画出介子和质子的质量分布

IF 4.5 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics Letters B Pub Date : 2025-01-21 DOI:10.1016/j.physletb.2025.139280

Xiaobin Wang (王晓斌) , Zanbin Xing (幸瓒彬) , Lei Chang (常雷) , Minghui Ding (丁明慧) , Khépani Raya , Craig D. Roberts

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引用次数: 0

摘要

在不参考深度虚康普顿散射数据的情况下，利用光前全息模型说明了由价夸克分布函数（DF）和电磁形状因子（FH）构造强子零偏态广义部子分布（GPD）的代数方案。由GPD计算出的强子质量分布引力形式因子AH比FH更难；而且，对于每个强子，相关的质量密度分布比类似的电荷分布更紧凑，每个介子的近核密度都大于它的质子伙伴。这些特征与所采用的方案无关。

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Sketching pion and proton mass distributions

A light-front holographic model is used to illustrate an algebraic scheme for constructing a representation of a hadron's zero-skewness generalised parton distribution (GPD) from its valence-quark distribution function (DF) and electromagnetic form factor,

F_{H}

, without reference to deeply virtual Compton scattering data. The hadron's mass distribution gravitational form factor,

A_{H}

, calculated from this GPD is harder than

F_{H}

; and, for each hadron, the associated mass-density profile is more compact than the analogous charge profile, with each pion near-core density being larger than that of its proton partner. These features are independent of the scheme employed.

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来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.