From 4d Yang-Mills to 2d ℂℙN − 1 model: IR problem and confinement at weak coupling

Masahito Yamazaki, Kazuya Yonekura

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42 Citations (Scopus)


We study four-dimensional SU(N) Yang-Mills theory on ℝ×T3=ℝ×SA1×SB1×SC1, with a twisted boundary condition by a ℤN center symmetry imposed on SB 1 × SC 1. This setup has no IR zero modes and hence is free from IR divergences which could spoil trans-series expansion for physical observables. Moreover, we show that the center symmetry is preserved at weak coupling regime. This is shown by first reducing the theory on T2= SA× SB , to connect the model to the two-dimensional ℂℙN− 1-model. Then, we prove that the twisted boundary condition by the center symmetry for the Yang-Mills is reduced to the twisted boundary condition by the ℤN global symmetry of ℂℙN− 1. There are N classical vacua, and fractional instantons connecting those N vacua dynamically restore the center symmetry. We also point out the presence of singularities on the Borel plane which depend on the shape of the compactification manifold, and comment on its implications.

Original languageEnglish
Article number88
JournalJournal of High Energy Physics
Issue number7
Publication statusPublished - Jul 1 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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