K* vector and tensor couplings from Nf = 2 tmQCD

P. Dimopoulos; F. Mescia; A. Vladikas

doi:10.1103/PhysRevD.84.014505

K* vector and tensor couplings from Nf = 2 tmQCD

High Energy Physics - Lattice 2011-08-09 v1 High Energy Physics - Phenomenology

Authors: P. Dimopoulos , F. Mescia , A. Vladikas

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Abstract

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).

Keywords

lattice qcd quark masses

Cite

@article{arxiv.1104.0188,
  title  = {K* vector and tensor couplings from Nf = 2 tmQCD},
  author = {P. Dimopoulos and F. Mescia and A. Vladikas},
  journal= {arXiv preprint arXiv:1104.0188},
  year   = {2011}
}

Comments

1+11 pages

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