Progress on Neutron-Target Multipoles above 1 GeV

Conference · Sat Dec 01 00:00:00 EST 2012 · EPJ Web of Conferences

DOI:https://doi.org/10.1051/epjconf/20123708005· OSTI ID:1069286

Strakovsky, I I; Gao, H; Briscoe, W J; Dutta, D; Kudryavtsev, A E; Mirazite, M; Paris, M; Rossi, P; Stepanyan, S; Tarasov, V E; Workman, R L

We report a new extraction of nucleon resonance couplings using π{sup -} photo-production cross sections on the neutron. The world database for the process γn → π{sup -}p above 1 GeV has quadrupled with the addition of new differential cross sections from the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab in Hall B. Differential cross sections from CLAS have been improved with a new final-state interaction determination using a diagrammatic technique taking into account the SAID phenomenological NN and πN final-state interaction amplitudes. Resonance couplings have been extracted and compared to previous determinations. With the addition of these new cross sections, significant changes are seen in the high-energy behavior of the SAID cross sections and amplitudes.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1069286
• Report Number(s): JLAB-PHY-12-1619; DOE/OR/23177-2519
• Journal Information: EPJ Web of Conferences, Vol. 37; Conference: MESON 2012, KRAKOW, POLAND, 31 May - 5 June 2012
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS