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Pi-Pi Scattering with Nf=2+1+1 Twisted Mass Fermions

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arxiv 1412.0408 v1 pith:FZCHX3V5 submitted 2014-12-01 hep-lat

Christopher Helmes , Christian Jost , Bastian Knippschild , Liuming Liu , Carsten Urbach , Markus Werner This is my paper
classification hep-lat
keywords scatteringfermionsfinitemassmethodpi-pitwistedchannel
verification ladder T0 review T1 audit T2 compute T3 formal
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Pi-Pi scattering is investigated for the first time for Nf=2+1+1 dynamical quark flavours using Wilson twisted mass fermions. L\"uscher's finite size method is used to relate energy shifts in finite volume to scattering quantities like the scattering length in the I=2 channel. The computation is performed at several pion masses and lattice spacings utilising the stochastic LapH method.

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