Scholarlink

<p>We investigate the nucleon and pion gravitational <i>D</i>-form factors, by fitting a <i>σ</i>/<i>f</i><sub>0</sub>(500)-meson pole, together with a background term, to lattice data at <i>m</i><sub><i>π</i></sub> ≈ 170 MeV. We find that the fitted residues are compatible with predictions from dilaton effective theory. In this framework, the <i>σ</i>-meson takes on the role of the dilaton, the Goldstone boson of spontaneously broken scale symmetry. These results support the idea that QCD may be governed by an infrared fixed point and offer a physical interpretation of the <i>D</i>-form factor (or <i>D</i>-term) in the soft limit.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Gravitational D-form factor: the σ-meson as a dilaton confronted with lattice QCD data I

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月19日

查看全文
  • Roy Stegeman,
  • Roman Zwicky

摘要

We investigate the nucleon and pion gravitational D-form factors, by fitting a σ/f0(500)-meson pole, together with a background term, to lattice data at mπ ≈ 170 MeV. We find that the fitted residues are compatible with predictions from dilaton effective theory. In this framework, the σ-meson takes on the role of the dilaton, the Goldstone boson of spontaneously broken scale symmetry. These results support the idea that QCD may be governed by an infrared fixed point and offer a physical interpretation of the D-form factor (or D-term) in the soft limit.