Abstract
We compare the mean-over-variance ratio of the net-kaon distribution calculated within a state-of-the-art hadron resonance gas model to the latest experimental data from the Beam Energy Scan at RHIC by the STAR collaboration. Our analysis indicates that it is not possible to reproduce the experimental results using the freeze-out parameters from the existing combined fit of net-proton and net-electric charge mean-over-variance. The strange mesons need about 10-15 MeV higher temperatures than the light hadrons at the highest collision energies. In view of the ongoing lambda fluctuation measurements, we predict the net-lambda variance-over-mean at the light and strange chemical freeze-out parameters. We observe that the lambda fluctuations are sensitive to the difference in the freeze-out temperatures established in this analysis. Our results have implications for other phenomenological models in the field of relativistic heavy-ion collisions.
Highlights
Relativistic heavy-ion collisions performed at particle accelerator facilities such as the Large Hadron Collider (LHC) at CERN and the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory re-create an early state of the universe that existed microseconds after the Big Bang
The red bands are the susceptibilities in the Hadron Resonance Gas (HRG) model calculated along the isentropes, and the gray bands correspond to the experimental values with error bars included
We found that the experimental results for the kaons cannot be reproduced by utilizing the freeze-out parameters for the light hadrons, which were determined by the combined fit of net-proton and net-electric charge
Summary
Relativistic heavy-ion collisions performed at particle accelerator facilities such as the Large Hadron Collider (LHC) at CERN and the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory re-create an early state of the universe that existed microseconds after the Big Bang. This state of matter from the primordial universe is the Quark-Gluon Plasma (QGP), so-called because it is the high temperature and density form of matter in which quarks and gluons are deconfined. The experimental results for different observables can be linked to the freeze-out stages in the evolution of the system
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
