1. Measurement of Spin Effects at 150 and 200 GeV/c for pp and π+p Elastic Scattering
- Author
-
A. Penzo, L. Lanceri, Franco Bradamante, A. Vascotto, G. Leder, Anna Teresa Meneguzzo, Antonio Villari, P. Schiavon, Ch. Gottfried, R. Frühwirth, M. Steuer, H. Stradner, F. Gasparini, M. Pernicka, G. Fidecaro, S. Nurushev, R. Birsa, W. Bartl, C. Voci, L. Piemontese, G. Neuhofer, Marcello Giorgi, P. Sartori, M. Posocco, M. Fidecaro, M. Regler, Ch. Poyer, V. Solovianov, and W. Majerotto
- Subjects
Diffraction ,Elastic scattering ,Physics ,Pion ,Momentum transfer ,High Energy Physics::Experiment ,Atomic physics ,Nuclear Experiment ,Polarization (waves) - Abstract
The elastic scattering of protons and pions on polarized protons has been measured at 150 and 200 GeV/c, in a momentum transfer region still dominated by diffraction. The pp cross-section (spin-averaged) develops a dip at |t| ≅ 1.5 GeV2 which becomes more important as the energy increases. The (negative) polarization, which steadily increases from zero at t = -0.4 GeV2, reaches 10–15%; in the dip region a zero-crossing to positive values seems to take place. The π+p polarization has a similar t-dependence, while the cross-section shows no dip structure.
- Published
- 1981