Relatore
Claudio Bonanno
(University of Pisa and INFN - Pisa section)
Descrizione
We measured the theta-dependence of the vacuum energy density of the CP^(N-1) model up to O(theta^6) for N = 15, 21, 26 and 31 using Monte Carlo simulations.
We then extrapolated the large-N limit of the topological susceptibility chi and of the higher-order coefficients b_2 and b_4 and compared it with the analytic results. In particular, we compared the leading term of the 1/N expansion of these observables and, for the topological susceptibility, the next-to-leading-order term too.
Autore principale
Claudio Bonanno
(University of Pisa and INFN - Pisa section)
