Particle ratios of high- x sub t hadrons in p - A interactions at radical s =38. 8 GeV

Journal Article · Fri May 01 00:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.3030· OSTI ID:7114026

Straub, P B; Jaffe, D E; Glass, H D; Adams, M R; Brown, C N; Charpak, G; Cooper, W E; Crittenden, J A; Finley, D A; Gray, R; Hemmi, Y; Hsiung, Y B; Hubbard, J R; Jonckheere, A M; Joestlein, H; Kaplan, D M; Lederman, L M; Luk, K B; Maki, A; Mangeot, P ; McCarthy, R L; Miyake, K; Plaag, R E; Rutherfoord, J P; Sakai, Y; Santiard, J C; Sauli, F; Smith, S R; Yoshida, T; Young, K K ^[1]

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1. Centre d'Etudes Nucleaires de Saclay; Gif-sur-Yvette; 91190 France CERN; CH-1124 Geneva 23 (Switzerland) Columbia University; New York; New York 10027 (United States) Fermi National Accelerator Laboratory; Batavia; Illinois 60510 (United States) Florida State University; Tallahassee; Florida 32306 (United States) KEK; Tsukuba; Ibaraki-ken 305; Japan Kyoto University; Kyoto 606 (Japan) State University of New York; Stony Brook; New York 11794 (United States) University of Washington; Seattle; Washington 98195 (United States)

We report measurements of the ratios {ital K}{sup +}/{pi}{sup +}, {ital p}/{pi}{sup +}, {ital K}{sup {minus}}/{pi}{sup {minus}}, {ital {bar p}}/{pi}{sup {minus}}, {pi}{sup {minus}}/{pi}{sup +}, {ital K}{sup {minus}}/{ital K}{sup +}, and {ital {bar p}}/{ital p} for hadrons with 0.19{lt}{ital x}{sub {ital t}}{lt}0.62 produced in {ital p}-Be and {ital p}-W collisions at {radical}{ital s} =38.8 GeV. The {ital K}{sup +}/{pi}{sup +} ratio at high {ital x}{sub {ital t}} gives the fragmentation-function ratio {ital D}{sub {ital u}}{sup {ital K}+}/{ital D}{sub {ital u}}{sup {pi}+} at high {ital z}. The high-{ital x}{sub {ital t}} {ital K}{sup {minus}}/{pi}{sup {minus}} ratio gives an upper limit for {ital D}{sub {ital d}}{sup {ital K}{minus}}/{ital D}{sub {ital d}}{sup {pi}{minus}} at high {ital z}. The {ital p}{sub {ital t}} dependence of {ital p}/{pi}{sup +} suggests that scattered constituent diquarks are the primary source of protons with {ital p}{sub {ital t}}{lt}6 GeV/{ital c}. We also present species correlations in high-mass {ital h}{sup +}{ital h{minus}} pairs. Strong {ital K}{sup +}{ital K{minus}} and {ital p{bar p}} correlations were observed.

• OSTI ID: 7114026
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 45:9; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662340* -- Hadron Interactions-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALKALINE EARTH METALS
ANGULAR DISTRIBUTION
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
BARYON-BARYON INTERACTIONS
BARYONS
BERYLLIUM
BOSONS
CHERENKOV COUNTERS
DATA
DISTRIBUTION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
FRAGMENTATION
GEV RANGE
GEV RANGE 10-100
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
KAONS
KAONS MINUS
KAONS PLUS
MATTER
MEASURING INSTRUMENTS
MESONS
METALS
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PIONS
PIONS MINUS
PIONS PLUS
PROBABILITY
PROTON-NUCLEON INTERACTIONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
SPECTROMETERS
STRANGE MESONS
STRANGE PARTICLES
TRANSITION ELEMENTS
TUNGSTEN