Measurement of proton proton elastic scattering in pure initial spin states at 11.75 GeV/ c

• Published in: Physics letters. B Vol. 63; no. 2; pp. 239 - 244
• Main Authors: Abe, K., Fernow, R.C., Mulera, T.A., Terwilliger, K.M., De Boer, W., Krisch, A.D., Miettinen, H.E., O'Fallon, J.R., Ratner, L.G.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.1976
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(76)90658-4

The elastic cross section for proton proton scattering at 11.75 GeV/ c was measured at the Argonne ZGS using a 50% polarized target. In the range p ⊥ 2=0.6 → 2.2 (GeV/ c) 2 we obtained precise measurements of dσ dt(ij) for the ⇈ ⇊, and ⇅ initial spin states perpendicular to the scattering plane. We confirmed that the asymmetry parameter, A, decreases with energy in the diffraction peak, but is approximately energy-independent at large p ⊥ 2. We found that the spin correlation parameter c nn acquires rather dramatic structure, and at large p ⊥ 2 seems to grow with energy.