nucl-th digest · Oct 31, 2018

$γ^{*} γ \to η, η^{'}$ transition form factors

Minghui Ding🇨🇳 · Khepani Raya🇨🇳 · Adnan Bashir🇲🇽 · Daniele Binosi🇮🇹 · Lei Chang🇨🇳 · Muyang Chen🇨🇳 · Craig D. Roberts🇺🇸

Using a continuum approach to the hadron bound-state problem, we calculate $γ^{*} γ \to η, η^{'}$ transition form factors on the entire domain of spacelike momenta, for comparison with existing experiments and in anticipation of new precision data from next-generation $e^{+} e^{-}$ colliders. One novel feature is a model for the contribution to the Bethe-Salpeter kernel deriving from the non-Abelian anomaly, an element which is crucial for any computation of $η, η^{'}$ properties. The study also delivers predictions for the amplitudes that describe the light- and strange-quark distributions within the $η, η^{'}$ . Our results compare favourably with available data. Important to this at large- $Q^{2}$ is a sound understanding of QCD evolution, which has a visible impact on the $η^{'}$ in particular. Our analysis also provides some insights into the properties of $η, η^{'}$ mesons and associated observable manifestations of the non-Abelian anomaly.

nucl-thhep-exhep-lathep-ph+1PRD(2019)·83 citations

Chiral soliton lattice effect on baryonic matter from skyrmion crystal model

The chiral soliton lattice (CSL) has been studied in condensed-matter system such as chiral magnets, which arises as a parity-violating topological soliton. In hadron physics, various attempts have also been made to apply the idea of CSL to baryonic matter. In this work, we explore the CSL effects on the baryonic matter based on the skrymion crystal approach. It is found that the CSL causes an inverse catalysis for the topology change in the dense baryonic matter. Furthermore, we observe that the CSL makes the single-baryon shape deformed to be highly oscillating as the frequency of the CSL gets larger, which leads to the enhancement of a baryon energy. Of interest is that in a high density region, the CSL goes away due to the topology change in the baryonic matter. What we find here might deepen our understanding of dense matter systems as well as compact stars.

nucl-thPRC(2019)·23 citations

Wednesday·October 31, 2018

$γ^{*} γ \to η, η^{'}$ transition form factors

Chiral soliton lattice effect on baryonic matter from skyrmion crystal model

Affiliations

γ∗γ→η,η′ transition form factors

Chiral soliton lattice effect on baryonic matter from skyrmion crystal model

Affiliations

$γ^{*} γ \to η, η^{'}$ transition form factors