What can we learn from fluctuations of particle ratios?
| dc.creator | Torrieri, Giorgio | |
| dc.date | 2007-09-05 | |
| dc.date.accessioned | 2026-07-07T08:27:43Z | |
| dc.date.available | 2026-07-07T08:27:43Z | |
| dc.description | We explain how fluctuations of ratios can constrain and falsify the statistical model of particle production in heavy ion collisions, using $K/π$ fluctuations as an example. We define an observable capable of determining which statistical model, if any, governs freeze-out in ultrarelativistic heavy ion collisions. We calculate this observable for $K/π$ fluctuations, and show that it should be the same for RHIC and LHC energies, as well as independent of centrality, if the Grand-Canonical statistical model is an appropriate description and chemical equilibrium applies. We describe variations of this scaling for deviations from this scenario, such as light quark chemical non-equilibrium, strange quark over-saturation and local conservation (canonical ensemble) for strange quarks. We also introduce a similar observable capable, together with the published $K^*/K$ measurement, of ascertaining if an interacting hadron gas phase governs the system between thermal and chemical freeze-out, and of ascertaining its duration and impact on hadronic chemistry. | |
| dc.description | Talk, Critical Point and the Onset of Deconfinement 2007 | |
| dc.identifier | https://arxiv.org/abs/0709.0587 | |
| dc.identifier | http://arxiv.org/abs/0709.0587 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/137366 | |
| dc.subject | Nuclear Theory | |
| dc.subject | High Energy Physics - Experiment | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Nuclear Experiment | |
| dc.title | What can we learn from fluctuations of particle ratios? | |
| dc.type | text |