Heavy-light current-current correlators

Understand

The current-current correlator method has been used successfully to obtain very accurate results for quark masses and the coupling alpha_s.

• 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.