A dependence of highly inelastic p -nucleus collisions

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.41.1371· OSTI ID:6850584

Sambamurti, A; Blessing, S; Crittenden, R; Draper, P; Dzierba, A; Heinz, R; Krider, J; Marshall, T; Martin, J; Smith, P; Sulanke, T; Stewart, C; Zieminski, A ^[1]; Gomez, R ^[2]; Dauwe, L; Haggerty, H; Malamud, E; Nikolic, M ^[3]; Hagopian, S ^[4]; Abrams, R ; Ares, J; Goldberg, H; Halliwell, C; Margulies, S; McLeod, D; Salminen, A; Solomon, J; Wu, G ^[5]; Ellsworth, R ^[6]; Goodman, J; Gupta, S; Yodh, G ^[7]; Watts, T ^[8]; Abramov, V; Antipov, Y; Baldin, B; Denisov, S; Glebov, V; Gorin, Y; Kryshkin, V; Petrukhin, A

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1. Indiana University, Bloomington, Indiana 47405 (USA)
2. California Institute of Technology, Pasadena, California 91125 (USA)
3. Fermilab, Batavia, Illinois 60510 (USA)
4. Florida State University, Tallahassee, Florida 32306 (USA)
5. University of Illinois at Chicago, Chicago, Illinois 60680 (USA)
6. George Mason University, Fairfax, Virginia 22030 (USA)
7. University of Maryland, College Park, Maryland 20742 (USA)
8. Rutgers University, Piscataway, New Jersey 08854 (USA)

The nuclear ({ital A}) dependence of the event structure in the central and forward (projectile fragmentation) regions has been studied for highly inelastic proton-nucleus ({ital pA}) collisions at an incident momentum of 800 GeV/{ital c}. Events with high values of transverse energy ({ital E}{sub {ital t}}) were selected using the large-acceptance Fermilab multiparticle spectrometer. The multiplicity distributions and energy flows in different regions of phase space are presented for six nuclear targets: H, Be, C, Al, Cu, and Pb. The event structure for highly inelastic {ital pA} collisions is strongly dependent on the transverse energy observed in the central region. However at a fixed {ital E}{sub {ital t}}, there is only a weak nuclear dependence of event structure in the central and forward fragmentation regions. This observation is consistent with a thermodynamical description of inelastic {ital pA} interactions and suggests that the observed {ital E}{sub {ital t}} is a good measure of the inelasticity of the reaction. The nuclear dependence of event structure on the particle density and the energy in the forward fragmentation region is also discussed. In contrast with {ital E}{sub {ital t}} as a variable, the particle density and the forward missing energy provide measures of event inelasticity that are {ital A} dependent.

• OSTI ID: 6850584
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 41:5; 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
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ALKALINE EARTH METALS
ALUMINIUM
ANGULAR DISTRIBUTION
BARYON REACTIONS
BERYLLIUM
CARBON
CHARGED-PARTICLE REACTIONS
COPPER
CROSS SECTIONS
CYCLIC ACCELERATORS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELEMENTS
ENERGY RANGE
FERMILAB ACCELERATOR
GEV RANGE
GEV RANGE 100-1000
HADRON REACTIONS
HYDROGEN
INELASTIC SCATTERING
LEAD
MATHEMATICAL SPACE
METALS
MULTIPLICITY
NONMETALS
NUCLEAR FRAGMENTATION
NUCLEAR REACTIONS
NUCLEON REACTIONS
PHASE SPACE
PROTON REACTIONS
SCATTERING
SPACE
SYNCHROTRONS
TRANSITION ELEMENTS