Correlations between high transverse momentum hadrons in. pi. /sup + -/p, K/sup -/p and pp collisions at 200 GeV/c

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5383109

Stanek, R W

This thesis presents a study of the quantum number correlations between secondary hadrons produced in a high transverse momentum reaction involving proton and meson beams incident on hydrogen at 200 GeV/c. Events with a single trigger particle having p/sub T/ in the range between 1.5 GeV/c and 4.5 GeV/c and produced between 67/sup 0/ approx. < theta* approx. < 104/sup 0/ are investigated using information from a multiparticle spectrometer at Fermilab. These trigger particles are identified as either a ..pi../sup + -/, K/sup + -/ or p/sup + -/. Ratios of the cross sections for producing these various triggers are found and compared to several hard scattering models. We also look in a +-45/sup 0/ azimuthal wedge 180/sup 0/ opposite the trigger particle and study the ratio of relatively fast positive hadrons to negative hadrons for different trigger types. For various triggers, h and h', excellent agreement with the Chicago-Princeton data for pp collisions is found in the trigger production ratios. We present data her for the first time for ..pi../sup + -/ and K/sup -/ induced reactions. Predictions from a CIM - QF parameterization by Chase and Stirling and from QCD are shown to agree reasonably well with all the proton induced ratios within our p/sub T/ region. The same is true for the ..pi../sup -/ induced ratios but Chase and Stirling fail to explain the ..pi../sup +/ induced ratios. On the away side, we calculate R/sub a/(h) which is the ratio of positive to negative hadrons produced in the reaction ap ..-->.. hX. The excess of positive hadrons opposite a K/sup -/ or anti p trigger in pp collisions reported by the British-French-Scandinavian group at the ISR is not seen. We do see, however, a charge dependent effect for all beams - R(h/sup -/) > R(h/sup +/). In agreement with QCD, R/sub a/(h) is not strongly dependent on particle types h having identical charge. We construct naive models in CIM and QCD to predict the away ratios for particles with x/sub e/ greater than or equal to 0.4.

• Research Organization: Illinois Univ., Chicago (USA)
• OSTI ID: 5383109
• Country of Publication: United States
• Language: English

Related Subjects

645103 -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Strong Interactions &amp; Baryon &amp; Meson Properties
645104* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON-BARYON INTERACTIONS
CIM MODEL
COMPOSITE MODELS
CORRELATIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMILAB ACCELERATOR
FIELD THEORIES
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
KAON MINUS-PROTON INTERACTIONS
KAON-NUCLEON INTERACTIONS
KAON-PROTON INTERACTIONS
MATHEMATICAL MODELS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PION PLUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUANTUM NUMBERS
SYNCHROTRONS