n-Boson Energies at Finite Volume and Three-Boson Interactions
Silas R. Beane, William Detmold, Martin J. Savage
TL;DR
This paper derives the finite-volume energy dependence of n identical bosons with short-range interactions, enabling more precise extraction of three-boson interactions from lattice QCD data.
Contribution
It provides a systematic calculation of the ground-state energy of n bosons up to order 1/L^6, extending previous finite-volume analyses.
Findings
Derived volume dependence of n-boson energies up to 1/L^6
Facilitates extraction of three-pion interactions from lattice QCD
Enhances understanding of multi-boson finite-volume effects
Abstract
We calculate the volume dependence of the ground-state energy of n identical bosons with short-range repulsive interactions in a periodic spatial volume of side L, up to and including terms of order 1/L^6. With this result, Lattice QCD calculations of the ground-state energies of three or more pions will allow for a systematic extraction of the three-pion interaction at this order in the volume expansion.
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