Criterion for dynamical chiral symmetry breaking

被引：0
|
作者：
Jain, Bithika [1 ]
Mitra, Indrajit [2 ]
Sharatchandra, H. S. [3 ]
机构：
[1] St Xavier Coll, Mahapalika Marg, Bombay 400001, Maharashtra, India
[2] Saha Inst Nucl Phys, Theory Grp, Kolkata 700064,, India
[3] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India
来源：
THEORETICAL HIGH ENERGY PHYSICS | 2007年 / 939卷
关键词：
Bethe-Salpeter equation; dynamical chiral symmetry breaking;
D O I：
暂无
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The Bethe-Salpeter equation for massless fermions is related to a generalized quantum-mechanical Hamiltonian. The presumed vacuum is unstable when this Hamiltonian possesses a negative energy eigenstate. It is shown that an arbitrarily weak long-range attraction leads to chiral symmetry breaking, except in the scale-invariant case when the instability occurs at a critical value of the coupling. For the case of short-range attraction, an upper bound for the critical coupling is obtained.
引用
收藏
页码：355 / +
页数：2
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