Charged Pion Photoproduction

Conference · Tue Dec 01 04:00:00 EST 2009 · AIP Conf.Proc.

DOI:https://doi.org/10.1063/1.3293942· OSTI ID:981269

Haiyan Gao, Wei Chen

We extracted the differential cross section for the gn --> pi-p process from a deuterium target using the CLAS detector at Jefferson Lab in Hall B for photon energies between 1.0 and 3.5 GeV and pion center-of-mass (c.m.) angles (theta c.m.) between 50 deg. and 115 deg. We confirm a previous indication of a broad enhancement around a c.m. energy (sqrt s) of 2.1 GeV at theta c.m. =90 deg. in the scaled differential cross section, s^7 ds/dt and a rapid fall-off in a center-of-mass energy region of about 400 MeV following the enhancement. Our data show an angular dependence of this enhancement as the suggested scaling region is approached for theta c.m. from 70 deg. to 10 deg.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 981269
• Report Number(s): JLAB-PHY-09-1026; DOE/OR/23177-0881; JLAB-E-94-104
• Conference Information: Journal Name: AIP Conf.Proc. Journal Volume: 1182
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
74 ATOMIC AND MOLECULAR PHYSICS
DATA
DEUTERIUM TARGET
DIFFERENTIAL CROSS SECTIONS
ENERGY
NUCLEAR PHYSICS
PARTICLES
PHOTONS
PHOTOPRODUCTION
PIONS
SCALING
YIELDS