Article

# K^{*} vector and tensor couplings from N_ {f}= 2 twisted mass QCD

(Impact Factor: 4.86). 07/2011; 84(1). DOI: 10.1103/PhysRevD.84.014505
Source: arXiv

ABSTRACT

The mass mK* and vector coupling fK* 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 flavors, 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 mK*=981(33) MeV, fK*=240(18) MeV, and fT(2 GeV)/fV|K*=0.704(41).

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Available from: Federico Mescia, Oct 07, 2015
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