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Photoproduction of the rho(0) meson on the proton at large momentum transfer.
- Source :
-
Physical review letters [Phys Rev Lett] 2001 Oct 22; Vol. 87 (17), pp. 172002. Date of Electronic Publication: 2001 Oct 08. - Publication Year :
- 2001
-
Abstract
- The differential cross section, d sigma/dt, for rho(0) meson photoproduction on the proton above the resonance region was measured up to a momentum transfer -t = 5 GeV2 using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The rho(0) channel was extracted from the measured two charged-pion cross sections by fitting the pi(+)pi(-) and p pi(+) invariant masses. The low momentum transfer region shows the typical diffractive pattern expected from Reggeon exchange. The flatter behavior at large -t cannot be explained solely in terms of QCD-inspired two-gluon exchange models. The data indicate that other processes, like quark interchange, are important to fully describe rho photoproduction.
Details
- Language :
- English
- ISSN :
- 0031-9007
- Volume :
- 87
- Issue :
- 17
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 11690264
- Full Text :
- https://doi.org/10.1103/PhysRevLett.87.172002