English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The SU(3)_{r} \times SU(3)_{\ell} linear sigma model is used to study thechiral symmetry restoring phase transition of QCD at nonzero temperature. Theline of second order phase transitions separating the first order and smoothcrossover regions is located in the plane of the strange and nonstrange quarkmasses. It is found that if the U(1)_{A} symmetry is explicitly broken by theU(1)_{A} anomaly then there is a smooth crossover to the chirally symmetricphase for physical values of the quark masses. If the U(1)_{A} anomaly isabsent, then there is a phase transition provided that the \sigma meson mass isat least 600 MeV. In both cases, the region of first order phase transitions inthe quark mass plane is enlarged as the mass of the \sigma meson is increased.Comment: 5 pages, 3 figures, Revtex, discussion extended and references added.  To appear in PR

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Influence of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>U</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo><mml:mn /></mml:mrow><mml:mrow><mml:mi>A</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>anomaly on the QCD phase transition

Influence of theU(1)Aanomaly on the QCD phase transition