Observed differences in event structures of high-p/sub T/. pi. /sup 0/ and single photon events produced in pp collisions in the CERN ISR

Journal Article · Sun Feb 01 04:00:00 EST 1981 · AIP Conf. Proc.; (United States)

OSTI ID:6455272

The direct photon production in pp collisions for c.m. energies 31< or =root-bars< or =63 GeV and transverse momenta of up to 9 GeV/c were measured at the ISR using a segmented lead/liquid argon calorimeter. The observed ..gamma../..pi../sup 0/ ratio is found to be significantly larger than zero at 4 GeV/c in p/sub T/ increasing to 0.4 at 9 GeV/c. The average multiplicity on the trigger side for the single-photon events was found to be significantly lower than for ..pi../sup 0/ events. The correlations in ..delta..y and ..delta..o between the trigger particle and an additional particle are found to differ mainly at small ..delta..y and ..delta..o.

• OSTI ID: 6455272
• Report Number(s): CONF-800724-
• Journal Information: AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 68:1; ISSN APCPC
• 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
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
BARYON-BARYON INTERACTIONS
BOSONS
BREMSSTRAHLUNG
CERN ISR
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
FRAGMENTATION
GEV RANGE
GEV RANGE 01-10
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
JET MODEL
LINEAR MOMENTUM
MASSLESS PARTICLES
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESONS
MULTIPLICITY
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE STRUCTURE
PHOTONS
PIONS
PIONS NEUTRAL
PROPORTIONAL COUNTERS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
PSEUDOSCALAR MESONS
QUARK-QUARK INTERACTIONS
RADIATION DETECTORS
RADIATIONS
SHOWER COUNTERS
STORAGE RINGS
TRANSVERSE MOMENTUM