Measurement of neutral meson and direct photon production at large transverse momentum

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5932779

Povlis, J D

Inclusive cross sections for ..pi../sup 0/ and eta production near 90/sup 0/ in the center of mass at transverse momenta (p/sub T/) between 2.1 and 5 GeV/c have been measured in 200 GeV/c ..pi../sup +/ and proton collisions with beryllium, carbon, and aluminum targets. These cross sections rise with increasing nucleon number (A) of the target nucleus as A/sup ..cap alpha../, with ..cap alpha.. > 1. The ratio of the ..pi../sup 0/ yields in pA ..pi../sup +/ collisions decreases with increasing p/sub T/. The inclusive production of direct photons has been measured for the same kinetmatic region in 200 GeV/c ..pi../sup +/ and proton collisions on a carbon target. A significant direct photon yield is observed for p/sub T/ > 2.5 GeV/c. The invariant cross section for direct photon production, when compared with measurements from the CERN intersecting storage rings, can be expressed in terms of the variable p/sub T/ and x/sub T/ for the center of mass energy range ..sqrt..s = 19.4-63 GeV, and the x/sub T/ range 0.2-0.5.

• Research Organization: Minnesota Univ., Minneapolis (USA)
• OSTI ID: 5932779
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
645104 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALKALINE EARTH METALS
ALUMINIUM
BARYON REACTIONS
BERYLLIUM
BOSONS
CARBON
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
ETA MESONS
EXPERIMENTAL DATA
GEV RANGE
GEV RANGE 100-1000
HADRON REACTIONS
HADRONS
INCLUSIVE INTERACTIONS
INFORMATION
INTERACTIONS
LINEAR MOMENTUM
MASS NUMBER
MASSLESS PARTICLES
MESON REACTIONS
MESONS
METALS
NONMETALS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTONS
PION PLUS REACTIONS
PION REACTIONS
PIONS
PIONS PLUS
PROTON REACTIONS
PSEUDOSCALAR MESONS
TRANSVERSE MOMENTUM