Charged Pion Photoproduction And Scaling

Conference · Sat Sep 01 00:00:00 EDT 2007

OSTI ID:955803

Gao, Haiyan

The gamma-n -->pi- p and gamma-p --> pi+ n reactions are essential probes of the transition from meson-nucleon degrees of freedom to quark-gluon degrees of freedom in exclusive processes. The cross sections of these processes are also advantageous, for the investigation of oscillatory behavior around the quark counting rule prediction, since they decrease relatively slower with energy compared with other photon-induced processes. In this talk, we discuss recent results on the gamma-p --> pi+ n and gamma-n -->pi- p processes from Jefferson Lab experiment E94-104. We also discuss the CLAS g10 analysis on the gamma-n -->pi- p process.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-060R23177
• OSTI ID: 955803
• Report Number(s): JLAB-PHY-07-776; DOE/OR/23177-0532; TRN: US1004747
• Resource Relation: Conference: Invited Talk compiled for MENU2007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
DEGREES OF FREEDOM
PHOTOPRODUCTION
PIONS
QUARKS