9 papers
Symmetry Constraints on Pion Valence Structure
Xiaobin Wang, Lei Chang, Minghui Ding +2
The profile of the pion valence quark distribution function (DF) remains controversial. Working from the concepts of QCD effective charges and generalised parton distributions, we…
Radiative charmonium decays in a contact-interaction model with dynamical quark anomalous magnetic moment
Yehan Xu, Zanbin Xing, Khépani Raya +1
The BESIII Collaboration has recently reported two measurements of the two-photon decay width of the meson. The 2024 result is significantly larger than most theoretical and…
The Dichotomous Nature of the Meson and the Nucleon D-Term
Zanbin Xing, Khépani Raya, Yu-xin Liu +1
Employing a symmetry-preserving contact-interaction formulation of the Dyson-Schwinger equations in quantum chromodynamics (QCD), we examine the identity of the meson and its…
Electromagnetic structure of axial-vector mesons and implications for the muon
Zanbin Xing, Lei Chang, Khépani Raya
The electromagnetic structure of axial-vector mesons is investigated via elastic and two-photon transition form factors (TFFs). To this end, we employ a framework based on the Dyso…
and couplings from Dyson-Schwinger equations framework
Yin-Zhen Xu, Khépani Raya
Employing a unified Dyson-Schwinger/Bethe-Salpeter equations approach, we calculate the strong decay couplings and within the so-called impulse-approximation…
Empirical Determination of the Kaon Distribution Amplitude
Lei Chang, Yu-Bin Liu, Khépani Raya +1
We propose a data-driven approach to extract the Kaon leading-twist distribution amplitude (DA) from empirical information on the ratio of the neutral-to-charged kaon electromagnet…