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Kaon-kaon scattering at maximal isospin from $N_f=2+1+1$ twisted mass lattice QCD

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arxiv 1611.09584 v1 pith:JMADJXPR submitted 2016-11-29 hep-lat

Christopher Helmes , Christian Jost , Bastian Knippschild , Bartosz Kostrzewa , Liuming Liu , Carsten Urbach , Markus Werner This is my paper
classification hep-lat
keywords latticeisospinmassesmaximalquarkresultsscatteringvalues
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abstract

We present results for the interaction of two kaons at maximal isospin. The calculation is based on 2+1+1 flavour gauge configurations generated by the ETM Collaboration (ETMC) featuring pion masses ranging from about 230 MeV to 450 MeV at three values of the lattice spacing. The elastic scattering length $a_0^{I=1}$ is calculated at several values of the bare strange quark and light quark masses. We find $M_K a_0 =-0.397(11)(_{-8}^{+0})$ as the result of a chiral and continuum extrapolation to the physical point. This number is compared to other lattice results.

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