TY  - JOUR
A1  - Thiranat Bumnedpan, 
A1  - Steinheimer, Jan
A1  - Bleicher, Marcus
A1  - Limphirat, Ayut
A1  - Herold, Christoph
T1  - Enhanced pion-to-proton ratio at the onset of the QCD phase transition
T2  - Physics Letters B
N2  - 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.
KW  - elsarticle.cls
KW  - LaTeX
KW  - Elsevier
KW  - Template
Y1  - 2022
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/78259
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-782595
SN  - 0370-2693
VL  - 835
IS  - 137537
PB  - Elsevier
CY  - Amsterdam
ER  -