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Paper detail

K* vector and tensor couplings from Nf = 2 tmQCD

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).

preprint2011arXivOpen access
P. DimopoulosF. MesciaA. Vladikas
hep-phhep-lat
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P. DimopoulosF. MesciaA. Vladikas

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