High energy photoproduction of the rho and rho' vector mesons. [R] [electronic resource].
- Published
- Urbana, Ill. : University of Illinois at Urbana-Champaign, 1977.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- Pages: 135 : digital, PDF file
- Additional Creators
- University of Illinois at Urbana-Champaign and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- In an experiment in the broad band photon beam at Fermilab diffractive production of 2..pi../sup + -/ and 4..pi../sup + -/ states from Be, Al, Cu, and Pb targets was observed. The 2..pi.. data is dominated by the rho(770) and the 4..pi../sup + -/ is dominated by the rho'(1500). The energy dependence of rho photoproduction from Be was measured, and no evidence seen for energy variation of the forward cross section in the range 30 to 160 GeV. The forward cross section is consistent with its average value dsigma/dt//sup 0/ = 3.42 +- 0.28 ..mu..b/GeV/sup 2/ over the entire range. For the rho' a mass of 1487 +- 20 MeV and a width of 675 +- 60 MeV were obtained. All quoted errors are statistical. A standard optical model analysis of the A dependence of the rho and rho' photoproduction yields the following results. f/sub rho'//sup 2//f/sub rho//sup 2/ = 3.7 +- 7; sigma/sub rho'//sigma/sub rho/ = 1.05 +- 0.18. Results for the photon coupling constants are in good agreement with GVMD and the e/sup +/e- storage ring results. The approximate equality of the rho--nucleon and rho'--nucleon total cross sections is inconsistent with the diagonal version of GVMD and provides strong motivation for including transitions between different vector mesons in GVMD. 50 references.
- Report Numbers
- E 1.99:coo-1195-412
coo-1195-412 - Subject(s)
- Other Subject(s)
- Aluminium
- Photonuclear Reactions
- Beryllium
- Copper
- Lead
- Rho-1500 Resonances
- Hadronic Particle Decay
- Mass
- Particle Widths
- Rho-765 Resonances
- Coupling Constants
- Cross Sections
- Energy Dependence
- Photons
- Total Cross Sections
- Vector Mesons
- Alkaline Earth Metals
- Bosons
- Decay
- Elementary Particles
- Elements
- Hadrons
- Massless Particles
- Meson Resonances
- Mesons
- Metals
- Nuclear Reactions
- Particle Decay
- Particle Properties
- Resonance Particles
- Transition Elements
- Note
- Published through SciTech Connect.
01/01/1977.
"coo-1195-412"
Bronstein, J.M. - Funding Information
- EY-76-C-02-1195
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