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Polarization effects in rho/sup 0/-meson production in antiproton-proton interactions at 22. 4, 12, and 5. 7 GeV/c

Journal Article · · Phys. Rev. Lett.; (United States)
; ; ; ; ; ; ; ; ;
The rho/sup 0/-meson spin alignment is studied in p-barp interactions at 22.4 and 12 GeV/c and in the reaction p-barp..-->..2..pi../sup +/2..pi../sup -/+neutrals at 5.7 GeV/c. An essential rho/sup 0/-meson spin alignment is observed. The values of the rho/sub 00//sup T/ element of the rho/sup 0/-meson spin-density matrix in the transversity frame are 0.56 +- 0.07, 0.53 +- 0.05, and 0.54 +- 0.04 for the above-mentioned interactions, respectively. An increase of rho/sub 00//sup T/ with rho/sup 0/ transverse momentum is obtained.
Research Organization:
Institute of High Energy Physics of the Academy of Sciences of the Kazakh Soviet Socialist Republic, Alma-Ata, Union of Soviet Socialist Republics; Joint Institute for Nuclear Research, Dubna, Union of Soviet Socialist Republics; Department of
OSTI ID:
5349666
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 55:6; ISSN PRLTA
Country of Publication:
United States
Language:
English

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Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
BARYON-BARYON INTERACTIONS
BOSONS
BUBBLE CHAMBERS
CROSS SECTIONS
DECAY
DISTRIBUTION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
GAS TRACK DETECTORS
GEV RANGE
GEV RANGE 01-10
GEV RANGE 10-100
HADRON-HADRON INTERACTIONS
HADRONS
HYDROGEN
INCLUSIVE INTERACTIONS
INTERACTIONS
LINEAR MOMENTUM
MASS SPECTRA
MEASURING INSTRUMENTS
MESON RESONANCES
MESONS
NONMETALS
NUCLEON-ANTINUCLEON INTERACTIONS
ORIENTATION
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PIONS
PIONS MINUS
PIONS PLUS
POLARIZED PRODUCTS
PROTON-ANTIPROTON INTERACTIONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
RESONANCE PARTICLES
SPECTRA
SPIN ORIENTATION
TRANSVERSE MOMENTUM