Speaker
Zi-Yu Wang
(Peking University)
Description
We determined the proton-proton fusion matrix element and constrained the corresponding low energy constant L_{1,A} in the pionless EFT at a pion mass of 432 MeV. To control the systematics, we employed both bilocal and hexaquark interpolation operators. Given that the two-nucleon system at unphysical pion mass is likely to be a shallow bound state or scattering state, the finite volume effects are not negligible. We estimated its finite volume correction by using the two-nucleon spectrum obtained from our lattice data.
Author
Zi-Yu Wang
(Peking University)