Enhanced pion-to-proton ratio at the onset of the QCD phase transition
- The pion-to-proton ratio is identified as a potential signal for a non-equilibrium first-order chiral phase transition in heavy-ion collisions, as the pion multiplicity is directly related to entropy production. To showcase this effect, a non-equilibrium Bjorken expansion starting from realistic initial conditions along a Taub adiabat is used to simulate the entropy production. Different dynamical criteria to determine the final entropy-per-baryon number are investigated and matched to a hadron resonance gas model along the chemical freeze out curve to obtain the final pion and proton numbers. We detect a strong enhancement of their multiplicity ratio at the energies where the system experiences a strong phase transition as compared to a smooth crossover which shows almost no enhancement.
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| Author: | Thiranat BumnedpanORCiD, Jan SteinheimerORCiDGND, Marcus BleicherORCiDGND, Ayut LimphiratORCiD, Christoph HeroldORCiDGND |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-782595 |
| DOI: | https://doi.org/10.1016/j.physletb.2022.137537 |
| ISSN: | 0370-2693 |
| Parent Title (English): | Physics Letters B |
| Publisher: | Elsevier |
| Place of publication: | Amsterdam |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2022/11/03 |
| Date of first Publication: | 2022/10/27 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2023/10/09 |
| Tag: | Elsevier; LaTeX; Template; elsarticle.cls |
| Volume: | 835 |
| Issue: | 137537 |
| Page Number: | 5 |
| HeBIS-PPN: | 513580689 |
| Institutes: | Physik |
| Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS) | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - CC BY - Namensnennung 4.0 International |
