Nonperturbative aspects of the quark-photon vertex [electronic resource].
- Published:
- Washington, D.C. : United States. Dept. of Energy, 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- 28 pages : digital, PDF file
- Additional Creators:
- University of Washington
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information - Access Online:
- www.osti.gov
- Summary:
- The electromagnetic interaction with quarks is investigated through a relativistic, electromagnetic gauge-invariant treatment. Gluon dressing of the quark-photon vertex and the quark self-energy functions is described by the inhomogeneous Bethe-Salpeter equation in the ladder approximation and the Schwinger-Dyson equation in the rainbow approximation respectively. Results for the calculation of the quark-photon vertex are presented in both the time-like and space-like regions of photon momentum squared, however emphasis is placed on the space-like region relevant to electron scattering. The treatment presented here simultaneously addresses the role of dynamically generated q{bar q} vector bound states and the approach to asymptotic behavior. The resulting description is therefore applicable over the entire range of momentum transfers available in electron scattering experiments. Input parameters are limited to the model gluon two-point function which is chosen to reflect confinement and asymptotic freedom and are largely constrained by the obtained bound-state spectrum.
- Subject(s):
- Note:
- Published through SciTech Connect.
06/01/1994.
"doe/er/40561--131"
"DE94012846"
"INT94-00-52"
"35KB01000/KB0300000"
Frank, M.R. - Type of Report and Period Covered Note:
- Topical; 12/31/1994 - 12/31/1994
- Funding Information:
- FG06-90ER40561
View MARC record | catkey: 14712539