scholarly journals Analyzingη′photoproduction data on the proton at energies of 1.5–2.3 GeV

2006 ◽  
Vol 73 (4) ◽  
Author(s):  
K. Nakayama ◽  
H. Haberzettl
Keyword(s):  
Photoproduction Data

scholarly journals EXTRACTION OF RESONANCE PARAMETERS AND ROLE OF THE FINAL STATE INTERACTIONS

2014 ◽  
Vol 26 ◽  
pp. 1460082 ◽  
Author(s):  
IGOR I. STRAKOVSKY ◽  
WILLIAM J. BRISCOE ◽  
ALEXANDER E. KUDRYAVTSEV ◽  
VLADIMIR E. TARASOV
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Impulse Approximation ◽  
Pion Photoproduction ◽  
Final State ◽  
The World ◽  
Final State Interactions ◽  
Watson’S Theorem ◽  
Photoproduction Data

We present an overview of the SAID group effort to analyze new γn → π-p cross sections vs. the world database to get new multipoles and determine neutron electromagnetic couplings. The differential cross section for the processes γn → π-p was extracted from new measurements at CLAS and MAMI-B accounting for Fermi motion effects in the impulse approximation (IA) as well as NN- and πN-FSI effects beyond the IA. We evaluated results of several pion photoproduction analyses and compared πN PWA results as a constraint for analyses of pion photoproduction data (Watson's theorem).

THE SCIENCE OF CONFINEMENT AND THE GLUEX/HALL D PROJECT AT JEFFERSON LAB

2003 ◽  
Vol 18 (03) ◽  
pp. 397-404 ◽  
Author(s):  
Alex R. Dzierba
Keyword(s):  
Degrees Of Freedom ◽  
Meson Production ◽  
First Year ◽  
Jefferson Lab ◽  
Coherent Bremsstrahlung ◽  
Linearly Polarized ◽  
Quantitative Understanding ◽  
Current Maximum ◽  
Photo Production ◽  
Photoproduction Data

One of the outstanding and fundamental questions in physics is the quantitative understanding of the confinement of quarks and gluons in quantum chromodynamics (QCD). Confinement is a unique feature of QCD. Exotic hybrid mesons manifest gluonic degrees of freedom and their spectroscopy will provide the crucial data needed to test assumptions in lattice QCD and phenomenology leading to confinement. Photo-production is expected to be particularly effective in producing exotic hybrids but data using photon probes are sparse. At Jefferson Lab, plans are underway to use the coherent bremsstrahlung technique to produce a linearly polarized photon beam. A solenoid-based hermetic detector will be used to collected data on meson production and decays with statistics that will exceed the current photoproduction data in hand by several orders of magnitude after the first year of running. In order to reach the ideal photon energy of 9 GeV/c for this mapping of the exotic spectra, the energy of the Jefferson Lab electron accelerator, CEBAF, will be doubled from its current maximum of 6 GeV to 12 GeV. The physics and project are described.

Model dependence of single-energy fits to pion photoproduction data

2011 ◽  
Vol 47 (11) ◽  
Author(s):  
R. L. Workman ◽  
M. W. Paris ◽  
W. J. Briscoe ◽  
L. Tiator ◽  
S. Schumann ◽  
...  
Keyword(s):  
Pion Photoproduction ◽  
Model Dependence ◽  
Photoproduction Data

scholarly journals Unified Chew-Mandelstam SAID analysis of pion photoproduction data

2012 ◽  
Vol 86 (1) ◽  
Author(s):  
Ron L. Workman ◽  
Mark W. Paris ◽  
William J. Briscoe ◽  
Igor I. Strakovsky
Keyword(s):  
Pion Photoproduction ◽  
Photoproduction Data

MESON PHOTOPRODUCTION ON THE NEUTRON AT GRAAL

2007 ◽  
Vol 22 (02n03) ◽  
pp. 341-348 ◽  
Author(s):  
◽  
P. Levi Sandri ◽  
V. Bellini ◽  
J. P. Bocquet ◽  
L. Casano ◽  
...  
Keyword(s):  
Meson Photoproduction ◽  
Hydrogen Target ◽  
Preliminary Results ◽  
Free Neutron ◽  
Deuterium Target ◽  
Free Process ◽  
Photoproduction Data

Using a Deuterium target, the GRAAL experiment has collected meson photoproduction data. The data have been analysed in the quasi free regime. The results of the quasi free process on the proton reproduce quite well the results previously obtained with a Hydrogen target. The preliminary results on the quasi free neutron for π0 and η photoproduction are presented and discussed.

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