pi. /sup -/p charge-exchange analyzing power from 547 to 687 MeV/c

Journal Article · Thu Dec 01 04:00:00 EST 1988 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.38.3365· OSTI ID:6647714

Wightman, J A; Eichon, A D; Kim, G J; Mokhtari, A; Nefkens, B M.K.; Briscoe, W J; Fitzgerald, D H; Sadler, M E

The ..pi../sup -/p charge-exchange analyzing power has been measured from 547 to 687 MeV/c in the center-of-mass angular range -0.9less than or equal toostheta-tilde/sub ..pi../less than or equal to.9 using a transversely polarized target. The recoil neutron was detected in coincidence with a photon from ..pi../sup 0/ decay. The results are compared with the three recent partial-wave analyses (PWA's); the VPI analysis is most consistent with our measured distributions except at 687 MeV/c where no PWA agrees with our data. The charge-exchange transversity cross sections are evaluated using the differential cross sections of Borcherding et al. These transversity cross sections are used in conjunction with earlier ..pi../sup +- /p data by our group to test the triangle inequalities which are a model-independent test of isospin invariance. Our data satisfy these inequalities everywhere; in contrast, Abaev et al. have reported a violation of more than 5 standard deviations at 685 MeV/c.

• Research Organization: Department of Physics, University of California, Los Angeles, California 90024
• OSTI ID: 6647714
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 38:11; ISSN PRVDA
• 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
ANALYZING POWER
ANGULAR DISTRIBUTION
BASIC INTERACTIONS
BOSONS
CENTER-OF-MASS SYSTEM
CHARGE-EXCHANGE INTERACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELASTIC SCATTERING
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
ISOSPIN
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
MEV RANGE
MEV RANGE 100-1000
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PION MINUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
PIONS
PIONS NEUTRAL
POLARIZED TARGETS
PSEUDOSCALAR MESONS
RECOILS
SCATTERING
STRONG INTERACTIONS
TARGETS