Strange magnetic moments of octet baryons under SU(3) breaking

Strange magnetic moments of octet baryons under SU(3) breaking
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SU(3)破断下八位重子的奇异磁矩

DOI:
10.1088/1674-1137/36/5/002
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发表时间:
2012-05
期刊:
影响因子:
3.6
通讯作者:
Chen Hong
Chen Hong
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Cao Lu;Wang Biao;Chen Hong

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利用不可约张量方法,将八重态重子的磁矩参数化到味SU(3)破缺的所有阶,以提取每个味夸克对八重态重子磁矩的贡献。尚未测量到的α 0的磁矩预计为0.649 μN。我们的参数化形式的磁矩是明确的风味依赖,因此每个风味分量的磁矩可以直接通过风味投影算子进行评估。结果表明,核子的奇异磁矩由于核子的等压线反常磁矩很小而被抑制。特别是,核子的奇异磁形状因子是正的,G(s)N(0)= 0.428 μN,这与最近的数据一致。
Magnetic moments of octet baryons are parameterized to all orders of the flavor SU(3) breaking with the irreducible tensor technique in order to extract the contribution of each flavor quark to the magnetic moments of the octet baryons. The not-yet measured magnetic moment of Σ0 is predicted to be 0.649 μN. Our parameterized forms for the magnetic moments are explicitly flavor-dependent, and hence each flavor component of the magnetic moments can be evaluated directly via the flavor projection operator. It is found that the strange magnetic moment of the nucleon is suppressed due to the small isoscalar anomalous magnetic moment of the nucleon. In particular, the strange magnetic form factor of the nucleon turns out to be positive, G(s)N(0) = 0.428 μN, which is consistent with recent data.
DOI: 10.1142/9789814304979_0002
发表时间: 2019-08
期刊: Computers, Rigidity, and Moduli
影响因子: --
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DOI: 10.1016/0375-9474(92)90187-o
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