标题： 手征相变在具有U(1)规范对称性的格点费米子-规范-标量模型中 显示英文标题

标题： Chiral phase transition in a lattice fermion--gauge--scalar model with U(1) gauge symmetry

摘要： 手征相变由带电标量场在具有U(1)规范对称性的格点费米子-规范-标量模型中被数值研究，该模型最近被提出作为动态费米子质量生成的模型。 对于非常强的规范耦合，相变是二阶的，其标度性质与Nambu--Jona-Lasinio模型的非常相似。 然而，在稍弱耦合下的三临界点附近，相变的顺序发生变化，此时标度行为不同。 因此，在这一点上研究模型的连续极限是有价值的。 显示英文摘要

摘要： The chiral phase transition induced by a charged scalar field is investigated numerically in a lattice fermion-gauge-scalar model with U(1) gauge symmetry, proposed recently as a model for dynamical fermion mass generation. For very strong gauge coupling the transition is of second order and its scaling properties are very similar to those of the Nambu--Jona-Lasinio model. However, in the vicinity of the tricritical point at somewhat weaker coupling, where the transition changes the order, the scaling behavior is different. Therefore it is worthwhile to investigate the continuum limit of the model at this point.