Regge signatures from CLASΛ(1520)photoproduction data at forward angles

En Wang; Ju-Jun Xie; Juan Nieves

doi:10.1103/physrevc.90.065203

EXTRACTION OF RESONANCE PARAMETERS AND ROLE OF THE FINAL STATE INTERACTIONS

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194514600829 ◽

2014 ◽

Vol 26 ◽

pp. 1460082 ◽

Cited By ~ 1

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).

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

International Journal of Modern Physics A ◽

10.1142/s0217751x03014319 ◽

2003 ◽

Vol 18 (03) ◽

pp. 397-404 ◽

Cited By ~ 2

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.

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