We report on a precise computation of the topological charge distribution in the SU(3) Yang-Mills theory. It is carried out on the lattice with high statistics Monte Carlo simulations by employing the definition of the topological charge suggested by Neuberger's fermions. We observe significant deviations from a Gaussian distribution. Our results disfavor the θ behavior of the vacuum energy predicted by dilute instanton models, while they are compatible with the expectation from the large Nc expansion.

Giusti, L., Petrarca, S., Taglienti, B. (2007). θ dependence of the vacuum energy in SU(3) gauge theory from the lattice. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 76(9) [10.1103/PhysRevD.76.094510].

θ dependence of the vacuum energy in SU(3) gauge theory from the lattice

Giusti, L;
2007

Abstract

We report on a precise computation of the topological charge distribution in the SU(3) Yang-Mills theory. It is carried out on the lattice with high statistics Monte Carlo simulations by employing the definition of the topological charge suggested by Neuberger's fermions. We observe significant deviations from a Gaussian distribution. Our results disfavor the θ behavior of the vacuum energy predicted by dilute instanton models, while they are compatible with the expectation from the large Nc expansion.
Articolo in rivista - Articolo scientifico
field theory, gauge theory, lattice, topology
English
2007
76
9
094510
none
Giusti, L., Petrarca, S., Taglienti, B. (2007). θ dependence of the vacuum energy in SU(3) gauge theory from the lattice. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 76(9) [10.1103/PhysRevD.76.094510].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/24679
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