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arXiv 1410.2010hep-ph
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强子中某些质量分裂的味普适性

The flavor universality of some mass splittings in hadrons

S. S. Afonin

摘要:

已知双味QCD的近似手征不变性是自发破缺的。这种效应解释了相对较小的π介子质量,也解释了人们普遍认为的可能是手征伙伴的质量分裂--手征伙伴是自旋相等但宇称相反的强子,位于手征对称性的多重态中。我们目前的实验证据表明,在现实中,这种介子部门的质量分裂似乎是近似的味道无关的所有情况下,他们可以通过实验测试-自旋0和1。此外,对于自旋$1/2$重子(即在至少一个夸克不是$u$或$d$ 1的状态之间),部分味独立性成立。这一性质可以预测10个新强子的质量和量子数。一些有趣的后果进行了讨论。

英文摘要:

The approximate chiral invariance of the two-flavor QCD is known to be spontaneously broken. This effect explains the relatively small pion mass and, as is widely believed, the mass splittings of would-be chiral partners --- the hadrons of equal spin but opposite parity lying in one multiplet of the chiral symmetry. We present experimental evidences that in reality such mass splittings in the meson sector seem to be approximately flavor-independent in all cases where they can be tested experimentally --- the spin 0 and 1. In addition, a partial flavor independence holds for spin $1/2$ baryons (namely among states in which at least one of quarks is not $u$ or $d$ one). This property allows to predict masses and quantum numbers for 10 new hadrons. Some interesting consequences are discussed.

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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