Near threshold electroproduction of the {omega} meson at Q{sup 2}{approx_equal}0.5 GeV{sup 2}

Journal Article · Wed Sep 01 00:00:00 EDT 2004 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.70.035203· OSTI ID:20695541

Ambrozewicz, P ^[1]; Mitchell, J; Dunne, J; Abbott, D J; Carlini, R; Ent, R; Mack, D J; Wood, S; Yan, C ^[2]; Markowitz, P ^[3]; Martoff, C J ^[1]; Reinhold, J; Zeidman, B; Arrington, J; Bailey, K; Cummings, W J; Gao, H; Geesaman, D F; Hansen, J -O; O'Neill, T G ^[4]

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1. Temple University, Philadelphia, Pennsylvania 19122 (United States)
2. Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)
3. Florida International University, Miami, Florida 33199 (United States)
4. Argonne National Laboratory, Argonne, Illinois 60439 (United States); and others

Electroproduction of the {omega} meson was investigated in the {sup 1}H(e,e{sup '}p){omega} reaction. The measurement was performed at a four-momentum transfer Q{sup 2}{approx_equal}0.5 GeV{sup 2}. Angular distributions of the virtual photon-proton center-of-momentum cross sections have been extracted over the full angular range. These distributions exhibit a strong enhancement over t-channel parity exchange processes in the backward direction. According to a newly developed electroproduction model, this enhancement provides significant evidence of resonance formation in the {gamma}*p{yields}{omega}p reaction channel.

• OSTI ID: 20695541
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 70, Issue 3; Other Information: DOI: 10.1103/PhysRevC.70.035203; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
CROSS SECTIONS
ELECTRON REACTIONS
ELECTRON-NUCLEON INTERACTIONS
ELECTROPRODUCTION
FOUR MOMENTUM TRANSFER
HYDROGEN 1 TARGET
OMEGA-782 MESONS
PARITY
PHOTONS
PROTONS
RESONANCE PARTICLES
T CHANNEL