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Original language | English |
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Pages (from-to) | - |

Number of pages | 11 |

Journal | Journal of High Energy Physics |

Volume | 2002 |

Issue number | 08 |

DOIs | |

State | Published - 16 Apr 2002 |

We study the $\theta$ dependence of four-dimensional SU($N$) gauge theories, for $N\geq 3$ and in the large-N limit. We use numerical simulations of the Wilson lattice formulation of gauge theories to compute the first few terms of the expansion of the ground-state energy $F(\theta)$ around $\theta=0$, $F(\theta)-F(0) = A_2 \theta^2 (1 + b_2 \theta^2 + ...)$. Our results support Witten's conjecture: $F(\theta)-F(0) = {\cal A} \theta^2 + O(1/N)$ for sufficiently small values of $\theta$, $\theta

- hep-th, hep-lat, Nonperturbative Effects, 1/N Expansion, Lattice Gauge Field Theories

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ID: 1661982