Massive Schwinger model with SU(2)f on the light cone.
Massive Schwinger model with SU(2)f on the light cone.
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光锥上带有 SU(2)f 的大型施温格模型。
DOI：
10.1103/physrevd.49.4226
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
M. Yahiro
中科院分区：
文献类型：
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作者：
Koji Harada;Takanori Sugihara;Masa;M. Yahiro
利用Tamm-Dancoff近似，在强耦合区研究了具有两种味道的有质量Schwinger模型。最轻粒子的质谱数值计算。我们发现，最轻的等重线（π介子“）的质量表现为强耦合的[ital m][sup 0.50]，其中[ital m]是费米子质量。我们还发现，最轻的等单线态不是在强耦合区重得多的价态（[η π“），而是两个π介子的束缚态.它比π介子重1.762倍，[ital m]=1.0[times]10[sup [minus]3]（[ital e]/ [radical][pi]），而科尔曼预测在强耦合极限下，这个比值是[radical]3。π介子衰变常数计算为0.3945。
The massive Schwinger model with two flavors is studied in the strong coupling region by using the light-front Tamm-Dancoff approximation. The mass spectrum of the lightest particles is obtained numerically. We find that the mass of the lightest isotriplet ( pion'') behaves as [ital m][sup 0.50] for strong coupling, where [ital m] is the fermion mass. We also find that the lightest isosinglet is not in the valence state ( [eta]'') which is much heavier in the strong coupling region, but can be interpreted as a bound state of two pions. It is 1.762 times heavier than the pion at [ital m]=1.0[times]10[sup [minus]3]([ital e]/ [radical][pi] ), while Coleman predicted that the ratio is [radical]3 in the strong coupling limit. The pion decay constant'' is calculated to be 0.3945.