MULTIPLICITY DEPENDENCE OF THE PION SOURCE IN S+A COLLISIONS AT THE CERN SPS

Authors
KAIMI K BOGGILD H BOISSEVAIN J CHERNEY M DODD J ESUMI S FABJAN CW FIELDS DE FRANZ A HOLZER B HUMANIC TJ JACAK B JAYANTI R KALECHOFSKY H KOBAYASHI T LEE YY LELTCHOUK M LORSTAD B MAEDA N MEDVEDEV A MIYABAYASHI A MURRAY M NISHIMURA S NOTEBOOM E PANDEY SU PIUZ F POLYCHRONAKOS V POTEKHIN M POULARD G SAKAGUCHI A SCHMIDTSORENSEN J SIMONGILLO J SONDHEIM W SUGITATE T SULLIVAN JP SUMI Y VANHECKE H WILLIS WJ WOLF K XU N
Citation
K. Kaimi et al., MULTIPLICITY DEPENDENCE OF THE PION SOURCE IN S+A COLLISIONS AT THE CERN SPS, Zeitschrift fur Physik. C, Particles and fields, 75(4), 1997, pp. 619-625
Citations number
35
Categorie Soggetti
Physics, Particles & Fields
Journal title
Zeitschrift fur Physik. C, Particles and fields → ACNP
ISSN journal
01709739
Volume
75
Issue
4
Year of publication
1997
Pages
619 - 625
Database
ISI
SICI code
0170-9739(1997)75:4<619:MDOTPS>2.0.ZU;2-N
Abstract
The emission of pions from relativistic heavy-ion. collisions of S+S, S+Ag and S+Pb at 200 GeV/nucleon is characterized using two-particle i nterferometry. The multiplicity dependence of the pion source paramete rs near multiplicity is studied. The transversal (Rt) and longitudinal (RI) pion source parameters are independent of the initial nuclei in the interaction and increase with increasing multiplicity. This sugges ts that the freeze-out process is governed mainly by the particle mult iplicity, The multiplicity dependence is weaker than that expected fro m a simple model of a freeze-out at a constant density.