Polyakov loop and the Hadron resonance gas model
| Autor: | Lorenzo Luis Salcedo, Eugenio Megias Fernandez, Eugenio Megias, Enrique Ruiz Arriola |
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| Rok vydání: | 2021 |
| Předmět: |
Quark
Quantum chromodynamics Physics High Energy Physics - Theory Particle physics Meson High Energy Physics::Lattice Hadron High Energy Physics - Lattice (hep-lat) Nuclear Theory High Energy Physics::Phenomenology General Physics and Astronomy FOS: Physical sciences Exotic hadron Deconfinement Baryon High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Lattice High Energy Physics - Theory (hep-th) High Energy Physics::Experiment Sum rule in quantum mechanics Nuclear Experiment |
| Zdroj: | Recercat: Dipósit de la Recerca de Catalunya Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) Recercat. Dipósit de la Recerca de Catalunya instname Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona |
| Popis: | The Polyakov loop has been used repeatedly as an order parameter in the deconfinement phase transition in QCD. We argue that, in the confined phase, its expectation value can be represented in terms of hadronic states, similarly to the hadron resonance gas model for the pressure. Specifically, L(T) \approx 1/2\sum_\alpha g_\alpha \,e^(-\Delta_\alpha/T), where g_\alpha are the degeneracies and \Delta_\alpha are the masses of hadrons with exactly one heavy quark (the mass of the heavy quark itself being subtracted). We show that this approximate sum rule gives a fair description of available lattice data with N_f=2+1 for temperatures in the range 150MeV Comment: 5 pages, 4 figures. Error in normalization corrected. Excited states included. Substantially revised |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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