Observation of enhanced subthreshold [ital K][sup +] production in central collisions between heavy nuclei

Journal Article · Mon Jun 06 00:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.3650· OSTI ID:7233186

Miskowiec, D; Ahner, W; Barth, R; Cieslak, M; Debowski, M; Grosse, E; Henning, W; Koczon, P; Schicker, R; Schwab, E; Senger, P ^[1]; Baltes, P; Muentz, C; Oeschler, H; Sartorius, S; Sturm, C; Wagner, A ^[2]; Beckerle, P; Bormann, C; Brill, D ; Shin, Y; Stein, J; Stock, R; Stroebele, H ^[3]; Kohlmeyer, B; Poeppl, H; Puehlhofer, F; Speer, J; Voelkel, K ^[4]; Walus, W ^[5]

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1. Gesellschaft fuer Schwerionenforschung, D-64220 Darmstadt (Germany)
2. Technische Hochschule Darmstadt, D-64289 Darmstadt (Germany)
3. Johann Wolfgang Goethe Universitaet, D-60486 Frankfurt (Germany)
4. Philipps Universitaet, D-35037 Marburg (Germany)
5. Jagiellonian University, PL-30-059 Krakow (Poland)

In the very heavy collision system [sup 197]Au+[sup 197]Au the [ital K][sup +] production process was studied as a function of impact parameter at 1 GeV/nucleon, a beam energy well below the free [ital N]-[ital N] threshold. The [ital K][sup +] multiplicity increases more than linearly with the number of participant nucleons and the [ital K][sup +]/[pi][sup +] ratio rises significantly when going from peripheral to central collisions. The measured [ital K][sup +] double differential cross section is enhanced by a factor of 6 compared to microscopic transport calculations if secondary processes ([Delta][ital N][r arrow][ital K][Lambda][ital N] and [Delta][Delta][r arrow][ital K][Lambda][ital N]) are ignored.

• OSTI ID: 7233186
• Journal Information: Physical Review Letters; (United States), Vol. 72:23; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
GOLD 197 REACTIONS
PARTICLE PRODUCTION
GOLD 197 TARGET
KAONS PLUS
DIFFERENTIAL CROSS SECTIONS
GEV RANGE 100-1000
IMPACT PARAMETER
MULTIPLICITY
BOSONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
GEV RANGE
HADRONS
HEAVY ION REACTIONS
KAONS
MESONS
NUCLEAR REACTIONS
PSEUDOSCALAR MESONS
STRANGE MESONS
STRANGE PARTICLES
TARGETS
663450* - Heavy-Ion-Induced Reactions & Scattering- (1992-)