Work

Electromagnetic polarizabilities of the triplet hadrons in heavy hadron chiral perturbation theory

Year: 2026

Type: article

Abstract: We investigate the electromagnetic polarizabilities of singly heavy mesons and doubly heavy baryons within the framework of heavy hadron chiral perturbation theory up to O ( p 3 ) . We estimate the low-energy constants using the nonrelativistic constituent quark model. A striking prediction of our study is the giant electric polarizabilities of the D * mesons: α E ( D ¯ * 0 ) ≈ 294 × 10 − 4 fm 3 and α E ( D * − ) ≈ 1.42 – 64.5 i × 10 − 4 fm 3 . These anomalously large values arise from the near-degenerate mass between D * and D π , which are orders of magnitude larger than those of their bottom counterparts. This kinematic coincidence induces a pronounced cusp structure in the chiral loops, reflecting the long-range dynamics of a pion cloud. For doubly heavy baryons, polarizabilities depend strongly on heavy-flavor composition: the b c q system differs markedly from c c q and b b q due to mixing with scalar heavy-diquark states. Using heavy diquark–antiquark symmetry (HDAS), we unify the chiral dynamics of singly heavy mesons and doubly heavy baryons in the heavy-quark limit. The pion-loop contributions dominate the electromagnetic structure of heavy hadrons and provide essential benchmarks for future lattice QCD simulations.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/dlbl-1t6v

Authors: Hao Dang, Liang-Zhen Wen, Yan-Ke Chen, Shi-Lin Zhu

Institution: Peking University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Natural Science Foundation of China, Peking University

Award: G6555012630