},
year = {Fri Feb 17 00:00:00 EST 2006},
month = {Fri Feb 17 00:00:00 EST 2006}
}
  • No abstract prepared.
  • Differential cross sections for the reaction gamma p {yields} eta-prime p have been measured with the CLAS spectrometer and a tagged photon beam with energies from 1.527 to 2.227 GeV. The results reported here possess much greater accuracy than previous measurements. Analyses of these data indicate for the first time the coupling of the eta prime N channel to both the S{sub 11}(1535) and P{sub 11}(1710) resonances, known to couple strongly to the eta N channel in photoproduction on the proton, and the importance of j=3/2 resonances in the process.
  • Differential cross sections for gamma p-->eta p have been measured with tagged real photons for incident photon energies from 0.75 to 1.95 GeV. Mesons were identified by missing mass reconstruction using kinematical information for protons scattered in the production process. The data provide the first extensive angular distribution measurements for the process above W = 1.75 GeV. Comparison with preliminary results from a constituent quark model support the suggestion that a third S11 resonance with mass ~1.8 GeV couples to the etaN channel.
  • Differential cross sections for the reaction {gamma}p{yields}p{pi}{sup 0} have been measured with the CEBAF Large Acceptance Spectrometer (CLAS) and a tagged photon beam with energies from 0.675 to 2.875 GeV. The results reported here possess greater accuracy in the absolute normalization than previous measurements. They disagree with recent CB-ELSA measurements for the process at forward scattering angles. Agreement with the SAID and MAID fits is found below 1 GeV. The present set of cross sections has been incorporated into the SAID database, and exploratory fits have been extended to 3 GeV. Resonance couplings have been extracted and compared to previousmore » determinations.« less
  • Differential cross sections for the reaction {gamma}p{yields}n{pi}{sup +} have been measured with the CEBAF Large Acceptance Spectrometer (CLAS) and a tagged photon beam with energies from 0.725 to 2.875 GeV. Where available, the results obtained here compare well with previously published results for the reaction. Agreement with the SAID and MAID analyses is found below 1 GeV. The present set of cross sections has been incorporated into the SAID database, and exploratory fits have been made up to 2.7 GeV. Resonance couplings have been extracted and compared to previous determinations. With the addition of these cross sections to the worldmore » data set, significant changes have occurred in the high-energy behavior of the SAID cross-section predictions and amplitudes.« less