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 ini...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269322006712 |
| _version_ | 1797987801254330368 |
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| author | Thiranat Bumnedpan Jan Steinheimer Marcus Bleicher Ayut Limphirat Christoph Herold |
| author_facet | Thiranat Bumnedpan Jan Steinheimer Marcus Bleicher Ayut Limphirat Christoph Herold |
| author_sort | Thiranat Bumnedpan |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-11T07:53:55Z |
| format | Article |
| id | doaj.art-92e60474b4ce4c7b8b337e983061e6b1 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-11T07:53:55Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-92e60474b4ce4c7b8b337e983061e6b12022-12-22T04:36:00ZengElsevierPhysics Letters B0370-26932022-12-01835137537Enhanced pion-to-proton ratio at the onset of the QCD phase transitionThiranat Bumnedpan0Jan Steinheimer1Marcus Bleicher2Ayut Limphirat3Christoph Herold4Center of Excellence in High Energy Physics & Astrophysics, School of Physics, Suranaree University of Technology, Nakhon Ratchasima, 30000, ThailandFrankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, 60438 Frankfurt am Main, GermanyInstitut für Theoretische Physik, Goethe Universität Frankfurt, Max-von-Laue-Strasse 1, Frankfurt am Main, 60438, Germany; Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Center for Heavy Ion Physics, Campus Frankfurt, Max-von-Laue-Str. 12, Frankfurt, 60438, GermanyCenter of Excellence in High Energy Physics & Astrophysics, School of Physics, Suranaree University of Technology, Nakhon Ratchasima, 30000, ThailandCenter of Excellence in High Energy Physics & Astrophysics, School of Physics, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand; Corresponding author.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.http://www.sciencedirect.com/science/article/pii/S0370269322006712elsarticle.clsLaTeXElsevierTemplate |
| spellingShingle | Thiranat Bumnedpan Jan Steinheimer Marcus Bleicher Ayut Limphirat Christoph Herold Enhanced pion-to-proton ratio at the onset of the QCD phase transition Physics Letters B elsarticle.cls LaTeX Elsevier Template |
| title | Enhanced pion-to-proton ratio at the onset of the QCD phase transition |
| title_full | Enhanced pion-to-proton ratio at the onset of the QCD phase transition |
| title_fullStr | Enhanced pion-to-proton ratio at the onset of the QCD phase transition |
| title_full_unstemmed | Enhanced pion-to-proton ratio at the onset of the QCD phase transition |
| title_short | Enhanced pion-to-proton ratio at the onset of the QCD phase transition |
| title_sort | enhanced pion to proton ratio at the onset of the qcd phase transition |
| topic | elsarticle.cls LaTeX Elsevier Template |
| url | http://www.sciencedirect.com/science/article/pii/S0370269322006712 |
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