PoS - Proceedings of Science
Volume 334 - The 36th Annual International Symposium on Lattice Field Theory (LATTICE2018) - Hadron Spectroscopy and Interactions
Scattering phase shift determinations from atwo-scalar field theory
D. Darvish,* R. Brett, J. Bulava, J. Fallica, A. Hanlon, C. Morningstar
*corresponding author
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Published on: May 29, 2019
A field theory involving two interacting scalar fields, previously studied by Rummukainen and Gottlieb, is revisited. Our study is not restricted to the limit of large quartic couplings, and a Symanzik-improved action is used so that continuum dispersion relations work well. The Metropolis method, combined with a local microcanonical updating algorithm, is employed in our Monte Carlo calculations. Isotropic lattices ranging from $16^3 \times 48$ to $53^3 \times 48$ are used, and scattering phase shifts are determined using a L\"uscher analysis with multiple partial waves.
DOI: https://doi.org/10.22323/1.334.0070
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