2006/10/26 by T. Gangopadhyay, Taparati Gangopadhyay, Gangopadhyay, Taparati +8
Physics and Astronomy · #Astro and Planetary Science #Astrophysical Phenomena and Observations #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Pulsars and Gravitational Waves Research #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0610349
openalex publication_date 2006/10/26 · arxiv created 2007/04/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Parity doubling is observed in hadron states around 1.5 GeV - and the estimated energy density is found to be high. When a large excitation energy is available and the pions decouple from the quarks, the QCD interaction is still not perturbative. And signature of such a system can exist in the form of small ratio of the shear viscosity to entropy density. This is true for an equation of state which is applicable to the surface of strange star. We indicate the correspondence of parity doubling with the apparently disconnected model calculation of compactness of some pulsars.