Analogue surface gravity near the QCD chiral phase transition
| Autor: | Neven Bilic, Dijana Tolić |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
High Energy Physics - Theory
Physics Quantum chromodynamics Nuclear and High Energy Physics 010308 nuclear & particles physics Horizon analogue gravity QCD chiral phase transition FOS: Physical sciences Equations of motion General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Pion High Energy Physics - Theory (hep-th) Critical point (thermodynamics) Quantum electrodynamics Quantum mechanics Dispersion relation 0103 physical sciences Trapped surface 010303 astronomy & astrophysics Scalar field |
| Zdroj: | Physics Letters B. 718:223-227 |
| ISSN: | 0370-2693 |
| DOI: | 10.1016/j.physletb.2012.10.029 |
| Popis: | Using the formalism of relativistic acoustic geometry we study the expanding chiral fluid in the regime of broken chiral symmetry near the QCD chiral phase transition temperature T_c. The dynamics of pions below T_c is described by the equation of motion for a massless scalar field propagating in curved spacetime similar to an open FRW universe. The metric tensor depends locally on the soft pion dispersion relation and the four-velocity of the fluid. In the neighborhood of the critical point an analogue trapped region forms with the analogue trapped horizon as its boundary. We show that the associated surface gravity diverges near the critical point as 1/(T_c-T). Hence, if the horizon forms close to the critical temperature the analogue Hawking temperature may be comparable with or even larger than the background fluid temperature. 11 pages, typos corrected, clarifications added, references added, accepted in Phys. Lett. B |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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