Nuclear dependence of high- x sub t hadron and high-. tau. hadron-pair production in p - A interactions at radical s =38. 8 GeV

Journal Article · Mon Jan 27 00:00:00 EST 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.68.452· OSTI ID:5106147

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; National Laboratory for High Energy Physics; 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 present a high-statistics, species-identified measurement of the W-to-Be per-nucleon cross-section ratio, {ital R}{sub W/Be}, for high-{ital x}{sub {ital t}} hadrons and high-{tau} {ital h}{sup +}{ital h{minus}} pairs produced in {ital p}-{ital A} collisions at {radical}{ital s} =38.8 GeV. The data extend to 0.62 in {ital x}{sub {ital t}} and 0.39 in {radical}{tau} . For single hadrons, {ital R}{sub W/Be} peaks at {ital p}{sub {ital t}}{approx}5 GeV/{ital c} and decreases to {approx}1 for mesons with {ital pt}{gt}8 GeV/{ital c}. At fixed {ital p}{sub {ital t}}, {ital R}{sub W/Be} falls with {radical}{ital s} . For symmetric pairs with {radical}{tau} {gt}0.28, {ital R}{sub W/Be}=0.84{plus minus}0.02{plus minus}0.07, suggesting a nuclear suppression of high-{ital z} fragmentation. {ital R}{sub W/Be} increases with {ital p}{sub out}, indicative of constituent multiple scattering.

• OSTI ID: 5106147
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 68:4; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

663430* -- Nucleon-Induced Reactions & Scattering-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
BARYON REACTIONS
BERYLLIUM ISOTOPES
CHARGED PARTICLE DETECTION
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DETECTION
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
GEV RANGE 10-100
HADRON REACTIONS
HADRONS
INFORMATION
ISOTOPES
KAON DETECTION
NUCLEAR FRAGMENTATION
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PARTICLE PRODUCTION
PION DETECTION
POSTULATED PARTICLES
PROTON DETECTION
PROTON REACTIONS
QUARKS
RADIATION DETECTION
TUNGSTEN ISOTOPES