Dresden 2013 – scientific programme

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T: Fachverband Teilchenphysik

T 22: Gittereichtheorie

T 22.3: Talk

Monday, March 4, 2013, 17:15–17:30, WIL-C129

First results for pseudoscalar decay constants of D-mesons from Nf = 2 + 1 + 1 twisted mass Lattice-QCD — •Andreas Nube — DESY in Zeuthen, Platanenallee 6, 15738 Zeuthen

The aim of this project is to calculate a theoretical estimate of the D_s-meson decay constant fDs in the framework of lattice-QCD with a chirally rotated mass term and four dynamic quark flavours (up, down, strange and charm). A comprehensive set of gauge configurations has been produced with high input on super-computers across Europe. Data from three different lattice spacings is available with four to eight different light quark masses each. HMXPT is used to extrapolate the estimates of fDs to the physical point. First determinations indicate a good agreement with both, former lattice determinations and experimental measurements.