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arXiv 1407.4967hep-ph
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核子的QCD求和规则与夸克凝聚的非定域性

QCD sum rules for the nucleon and the non-locality of quark condensates

M. G. Ryskin, V. A. Sadovnikova

摘要:

我们强调夸克凝聚的x依赖性的作用<|\bar q(0)q(x)|>起源于瞬子真空中的零费米子模。由于瞬子1/ρ~ 600 MeV的大小与Borel质量M~1GeV的大小相当,所以这种影响是不可忽略的。以核子求和定则为例,我们指出这种“非定域性”可能强烈地影响在<|\bar q(0)q(x)|>=<|\bar q(0)q(0)|> approximation.

英文摘要:

We emphasize the role of the x dependence of the quark condensate <|\bar q(0)q(x)|> originated by the zero fermion modes in the instanton vacuum. The effect is not negligible since the inverse size of the instanton 1/ρ~600MeV is comparable with the value of Borel mass M~1GeV. Using as an example the sum rules for the nucleon we show that this "non-locality" may strongly affected the conventional results obtained under the <|\bar q(0)q(x)|>=<|\bar q(0)q(0)|> approximation.

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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