Feng-Kun Guo

activity

20242026

collaborators

10 papers

hep-ph2026

Neutrinoless double beta decays of hyperons in covariant chiral perturbation theory

Zi-Ying Zhao, Ze-Rui Liang, Feng-Kun Guo +2

Neutrinoless double beta ( $0 ν β β$ ) decays of spin-1/2 hyperons are investigated in a covariant baryon chiral perturbation theory framework, extended by a $Δ L = 2$ operator proportiona…

hep-ph2026

Hyperon neutrinoless double beta decays in chiral perturbation theory

Zi-Ying Zhao, Ze-Rui Liang, Feng-Kun Guo +2

We study the neutrinoless double beta decays of spin-1/2 hyperons, $B_{1}^{-} \to B_{2}^{+} ℓ^{-} ℓ^{-}$ with $B_{1}^{-} \in {Σ^{-}, Ξ^{-}}$ and $B_{2}^{+} \in {p, Σ^{+}}$ , which violate lepton number…

hep-ph2025

Renormalization of chiral perturbation theory with spinless matter field in curved spacetime

Cheng-Cheng Li, Xiong-Hui Cao, Feng-Kun Guo

We generalize chiral perturbation theory with spinless matter fields in the fundamental representation of $SU (N)$ to curved spacetime in the presence of an external gravitati…

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 $u$ and $d$ 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

Revisiting Roy-Steiner-equation analysis of pion-kaon scattering from lattice QCD data

Xiong-Hui Cao, Feng-Kun Guo, Zhi-Hui Guo +1

A comprehensive analysis of $π K \to π K$ and $π π \to K K ˉ$ amplitudes at large unphysical pion mass for all important partial waves is presented. A set of crossing-…