gamma. production in p sup 20 Ne and pN interactions at 300 GeV

Journal Article · Wed May 01 04:00:00 EDT 1991 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.43.2803· OSTI ID:5538769

Yuldashev, B S ^[1]; Aliev, S M; Alimov, M A; Artykov, K K; Edgorov, S O; Inogamov, S V; Khaneles, A V; Kosonowski, E A; Lutpullaev, S L; Rasulov, N; Rodionova, T P; Turdaliev, K T; Turumov, E; Yuldashev, A A ^[2]; Loveless, R J; Reeder, D D ^[3]

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1. Department of Physics, University of Washington, Seattle, Washington 98195 (USA)
2. The Physical Technical Institute, The Uzbek Academy of Sciences, Tashkent, 700084, (U.S.S.R.)
3. Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (USA)

Data on the multiplicity and inclusive spectra of {gamma} produced in inelastic {ital p} {sup 20}Ne and {ital pN} interactions at 300 GeV are presented. The {gamma} multiplicity for {ital p} {sup 20}Ne interactions is 11.43{plus minus}0.23, and the ratio of {l angle}{ital n}{sub {gamma}}{r angle} for {ital p} {sup 20}Ne and {ital pN} interactions is 1.48{plus minus}0.05. From an analysis of the effective-mass distributions, {l angle}{ital n}{sub {pi}}{sup 0}{r angle}=4.91{plus minus}0.52 and {l angle}{ital n}{sub {eta}}{sup 0}{r angle}=1.47{plus minus}0.33. In fact, {eta}{sup 0} production is much higher in {ital p} {sup 20}Ne interactions ({ital R}({eta}{sup 0}/{pi}{sup 0})=0.66{plus minus}0.12 for {ital n}{sub {ital p}}{ge}2) than in {ital pN} interactions ({ital R}({eta}{sup 0}/{pi}{sup 0}) =0.06{plus minus}0.04). No {eta}{prime}(958) signal is seen. Strong correlations between {l angle}{ital n}{sub {gamma}}{r angle} and {ital n}{sub {ital p}}, the number of secondary protons, are observed, primarily from the central and target fragmentation regions. Inclusive {ital y}{sup *} and {ital p}{sub {perpendicular}} spectra are analyzed and evidence for low-energy cascading and rescattering of fast particles in the projectile fragmentation region is discussed. The data are compared to the predictions of the additive quark model, the Lund model, and the dual parton model.

• OSTI ID: 5538769
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 43:9; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
645204 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
BOSONS
BUBBLE CHAMBERS
COMPOSITE MODELS
DATA
EFFECTIVE MASS
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FRAGMENTATION
GAMMA SPECTRA
GAS TRACK DETECTORS
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
INCLUSIVE INTERACTIONS
INFORMATION
INTERACTIONS
ISOTOPES
LIE GROUPS
LIGHT NUCLEI
LINEAR MOMENTUM
MASS
MASS SPECTRA
MASSLESS PARTICLES
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MONTE CARLO METHOD
MULTIPLICITY
NEON 20
NEON ISOTOPES
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTON MODEL
PHOTONS
PROTON-NUCLEON INTERACTIONS
QUARK MODEL
RADIATION DETECTORS
RESCATTERING
SCATTERING
SPECTRA
STABLE ISOTOPES
SU GROUPS
SU-3 GROUPS
SYMMETRY GROUPS
TRANSVERSE MOMENTUM