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arXiv 0810.4234hep-ph
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QCD真空中手征对称性的自发破缺是重子质量的来源,决定了重子的磁矩等静态性质

Spontaneous violation of chiral symmetry in QCD vacuum is the origin of baryon masses and determines baryon magnetic moments and their other static properties

B. L. Ioffe

摘要:

本文对QCD真空中手征对称性的自发破缺作了简要的评述。证明了这一现象是QCD中重子质量的起源。本文计算了核子质量、超子质量和重子共振质量,并主要用夸克凝聚的质量-- $<0\mid \bar{q} q \mid 0>, ~q=u,d,s$ --真空期望值(v. e. v.)夸克场引入了外场诱导真空期望值的概念。结果表明,静态电磁场引起的这种v. e. v.导致夸克凝聚磁化率的产生,它在确定重子磁矩中起主要作用。计算了质子、中子和超子的磁矩。给出了重子八重态$β$衰变常数的计算结果。

英文摘要:

A short review is presented of the spontaneous violation of chiral symmetry in QCD vacuum. It is demonstrated, that this phenomenon is the origin of baryon masses in QCD. The value of nucleon mass is calculated as well as the masses of hyperons and some baryonic resonances and expressed mainly through the values of quark condensates -- $<0\mid \bar{q} q \mid 0>, ~q=u,d,s$ -- the vacuum expectation values (v.e.v.) of quark field. The concept of vacuum expectation values induced by external fields is introduced. It is demonstrated that such v.e.v. induced by static electromagnetic field results in quark condensate magnetic susceptibility, which plays the main role in determination of baryon magnetic moments. The magnetic moments of proton, neutron and hyperons are calculated. The results of calculation of baryon octet $β$-decay constants are also presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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