Nuclear clusters as a probe for expansion flow in heavy ion reactions at (10{endash}15)A GeV

Journal Article · Sat Mar 01 04:00:00 EST 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.55.1443· OSTI ID:513491

Mattiello, R ^[1]; Mattiello, R; Sorge, H ^[2]; Stoecker, H; Greiner, W ^[3]

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1. Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Physics Department, SUNY at Stony Brook, Stony Brook, New York 11974 (United States)
3. Institut fuer Theoretische Physik, J.W. Goethe Universitaet, D-60054 Frankfurt am Main (Germany)

A phase space coalescence description based on the Wigner-function method for cluster formation in relativistic nucleus-nucleus collisions is presented. The momentum distributions of nuclear clusters d, t, and He are predicted for central Au(11.6A GeV)Au and Si(14.6A GeV)Si reactions in the framework of the relativistic quantum molecular dynamics transport approach. Transverse expansion leads to a strong shoulder-arm shape and different inverse slope parameters in the transverse spectra of nuclear clusters deviating markedly from thermal distributions. A clear {open_quotes}bounce-off{close_quote}{close_quote} event shape is seen: The averaged transverse flow velocities in the reaction plane are for clusters larger than for protons. The cluster yields, particularly at low p{sub t} at midrapidities, and the in-plane (anti)flow of clusters and pions change if suitably strong baryon potential interactions are included. This allows one to study the transient pressure at high density via the event shape analysis of nucleons, nucleon clusters, and other hadrons. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 513491
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 55; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CLUSTER MODEL
DENSITY
EQUATIONS OF STATE
EXPANSION
FLOW MODELS
GROUND STATES
HEAVY ION REACTIONS
NUCLEAR MATTER
NUCLEONS
PHASE SPACE
SHAPE
TRANSPORT