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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Hadron properties in dense medium are treated in a unified way in a skyrmionmodel constructed with an effective Lagrangian, in which the rho and omegavector mesons are introduced as hidden gauge bosons, valid up to O(p^4) termsin chiral expansion including the homogeneous Wess-Zumino terms. All the lowenergy constants - apart from f_pi and m_rho - are fixed by the master formuladerived from the relation between 5-D hQCD and 4-D HLS. This allows one to pindown the density n_1/2 at which the skyrmions in medium fractionize intohalf-skyrmions, bringing in a drastic change in the EoS of dense matter. Wefind that the U(1) field that figures in the CS term in the hQCD action orequivalently the omega field in the hWZ term in the dimensionally reduced HLSaction plays a crucial role in the half-skyrmion phase. The importance of theomega degree of freedom may be connected to what happens in the instantonstructure of elementary baryon noticed in hQCD. The most striking andintriguing in what is found in the model is that f_pi that smoothly drops withincreasing density in the skyrmion phase stops decreasing at n_1/2 and remainsnearly constant in the half-skyrmion phase. In accordance with the large N_cconsideration, the baryon mass also stays non-scaling in the half-skyrmionphase. This feature which is reminiscent of the parity-doublet baryon modelwith a chirally invariant mass m_0 is supported by the nuclear EFT with theparameters of the Lagrangian scaling modified at the skyrmion-half-skyrmionphase transition. It also matches with one-loop RG analysis based on HLS. Alink between a non-vanishing m_0 and the origin of nucleon mass distinctivefrom dynamically generated mass is suggested. We briefly discuss the possibleconsequences of the topology change found in this paper on the forthcomingexperiments at the RIB machines under construction.

Dense Baryonic Matter in Hidden Local Symmetry Approach: Half-Skyrmions and Nucleon Mass