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 Tools annual

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 Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We discuss the well-known phenomenon of spontaneous symmetry breaking for alinear sigma model for scalar and pseudoscalar mesons based on the mesoncomposite structure and the normalization of the quantum states. To test ourformulation and validate our approach we give another proof of the Goldstonetheorem and derive the corresponding mass eigenstates of the theory. We brieflydescribe the possible wave function of a meson that leads to the adequate masseigenstates.

Spontaneous symmetry breaking and Goldstone theorem for composite states revisited