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Pion gravitational form factors in an algebraic rainbow-ladder model

  • Jiayin Kang
  • Lei Chang
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Abstract

Within rainbow-ladder truncation, we identify three contributions to the pion's gravitational form factors---graviton coupling to the quark, to the gluon dressing the quark, and to the gluon binding the pion---and separate them into quark and gluon parts. Using an algebraic quark model with a dynamical basis, we obtain A(0)=1, D(0)=−1 in the chiral limit, and momentum fractions ⟨ x⟩q=0.896, ⟨ x⟩g=0.104. The D-term obeys the same partition at the model scale.

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Cite

BibTeXRIS
BibTeX
@misc{kang2026pion,
  title = {{Pion gravitational form factors in an algebraic rainbow-ladder model}},
  author = {Jiayin Kang and Lei Chang},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.04386},
  eprint = {2610.04386},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.04386},
}
RIS
TY  - UNPB
TI  - Pion gravitational form factors in an algebraic rainbow-ladder model
AU  - Jiayin Kang
AU  - Lei Chang
PY  - 2026
DA  - 2026/10/03
PB  - arXiv
DO  - 10.48550/arxiv.2610.04386
UR  - https://arxiv.org/abs/2610.04386
AB  - Within rainbow-ladder truncation, we identify three contributions to the pion's gravitational form factors---graviton coupling to the quark, to the gluon dressing the quark, and to the gluon binding the pion---and separate them into quark and gluon parts. Using an algebraic quark model with a dynamical basis, we obtain A(0)=1, D(0)=−1 in the chiral limit, and momentum fractions ⟨ x⟩_q=0.896, ⟨ x⟩_g=0.104. The D-term obeys the same partition at the model scale.
ER  -