Nf = 2 tmQCD的K* 向量和张量耦合
K* vector and tensor couplings from Nf = 2 tmQCD
摘要：
K ~* 介子的质量m_K ~* 和矢量耦合f_K ~*，以及张量与矢量耦合的比值fT/fV|_K*，在格点量子色动力学中计算。我们的模拟是在一个部分淬火的设置，两个动力学（海）威尔逊夸克的味道，具有最大扭曲的质量项。价夸克可以是标准夸克，也可以是Osterwalder-Seiler最大扭曲夸克。在三种晶格间距下得到的结果外推到连续谱，得到m_K ~* = 981（33）MeV，f_K ~* = 240（18）MeV和fT（2GeV）/fV|_K* = 0.704（41）。
英文摘要：
The mass m_K* and vector coupling f_K* of the K*-meson, as well as the ratio of the tensor to vector couplings fT/fV|_K*, are computed in lattice QCD. Our simulations are performed in a partially quenched setup, with two dynamical (sea) Wilson quark flavours, having a maximally twisted mass term. Valence quarks are either of the standard or the Osterwalder-Seiler maximally twisted variety. Results obtained at three values of the lattice spacing are extrapolated to the continuum, giving m_K* = 981(33) MeV, f_K* = 240(18) MeV and fT(2 GeV)/fV|_K* = 0.704(41).
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