3 papers
hep-ph2025
Two-Loop Extraction of the Pion-Nucleon Sigma Term
Ze-Rui Liang, Han-Xue Chen, Feng-Kun Guo +2
The pion-nucleon sigma term, characterizing the mass component of Higgs origin related to and quarks inside the nucleon, is investigated within relativistic baryon chiral p…
hep-ph2025
Nucleon mass in covariant baryon chiral perturbation theory at leading two-loop order
Ze-Rui Liang, Han-Xue Chen, Feng-Kun Guo +2
We calculate the nucleon mass within a manifestly relativistic formulation of baryon chiral perturbation theory (BChPT), extending the framework to leading two-loop order ($\mathca…
hep-ph2025
Chiral Representation of the Nucleon Mass at Leading Two-loop Order
Ze-Rui Liang, Han-Xue Chen, Feng-Kun Guo +2
We calculate the nucleon mass in a manifestly relativistic baryon chiral perturbation theory up to the leading two-loop order. Through dimensional counting analysis, we perform the…