Theta Dependence in Yang-Mills from Holography
1 INFN, Sezione di Firenze;, Via G. Sansone 1, I-50019 Sesto Fiorentino (Firenze), Italy
2 Dipartimento di Fisica e Astronomia, Università di Firenze;, Via G. Sansone 1, I-50019 Sesto Fiorentino (Firenze), Italy
3 Department of Mathematics, University of Surrey, Guildford, GU2 7XH, UK
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Published online: 25 November 2016
In this contribution we review how holographic tools can be used to study the dependence on the CP-breaking θ parameter of various observables in a large Nc Yang-Mills model. Relevant examples are the ground-state energy density, the string tension, the glueball mass spectrum and the critical temperature for deconfinement. These observables have been also studied, in the small θ regime and up to very few powers of θ2, in pure Yang-Mills on the Lattice. The holographic results qualitatively agree with available Lattice data and, being exact in θ, provide benchmarks for higher order corrections.
© The Authors, published by EDP Sciences, 2016
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