Počet záznamů: 1  

Light meson gas in the QCD vacuum and oscillating universe

  1. 1.
    0486476 - ÚJF 2019 RIV GB eng J - Článek v odborném periodiku
    Prokhorov, G. - Pasechnik, Roman
    Light meson gas in the QCD vacuum and oscillating universe.
    Journal of Cosmology and Astroparticle Physics. Roč. 2018, č. 1 (2018), č. článku 017. ISSN 1475-7516. E-ISSN 1475-7516
    Institucionální podpora: RVO:61389005
    Klíčová slova: particle physics - cosmology connection * cosmological phase transitions * physics of the early universe
    Obor OECD: Astronomy (including astrophysics,space science)
    Impakt faktor: 5.524, rok: 2018

    We have developed a phenomenological effective quantum-field theoretical model describing the 'hadron gas' of the lightest pseudoscalar mesons, scalar sigma-meson and sigma-vacuum, i.e. the expectation value of the sigma-field, at finite temperatures. The corresponding thermodynamic approach was formulated in terms of the generating functional derived from the effective Lagrangian providing the basic thermodynamic information about the 'meson plasma + QCD condensate' system. This formalism enables us to study the QCD transition from the hadron phase with direct implications for cosmological evolution. Using the hypothesis about a positively-definite QCD vacuum contribution stochastically produced in early universe, we show that the universe could undergo a series of oscillations during the QCD epoch before resuming unbounded expansion.
    Trvalý link: http://hdl.handle.net/11104/0281350

     
     
Počet záznamů: 1  

  Tyto stránky využívají soubory cookies, které usnadňují jejich prohlížení. Další informace o tom jak používáme cookies.