出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The current-current correlator method has been used successfully to obtain very accurate results for quark masses and the coupling as. The calculations were done using Highly Improved Staggered Quarks (HISQ) and heavy-heavy meson correlators. We now extend this work to the significantly more challenging heavy-light case, reporting the first results here. The aim is to determine nonperturbative Z factors for NRQCD heavy-light currents, but first we test the method in the HISQ case where Z = 1.
