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

We construct an extended version of the linear sigma model in such a way asto describe spin-$1$ hadrons as well as spin-$0$ hadrons in two-color QCD(QC$_2$D) by respecting the Pauli-G\"{u}rsey $SU(4)$ symmetry. Within amean-field approximation, we therefrom examine a mass spectrum of the spin-$1$hadrons at finite quark chemical potential ($\mu_q$) and zero temperature. Notonly mean fields of scalar mesons and scalar-diquark baryons but also of vectormesons and vector-diquark baryons are incorporated. As a result, we find that,unless all of those four types of mean fields are taken into account, neitherlattice result for the critical $\mu_q$ that corresponds to the onset of baryonsuperfluidity nor for $\mu_q$ dependence of the pion mass can be reproduced. Wealso find that a slight suppression of the $\rho$ meson mass in the superfluidphase, which was suggested by the lattice simulation, is reproduced by subtlemixing effects between spin-$0$ and spin-$1$ hadrons. Moreover, we demonstratethe emergence of an axialvector condensed phase and possibly of a vectorcondensed phase by identifying the values of $\mu_q$ at which the correspondinghadron masses vanish. The possible presence of iso-triplet $1^-$ diquarks thatmay be denoted by a tensor-type quark bilinear field is also discussed.

Mass spectrum of spin-one hadrons in dense two-color QCD: Novel predictions by extended linear sigma model