Nuclear Physics B ( IF 2.8 ) Pub Date : 2020-09-16 , DOI: 10.1016/j.nuclphysb.2020.115177 O. Borisenko , V. Chelnokov , S. Voloshyn
The standard and integrals are calculated in the large N limit. Our main finding is that for an important class of integrals this limit is different for two groups. We describe the critical behaviour of models and discuss implications of our results for the large N behaviour of lattice gauge theories at finite temperatures and non-zero baryon chemical potential. The key ingredients of our approach are 1) expansion of the integrals into a sum over irreducible representations and 2) calculation of sums over partitions of r of products of dimensions of two different representations of a symmetric group .
中文翻译:
晶格模型中SU(N)积分的大N极限。
标准 和 积分是在较大的N极限内计算的。我们的主要发现是,对于一类重要的积分,两组的限值不同。我们描述了建模并讨论我们的结果对N的大N行为的影响有限温度和非零重子化学势的晶格规理论。我们方法的关键要素是:1)将积分扩展为不可约表示的和;以及2)计算对称组的两个不同表示的维度的乘积r的分区上的和的计算。