PHOTOPRODUCTION OF $pi$$sup 0$ MESONS FROM HYDROGEN IN THE REGION 900 to 1200 MEV

Journal Article · Mon Aug 15 04:00:00 EDT 1960 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.119.1381· OSTI ID:4156745

Jackson, H E; DeWire, J W; Littauer, R M

The reaction gamma + p yields pi /sup 0/ + p was studied in three adjacent 100-Mev energy intervals between 900 and 1200 Mev and at pion center-of- mass angles of 47 deg . 90 deg . and 125 deg . The reaction was observed as a coincidence between the recoil proton and one of the photons from the meson"s decay. The kinematics were determined by the energy of the incident photon and the angle of the recoil proton. The differential cross sections at the forward and backward angles showed pronounced maxima near 1050 Mev: whereas. the 90 deg cross sections decreased slowly with energy. The estimated total cross sections suggested a narrow maximum near 1050 Mev. These features were consistent with the previously proposed existence of a resonant state in the pion-nucleon system of total angular momentum 5/2. (auth)

• Research Organization: Cornell Univ., Ithaca, N.Y.
• NSA Number: NSA-14-023532
• OSTI ID: 4156745
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 119; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
COINCIDENCE METHODS
CROSS SECTIONS
DECAY
ENERGY
GEV RANGE
HYDROGEN
INTERACTIONS
MOMENTUM
PHOTONS
PHOTOPRODUCTION
PHYSICS
PIONS
PROTONS
RECOILS
RESONANCE