Håvard Helstrup (for the NA57 Collaboration) 2006 J. Phys. G: Nucl. Part. Phys. 32 S89 doi:10.1088/0954-3899/32/12/S11
Håvard Helstrup (for the NA57 Collaboration)
Show affiliationsThe NA57 experiment has measured strange baryon and antibaryon production in Pb–Pb collisions at 40 A GeV/c and 158 A GeV/c beam momenta. Expansion dynamics has been investigated; transverse dynamics using blast wave fits, longitudinal dynamics obtained from rapidity distributions. HBT analysis gives results compatible with those obtained by the other methods. Similar values are observed for the transverse and longitudinal flow parameters. Particles carrying all levels of strangeness have been studied. Enhancement factors increase with the strangeness content of the particle, reaching above 20 for Ωs in central collisions. Enhancement values are strikingly similar for SPS and RHIC energies. Central-to-peripheral nuclear modification factors have been measured. The baryon/meson pattern displays similarities with that observed at RHIC.
25.75.Dw Particle and resonance production
27.80.+w 190(less-than-or-equal-to)A(less-than-or-equal-to)219
Issue 12 (December 2006)
Received 31 May 2006
Published 17 November 2006
Håvard Helstrup (for the NA57 Collaboration) 2006 J. Phys. G: Nucl. Part. Phys. 32 S89
NA57 Collaboration et al 2006 J. Phys. G: Nucl. Part. Phys. 32 2065
NA57 Collaboration et al 2005 J. Phys. G: Nucl. Part. Phys. 31 321
J Cleymans et al 2005 J. Phys. G: Nucl. Part. Phys. 31 1421
Hiroyuki Sako et al 2004 J. Phys. G: Nucl. Part. Phys. 30 S1371
The NA57 Collaboration et al 2004 J. Phys. G: Nucl. Part. Phys. 30 823
B Adeva et al 2004 J. Phys. G: Nucl. Part. Phys. 30 1929
M R Whalley 2003 J. Phys. G: Nucl. Part. Phys. 29 A1
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Ghi R Shin and Berndt Müller 2003 J. Phys. G: Nucl. Part. Phys. 29 2485