Measurement of the analysing power in proton-proton elastic scattering at small angles

Abstract

The proton analysing power in $\vec{p}p$ elastic scattering has been measured at small angles at COSY-ANKE at 796 MeV and five other beam energies between 1.6 and 2.4 GeV using a polarised proton beam. The asymmetries obtained by detecting the fast proton in the ANKE forward detector or the slow recoil proton in a silicon tracking telescope are completely consistent. Although the analysing power results agree well with the many published data at 796 MeV, and also with the most recent partial wave solution at this energy, the ANKE data at the higher energies lie well above the predictions of this solution at small angles. An updated phase shift analysis that uses the ANKE results together with the World data leads to a much better description of these new measurements.

arXiv comment5 pages, 3 figures

References in corpus (7)

• Updated analysis of NN elastic scattering to 3 GeV
• Nucleon-nucleon elastic scattering to 3 GeV
• Determination of Deuteron Beam Polarizations at COSY
• Excitation Functions of the Analyzing Power in Elastic Proton-Proton Scattering from 0.45 to 2.5 GeV
• Measurement of Spin Correlation Parameters A${}_{NN}$, A${}_{SS}$, and A_$SL$ at 2.1 GeV in Proton-Proton Elastic Scattering
• Excitation functions of spin correlation parameters A_{NN}, A_{SS}, and A_{SL} in elastic pp scattering between 0.45 and 2.5 GeV
• Measurement of the Analyzing Power in $\vec{p}d\to (pp)n$ \\with a Fast Forward ${}^1{S}_0$--Diproton

Cited by in corpus (8)

• Partial-Wave Analysis of Nucleon-Nucleon Elastic Scattering Data
• Theoretical Study of Spin Observables in $pd$ Elastic Scattering at Energies $T_p=800-1000$ MeV
• Extraction of Azimuthal Asymmetries using Optimal Observables
• Measurement of the absolute differential cross section of proton-proton elastic scattering at small angles
• Null-test signal for T-invariance violation in $pd$ scattering
• The legacy of the experimental hadron physics programme at COSY
• Experimental and theoretical study of deuteron-proton elastic scattering for proton kinetic energies between $T_p=882.2\text{MeV}$ and $T_p=918.3\text{MeV}$
• Measurement of the analyzing powers in pd elastic and pn quasi-elastic scattering at small angles