RT Journal Article T1 Entropy production in the early-cosmology pionic phase A1 Dobado González, Antonio A1 Llanes Estrada, Felipe José A1 Rodríguez Fernández, David AB We point out that in the early universe, for temperatures in the approximate interval 150-80 MeV (after the quark-gluon plasma), pions carried a large share of the entropy and supported the largest inhomogeneities. Its thermal conductivity (previously calculated) allows the characterization of entropy production due to equilibration (damping) of thermal fluctuations. Simple model distributions of thermal fluctuations are considered and the associated entropy production evaluated. PB World scientific publ co pte LTD SN 0217-751X YR 2016 FD 2016-07-30 LK https://hdl.handle.net/20.500.14352/18993 UL https://hdl.handle.net/20.500.14352/18993 LA eng NO 1. J. Rafelski and J. Birrell, J. Phys. Conf. Ser. 509, 012014 (2014).2. J. Rafelski and J. Birrell, arXiv:1404.6005.3. J. Rafelski, Nucl. Phys. B (Proc. Suppl.) 243-244, 155 (2013).4. J. Birrell, C.-T. Yang and J. Rafelski, arXiv:1406.1759.5. A. Faessler et al., EPJ Web Conf. 71, 00044 (2014).6. J. Rafelski, Eur. Phys. J. A 51, 114 (2015). 7. N. Brambilla et al., Eur. Phys. J. C 74, 2981 (2014). 8. J. M. Torres-Rincon, Hadronic transport coefficients from effective field theories, Dissertation presented to the University of Madrid (Complutense) available as a Springer thesis 2013, doi: 10.1007/978-3-319-00425-9, arXiv:1205.0782.9. A. Dobado, F. J. Llanes-Estrada and J. M. Torres Rincon, Proc. IVth Int. Conf. on Quarks and Nuclear Physics, Madrid, 2006, arXiv:hep-ph/0702130.10. A. Dobado and F. J. Llanes-Estrada, Phys. Rev. D 69, 116004 (2004). 11. L. M. Abreu et al., Ann. Phys. 326, 2737 (2011). 12. D. Cabrera et al., J. Phys. Conf. Ser. 503, 012017 (2014).13. D. Fernandez-Fraile and A. Gomez Nicola, Phys. Rev. D 73, 045025 (2006). 14. D. Davesne, Phys. Rev. C 53, 3069 (1996). 15. M. Prakash, M. Prakash, R. Venugopalan and G. M. Welke, Phys. Rev. Lett. 70, 1228 (1993). 16. S. Mitra and S. Sarkar, Phys. Rev. D 89, 054013 (2014). 17. I. Kuznetsova and J. Rafelski, Phys. Rev. C 82, 035203 (2010), arXiv:1002.0375. 18. I. Kuznetsova, D. Habs and J. Rafelski, Phys. Rev. D 78, 014027 (2008). 19. F. S. Labini, Class. Quantum Grav. 28, 164003 (2011). 20. ALICE Collab. ( B. B. Abelev et al.), Phys. Lett. B 728, 25 (2014). 21. Planck Collab. (P. A. R. Ade et al.), Planck 2015 results, XIII: Cosmological parameters, arXiv:1502.01589[astro-ph.CO].22. Planck Collab. (P. A. R. Ade et al.), Planck 2015 results, XX: Constraints on inflation.23. Particle Data Group ( J. Beringer et al.), Phys. Rev. D 86, 010001 (2012). 24. S. Burles, K. M. Nollett and M. S. Turner, Astrophys. J. 552, L1 (2001). 25. S. Weinberg, Cosmology, 1st edn. (Oxford University Press, 2008).26. G. Lebon, D. Jou and J. Casas-Vázquez, Understanding Nonequilibrium Thermodynamics, 1st edn. (Springer-Verlag, Berlin, 2008), see Eq. (2.47).27. E. Milotti, Invited paper at the 2ndo. Encuentro del Grupo Latinoamericano de Emision Acustica y 1ro. Iberoamericano, E-GLEA-2, Buenos Aires (Argentina), 11–14 September 2001, arXiv:physics/0204033. NO © World scientific publ co pte LTD.We thank Antonio Maroto for a critical reading of the cosmology aspects of the work. Supported by the Spanish Excellence Network on Hadronic Physics FIS2014-57026-REDT, and by grants UCM:910309, MINECO:FPA2011-27853-C02-01, MINECO:FPA2014- 53375-C2-1-P and CPAN Consolider-Ingenio 2010. DRF was partially supported by a GRUPIN 14-108 research grant from Principado de Asturias. NO Ministerio de Economía y Competitividad (MINECO) NO Spanish Excellence Network on Hadronic Physics (HADROnet) = Red de Excelanecia "Física Hadrónica" (MINECO) NO Universidad Complutense de Madrid (UCM) NO Actividad Investigadora CONSOLIDER - INGENIO 2010 (MINECO) NO Centro Nacional de Física de Partículas, Astropartículas y Nuclear (CPAN) NO Principado de Asturias DS Docta Complutense RD 28 abr 2024