Exclusive ρ Production by Virtual Photons

The cross section for production of rho/sup 0/ mesons has been measured in the reaction e + p ..-->.. e + p + ..pi../sup +/ + ..pi../sup -/. The cross section is presented as a function of W, the c.m. energy of the virtual-photon-proton system, and -Q/sup 2/, the square of the virtual-photon mass...

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Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1979-01, Vol.42 (4), p.208-211
Hauptverfasser:	Ahrens, L. A., Berkelman, K., Cassel, D. G., Day, C. T., Gibbard, B. G., Harding, D. J., Hartill, D. L., Humphrey, J. W., Killian, T. J., Klinger, J. S., Linnemann, J. T., Treadwell, E. A., White, D. H.
Format:	Artikel
Sprache:	eng
Schlagworte:	645101 - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties ANGULAR DISTRIBUTION BOSONS CROSS SECTIONS DATA DATA FORMS DISTRIBUTION ELECTRON-NUCLEON INTERACTIONS ELECTRON-PROTON INTERACTIONS ELEMENTARY PARTICLES ENERGY RANGE EXCLUSIVE INTERACTIONS EXPERIMENTAL DATA GEV RANGE GEV RANGE 10-100 GRAPHS HADRONS INFORMATION INTERACTIONS LEPTON-BARYON INTERACTIONS LEPTON-HADRON INTERACTIONS LEPTON-NUCLEON INTERACTIONS MASSLESS PARTICLES MATHEMATICAL MODELS MEASURING INSTRUMENTS MESON RESONANCES MESONS MULTIWIRE PROPORTIONAL CHAMBERS NUMERICAL DATA PARTICLE INTERACTIONS PARTICLE MODELS PARTICLE PRODUCTION PHOTONS PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PIONS PIONS MINUS PIONS PLUS PROPORTIONAL COUNTERS PSEUDOSCALAR MESONS RADIATION DETECTORS RESONANCE PARTICLES RHO-765 RESONANCES SCINTILLATION COUNTERS VECTOR DOMINANCE MODEL VECTOR MESONS VIRTUAL PARTICLES
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Beschreibung
Zusammenfassung:	The cross section for production of rho/sup 0/ mesons has been measured in the reaction e + p ..-->.. e + p + ..pi../sup +/ + ..pi../sup -/. The cross section is presented as a function of W, the c.m. energy of the virtual-photon-proton system, and -Q/sup 2/, the square of the virtual-photon mass. The vector-dominance model is not able to describe the dependence of the cross section on the parameters Q/sup 2/ and W. The slope parameter B describing the scattering of the proton exhibits a significant variation with Q/sup 2/.
ISSN:	0031-9007
DOI:	10.1103/PhysRevLett.42.208