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Light meson gas in the QCD vacuum and oscillating universe

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F18%3A00486476" target="_blank" >RIV/61389005:_____/18:00486476 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.1088/1475-7516/2018/01/017" target="_blank" >http://dx.doi.org/10.1088/1475-7516/2018/01/017</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1088/1475-7516/2018/01/017" target="_blank" >10.1088/1475-7516/2018/01/017</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Light meson gas in the QCD vacuum and oscillating universe

  • Original language description

    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.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10308 - Astronomy (including astrophysics,space science)

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2018

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Cosmology and Astroparticle Physics

  • ISSN

    1475-7516

  • e-ISSN

  • Volume of the periodical

    2018

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    29

  • Pages from-to

  • UT code for WoS article

    000422736200008

  • EID of the result in the Scopus database

    2-s2.0-85041423475