Step toward estimation of the neutral-hadron size: The gravitational mass radius of π0 meson in a relativistic theory of composite particles

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy Physical Review D Pub Date : 2025-02-24 DOI:10.1103/physrevd.111.034034

A. F. Krutov, V. E. Troitsky

{"title":"Step toward estimation of the neutral-hadron size: The gravitational mass radius of π0 meson in a relativistic theory of composite particles","authors":"A. F. Krutov, V. E. Troitsky","doi":"10.1103/physrevd.111.034034","DOIUrl":null,"url":null,"abstract":"We extend our nonperturbative essentially relativistic approach, elaborated previously, to perform an approximate estimation of the size of π</a:mi></a:mrow>0</a:mn></a:msup></a:mrow></a:math> meson. We present detailed argumentation for choosing the mass mean square radius (mass MSR) for this purpose. Its value calculated in our approach, using three model quark-antiquark wave functions in pion, is <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mo stretchy=\"false\">(</c:mo><c:mn>0.5</c:mn><c:mo>–</c:mo><c:mn>0.53</c:mn><c:mo stretchy=\"false\">)</c:mo><c:mtext> </c:mtext><c:mtext> </c:mtext><c:mi>fm</c:mi></c:math>. The neutral-pion electromagnetic form factor is zero in accordance with the charge-conjugation symmetry. We demonstrate ambiguities encountered when using standard definitions of mechanical MSR for the size. We discuss MSRs obtained in various approaches and their comparison with each other and with our results. Published by the American Physical Society 2025 ","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"27 1","pages":""},"PeriodicalIF":5.3000,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Review D","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1103/physrevd.111.034034","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Physics and Astronomy","Score":null,"Total":0}

引用次数: 0

Abstract

We extend our nonperturbative essentially relativistic approach, elaborated previously, to perform an approximate estimation of the size of π0 meson. We present detailed argumentation for choosing the mass mean square radius (mass MSR) for this purpose. Its value calculated in our approach, using three model quark-antiquark wave functions in pion, is (0.5–0.53) fm. The neutral-pion electromagnetic form factor is zero in accordance with the charge-conjugation symmetry. We demonstrate ambiguities encountered when using standard definitions of mechanical MSR for the size. We discuss MSRs obtained in various approaches and their comparison with each other and with our results.

Published by the American Physical Society

2025

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

迈向估计中性强子大小的一步：复合粒子相对论理论中π0介子的引力质量半径

我们扩展了先前阐述的非微扰本质相对论方法，以执行π0介子大小的近似估计。为此，我们提出了选择质量均方半径（质量MSR）的详细论证。在我们的方法中，使用介子中的三个模型夸克-反夸克波函数计算其值为（0.5-0.53）fm。根据电荷共轭对称性，中性介子电磁形状因子为零。我们演示了在使用机械MSR的标准定义时遇到的歧义。我们讨论了各种方法得到的msr，以及它们之间的比较和与我们的结果的比较。2025年由美国物理学会出版

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.