8 papers
Binding energies in the and fermion--antifermion channels from the ladder Bethe-Salpeter and Schrödinger equations
Wei He, Hai-Qing Zhou
In this work, we calculate the binding energies of an equal-mass fermion--antifermion system in the and channels from the ladder Bethe--Salpeter (BS) equation wit…
Strange Two-Photon Exchange in Time-Like Electromagnetic Form Factors
Xu Cao, Yong-Hui Lin, Hai-Qing Zhou
While two-photon exchange (TPE) effects in space-like nucleon electromagnetic form factors have been extensively studied for over two decades, their manifestations in the time-like…
Prominent enhancement of axion thermalization rate from axion-kaon interactions
Jin-Bao Wang, Zhi-Hui Guo, Hai-Qing Zhou
The axion thermalization rate is a crucial input to determine the hot dark matter bound of axions, resulting from the scattering processes in the thermal bath of early Universe. We…
Axion-like particle production from lepton-nucleon scattering in chiral effective theory
Qian-Qian Guo, Xiong-Hui Cao, Zhi-Hui Guo +1
In this work we study the axion/axion-like particle production from the lepton-nucleon scattering in the low-energy region, i.e., the processes, being t…
Isospin-breaking contribution to the model-independent axion-photon-photon coupling in chiral theory
Rui Gao, Jin Hao, Chun-Gui Duan +3
We pursue the calculation of the model-independent component of the axion-photon-photon coupling in the chiral perturbation theory up to next-to-leading order, with the emph…
In-depth Study of Spin- and Momentum-Dependent Interaction Potentials Between Two Spin-1/2 Fermions Mediated by Light Spin-0 Particles
Yang Zhong, Zhi-Hui Guo, Hai-Qing Zhou
We present a calculation by including the relativistic and off-shell contributions to the interaction potentials between two spin-1/2 fermions mediated by the exchange of light spi…
Axion production in the decay within chiral perturbation theory
Jin-Bao Wang, Zhi-Hui Guo, Zhun Lu +1
We study the axion and axion-like particle production from the decay within the chiral perturbation theory up to the one-loop level. The conventional chir…
Axion-pion scattering at finite temperature in chiral perturbation theory and its influence in axion thermalization
Jin-Bao Wang, Zhi-Hui Guo, Hai-Qing Zhou
Axion-pion scattering amplitudes at finite temperatures are calculated within chiral perturbation theory up to the one loop level. Unitarization procedure is implemented to these a…