6533b858fe1ef96bd12b63f9
RESEARCH PRODUCT
Measurements of the antiproton-proton elastic cross section in the beam momentum range between 180 and 600 MeV/c
Ronald RansomeH. KneisK. DworschakTh. WalcherT.-a. ShibataS. MajewskiB. CujecM. TreichelS. PaulW. BrücknerH. DöbbelingMasaharu NomachiBogdan Povhsubject
PhysicsElastic scatteringNuclear and High Energy PhysicsProtonNuclear TheoryPhase (waves)Nuclear physicsMomentumCross section (physics)AmplitudeAntiprotonPhysics::Accelerator PhysicsAtomic physicsNuclear ExperimentParticle Physics - ExperimentBeam (structure)description
The differential cross section for antiproton-proton elastic scattering has been measured for the beam momenta between 180 and 600 MeV/c. The real-to-imaginary ratio of the forward elastic scattering amplitude is derived from the Coulomb-nuclear interference. The ratio is found to be close to zero between 180 and 500 MeV/c with a minimum ofρ=−0.14 at 260 MeV/c. This result is contrary to model predictions. The phase shifts for thes-,p- andd-waves are extracted. The partial wave compositions of the elastic and inelastic cross sections have been determined. A large contribution of thep-wave is identified in the antiproton-proton interactions at small momenta.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1991-09-01 | Zeitschrift für Physik A Hadrons and Nuclei |