Study of quark flavor-dependence in exclusive reactions at large momentum transfers

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6893613

Carroll, A S; Appel, R; Barton, D S; Bunce, G; Kmit, M; Makdisi, Y I; Baller, B R; Blazey, G C; Courant, H; Fang, G

The measurement of exclusive reactions at large momentum transfers provides an important testing ground for models of hard quark-quark scattering. We have measured cross sections or set upper limits for 12 meson-bryon (..pi../sup +-/p ..-->.. p..pi../sup +-/, p/rho//sup +-/, ..pi../sup +/..delta../sup +-/, K/sup +/..sigma../sup +-/, ..pi../sup /minus//p ..-->.. ..lambda../sup 0//..sigma../sup 0/K/sup 0/, K/sup +-/p ..-->.. pK/sup +-/) and 2 baryon-baryon (p/sup +-/p ..-->.. pp/sup /plus minus/) reactions near 90/degree/ C.M. by studying the flavor-dependence of these 2 exclusive reactions at t = -9(GeV/c)/sup 2/, we have been able to demonstrate in a perturbative QCD picture that the quark-interchange mechanism is dominant over gluon exchange and quark-antiquark annihilation. We will also present preliminary results on many of these reactions at t = -5(GeV/c)/sup 2/ with better resolution and statistical precision. 145 refs., 3 figs.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6893613
• Report Number(s): BNL-41369; CONF-880867-1; ON: DE88012139
• Country of Publication: United States
• Language: English

Related Subjects

645100* -- High Energy Physics-- Particle Interactions & Properties-Experimental
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPOSITE MODELS
CROSS SECTIONS
DISTRIBUTION
ELASTIC SCATTERING
ELEMENTARY PARTICLES
EXCLUSIVE INTERACTIONS
FLAVOR MODEL
INTERACTIONS
MASS DISTRIBUTION
MATHEMATICAL MODELS
MOMENTUM TRANSFER
PARTICLE INTERACTIONS
PARTICLE MODELS
POSTULATED PARTICLES
QUARK MODEL
QUARK-QUARK INTERACTIONS
QUARKS
SCATTERING
SPATIAL DISTRIBUTION