Spin-rotation parameters [ital A] and [ital R] for [pi][sup +][ital p] and [pi][sup [minus]][ital p] elastic scattering from 427 to 657 MeV/[ital c]

Journal Article · Sun Feb 28 23:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.1762· OSTI ID:6819770

Supek, I; Barlow, D B; Briscoe, W J; Davis, J F; Kim, G J; Lane, D W; Mokhtari, A; Nefkens, B M.K.; Pillai, C; Sadler, M E; Seftor, C J; Taragin, M F; Wightman, J A ^[1]

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1. Abilene Christian University, Abilene, Texas 79699 (United States) University of California, Los Angeles, California 90024 (United States) George Washington University, Washington, D.C. 20052 (United States) Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

The spin-rotation parameters [ital A] and [ital R] and the related spin-rotation angle [beta] have been measured for [pi][sup +][ital p] and [pi][sup [minus]][ital p] elastic scattering using protons polarized in the scattering plane. The pion-beam momenta are 427, 471, 547, 625, and 657 MeV/[ital c] and the angular range is [minus]0.9[le]cos[ital FTHETA][sub c.m.][le]0.3. The scattered pion and recoil proton were detected in coincidence, using a scintillator hodoscope for the pions, and the Large Acceptance Spectrometer combined with the JANUS polarimeter for the recoil protons. The results are compared with the four recent [pi][ital N] partial wave analyses (PWA's). Our data show that the major features of these PWA's are correct. The [ital A] and [ital R] measurements complete our program of pion-nucleon experiments, providing full data sets at three of the above beam momenta. Such sets can be used to test the constraints in the PWA's or to obtain a model-independent set of [pi][ital N] scattering amplitudes.

• OSTI ID: 6819770
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 47:5; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662340* -- Hadron Interactions-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BARYONS
COINCIDENCE METHODS
COINCIDENCE SPECTROMETRY
COUNTING TECHNIQUES
DISTRIBUTION
ELASTIC SCATTERING
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY RANGE
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MEV RANGE
MEV RANGE 100-1000
N BARYONS
N-1440 BARYONS
PARAMETRIC ANALYSIS
PARTIAL WAVES
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PION MINUS-PROTON INTERACTIONS
PION PLUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
POLARIZED TARGETS
RECOILS
SCATTERING
SCATTERING AMPLITUDES
SPIN
TARGETS