Neutral-strange-particle production in p sup 20 Ne and pN interactions at 300 GeV

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

DOI:https://doi.org/10.1103/PhysRevD.43.2792· OSTI ID:5664807

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 multiplicity, correlations, and inclusive spectra of {ital K}{sub {ital S}}{sup 0} mesons and {Lambda}{sup 0} ({bar {Lambda}} {sup 0}) hyperons produced with {ital x}{sub {ital F}}{le}0 in inelastic {sup 20}Ne and {ital pN} interactions at 300 GeV are presented and compared. The inclusive cross sections for {ital p} {sup 20}Ne ({ital pN}) with {ital x}{sub {ital F}}{le}0 are 61.1{plus minus}2.8 mb (3.34{plus minus}0.64 mb) for {ital K}{sub {ital S}}{sup 0}, 40.8{plus minus}2.5 mb (1.89{plus minus}0.29 mb) for {Lambda}{sup 0}, and 3.9{plus minus}0.5 mb (0.31{plus minus}0.08 mb) for {bar {Lambda}} {sup 0}. The multiplicity ratio for {ital p} {sup 20}Ne and {ital pN} interactions is 1.58{plus minus}0.16 for {ital K}{sub {ital S}}{sup 0}, 1.95{plus minus}0.23 for {Lambda}{sup 0}, and 1.12{plus minus}0.43 for {bar {Lambda}} {sup 0}. We have observed the {Sigma}{sup 0}(1193) hyperon and measured the average multiplicity ({ital n}{sub {Sigma}}{sup 0}=0.049{plus minus}0.027) for {ital x}{sub {ital F}}{le}0. We have also observed the strange resonances {ital K}{sup *}(892), {ital K}{sup *}(1415), and {Sigma}{sup *}(1385) with {ital x}{sub {ital F}}{le}0 and measured the fraction of {ital V}{sup 0} coming from each resonance. {Lambda}{sup 0} polarization for {ital x}{sub {ital F}}{le}0 is measured and shows a decrease as {ital p}{sub {perpendicular}} increases ({ital p}{sub {Lambda}}({ital p} {sup 20}Ne){approx}{minus}0.25 at {ital p}{sub {perpendicular}}=1.5 GeV/{ital c}), in agreement with other experiments which measure polarization in the region {ital x}{sub {ital F}}{much gt}0. Since (43{plus minus}7)% of the {Lambda}{sup 0} are produced in {Sigma}{sup 0}{r arrow}{Lambda}{sup 0}{gamma} decays, the {Lambda}{sup 0} polarization is significantly greater than the measured values.

• OSTI ID: 5664807
• Journal Information: Physical Review, D (Particles Fields); (USA), Vol. 43:9; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
KAONS NEUTRAL SHORT-LIVED
PARTICLE PRODUCTION
LAMBDA PARTICLES
PROTON-NUCLEON INTERACTIONS
SIGMA NEUTRAL PARTICLES
BUBBLE CHAMBERS
CROSS SECTIONS
GEV RANGE 100-1000
HYPERONS
INCLUSIVE INTERACTIONS
INELASTIC SCATTERING
MONTE CARLO METHOD
MULTIPLICITY
NEON 20
PARTON MODEL
POLARIZATION
STRANGE PARTICLES
BARYON-BARYON INTERACTIONS
BARYONS
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FERMIONS
GAS TRACK DETECTORS
GEV RANGE
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
ISOTOPES
KAONS
KAONS NEUTRAL
LAMBDA BARYONS
LIGHT NUCLEI
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESONS
NEON ISOTOPES
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SCATTERING
SIGMA BARYONS
SIGMA PARTICLES
STABLE ISOTOPES
STRANGE MESONS
645103* - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Interactions & Baryon & Meson Properties
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