2007/01/25 by R. Witt
Physics and Astronomy · #Astronomy #Astrophysics #Atomic physics #Baryon #Hadron #High-Energy Particle Collisions Research #Ion #Mass spectrum #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Rapidity #Resonance (particle physics) #Spectral line #Star (game theory) #Thermal #Thermodynamics #Yield (engineering) #nucl-ex
paper · pdf · doi:10.1088/0954-3899/34/8/s126
published as J.Phys.G34:S921-924,2007 · 5 pages, 3 figures, proceedings of the 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (QM2006)
arxiv created 2007/01/25 · openalex publication_date 2007/07/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present the first measurements of the transverse momentum spectra and mid-rapidity yields of the Ξ 0 (1530) multi-strange baryon resonance, from collisions at RHIC from the STAR experiment. Ratios of the mid-rapidity yield of this long-lived ( c τ = 21 fm) resonance to its non-resonance partner (the Ξ baryon) are compared to predictions from thermal models and to the corresponding ratios for other resonances previously reported by STAR. Conclusions will be drawn about the implication of these measurements for the time between chemical and thermal freeze-out (Δ t therm- chem ) and any observed deviations from the expected mass and width will be discussed.