Heavy-light meson in anisotropic lattice QCD

✍ Scribed by H. Matsufuru; J. Harada; T. Onogia; A. Sugita

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 279 KB
• Volume: 119
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(03)01634-7

✦ Synopsis

We examine whether the O(a) improved quark action on anisotropic lattices can be used as a framework for the heavy quark, which enables precision computation of matrix elements of heavy-light mesons. To this end, it is crucial to verify that a mass independent and nonperturbative tuning of the parameters is possible. As a first step, we observe the dispersion relation of heavy-light mesons on a quenched lattice using the action which is nonperturbatively tuned only for the leading terms. On a lattice with the spatial cutoff a,' z 1.6 GeV and the anisotropy < = 4, the relativity relation holds within 2% accuracy in the quark mass region u,mQ < 1.2 with the bare anisotropy parameter tuned for the massless quark. We also apply the action to a calculation of heavy-light decay constants in the charm quark mass region