出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We outline a strategy to compute the second-loop contribution to the cSW coefficient of the
Sheikoleslami-Wohlert-Wilson fermion action by means of NSPT. We also present preliminary
results for higher-order integrators for the Langevin evolution within NSPT. At fixed numerical
accuracy, these integrators considerably reduce the required computer-time.
