Cosmological particle creation in a hadronic fluid

2014/12/31 by Neven Bilić, Neven Bilic, Dijana Tolić +1
Physics and Astronomy · #Classical mechanics #Cosmology and Gravitation Theories #Geodesic #Geometry #Hadron #Massless particle #Mathematical physics #Metric tensor #Noncommutative and Quantum Gravity Theories #Particle physics #Physics #Pion #Quantum Electrodynamics and Casimir Effect #Quantum mechanics #Space time #Spacetime #Tensor (intrinsic definition) #Theoretical physics #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.91.104025

published as Phys. Rev. D 91, 104025 (2015) · 13 pages, 4 figures, revised to match the version published in Phys. Rev. D., section IIB rewritten, section IIIC expanded, discussion on adiabaticity expanded and clarified, three references added, results unchanged

openalex publication_date 2015/05/21 · arxiv created 2015/06/11 · arxiv updated 2015/06/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Acoustic perturbations in an expanding hadronic fluid at temperatures below the chiral transition point represent massless pions propagating in curved spacetime geometry. In comoving coordinates the corresponding analog metric tensor describes a hyperbolic Friedmann-Robertson-Walker spacetime. We study the analog cosmological particle creation of pions below the critical point of the chiral phase transition. We compare the cosmological creation spectrum with the spectrum of analog Hawking radiation at the analog trapping horizon.

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