resonances on the lattice at nearly physical quark masses and N f = 2
نویسندگان
چکیده
Working with a pion mass mπ ≈ 150 MeV, we study ππ and Kπ scattering using two flavours of non-perturbatively improved Wilson fermions at a lattice spacing a ≈ 0.071 fm. Employing two lattice volumes with linear spatial extents of Ns = 48 and Ns = 64 points and moving frames, we extract the phase shifts for p-wave ππ and Kπ scattering near the ρ and K∗ resonances. Comparing our results to those of previous lattice studies, that used pion masses ranging from about 200 MeV up to 470 MeV, we find that the coupling gρππ appears to be remarkably constant as a function of mπ.
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