Spin-spin interactions in high-transverse momentum elastic p-p scattering

Journal Article · Mon Sep 19 04:00:00 EDT 1977 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.39.733· OSTI ID:7090709

O'Fallon, J R; Ratner, L G; Schultz, P F; Abe, K; Fernow, R C; Krisch, A D; Mulera, T A; Salthouse, A J; Sandler, B; Terwilliger, K M; Crabb, D G; Hansen, P H

We measured dsigma/dt for p + p ..-->.. p + p at 11.75 GeV/c using the zero-gradient synchrotron 70% polarized-proton beam and a 65% polarized-proton target. We obtained the spin-orbit asymmetry parameter A and the spin-spin correlation parameter C/sub n n/ out to P/sub transverse//sup 2/ = 4.2 (GeV/c)/sup 2/ . We found that A drops smoothly towards zero, but that C/sub n n/ increases abruptly near P/sub transverse//sup 2/ = 3.6 (GeV/c)/sup 2/, where the exp(-1.4P/sub transverse//sup 2/) component of elastic scattering becomes dominant. This suggests that large-P/sub transverse//sup 2/ ''hard'' elastic scattering may occur mostly when the two proton spins are parallel.

• Research Organization: Argonne Universities Association and Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 7090709
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 39:12; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANGULAR MOMENTUM
ASYMMETRY
BARYON-BARYON INTERACTIONS
BEAMS
CORRELATIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ENERGY RANGE
GEV RANGE
GEV RANGE 10-100
HADRON-HADRON INTERACTIONS
INTERACTIONS
LINEAR MOMENTUM
NUCLEON-NUCLEON INTERACTIONS
ORIENTATION
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
POLARIZED BEAMS
POLARIZED TARGETS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
SCATTERING
SPIN
SPIN ORIENTATION
SYNCHROTRONS
TARGETS
TRANSVERSE MOMENTUM
ZGS