%0 Journal Article
%T Relativistic N-particle energy shift in finite volume
%A Romero-Lopez, F.
%A Rusetsky, A.
%A Schlage, N.
%A Urbach, C.
%J Journal of High Energy Physics
%D 2021
%V 02
%N 2
%I Springer
%@ 1029-8479
%G English
%F Romero-Lopez_etal2021
%O WOS:000617678000002
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4711), last updated on Wed, 03 Mar 2021 12:50:42 +0000
%X We present a general method for deriving the energy shift of an interacting system of N spinless particles in a finite volume. To this end, we use the nonrelativistic effective field theory (NREFT), and match the pertinent low-energy constants to the scattering amplitudes. Relativistic corrections are explicitly included up to a given order in the 1/L expansion. We apply this method to obtain the ground state of N particles, and the first excited state of two and three particles to order L-6 in terms of the threshold parameters of the two- and three-particle relativistic scattering amplitudes. We use these expressions to analyze the N-particle ground state energy shift in the complex phi (4) theory.
%K Lattice QCD
%K Lattice Quantum Field Theory
%R 10.1007/JHEP02(2021)060
%U https://arxiv.org/abs/2010.11715
%U https://doi.org/10.1007/JHEP02(2021)060
%P 060-52pp