Sonderseminar Chris Culver (Universität Liverpool)

The a1(1260) resonance from Lattice QCD

We report the first determination of universal parameters of the axial a1(1260) resonance from lattice QCD. The finite-volume energy levels are obtained in this channel using two and three particle operators. The energies are then fed through a three-body quantization condition (FVU) which then determines the infinite-volume scattering amplitude. Subsequently, pole position and residua of the three-body resonance are extracted on the second Riemann sheet and compared to the phenomenological ones.

 

Seminarraum I HISKP, Raum 1.021

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