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arXiv 1012.0200hep-lat
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N_f=2+1+1扭曲质量格点量子色动力学的赝标衰变常数

Pseudoscalar decay constants from N_f=2+1+1 twisted mass lattice QCD

Federico Farchioni, Gregorio Herdoiza, Karl Jansen, Marcus Petschlies, Carsten Urbach, ETM collaboration

摘要:

本文给出了N_f=2+1+1味夸克的格点量子色动力学的赝标衰变常数$f_K$、$f_D$和$f_{D_s}$的初步结果。欧洲扭曲质量合作组织(ETMC)使用最大扭曲质量夸克进行了晶格模拟。对于赝标衰变常数,我们采用混合作用量方法,在奇夸克和粲夸克的价区使用所谓的Osterwalder-Seiler费米子。用手征微扰理论分析了两个晶格间距值和几个上/下夸克质量值的数据。

英文摘要:

We present first results for the pseudoscalar decay constants $f_K$, $f_D$ and $f_{D_s}$ from lattice QCD with N_f=2+1+1 flavours of dynamical quarks. The lattice simulations have been performed by the European Twisted Mass collaboration (ETMC) using maximally twisted mass quarks. For the pseudoscalar decay constants we follow a mixed action approach by using so called Osterwalder-Seiler fermions in the valence sector for strange and charm quarks. The data for two values of the lattice spacing and several values of the up/down quark mass is analysed using chiral perturbation theory.

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