TY  - JOUR
AU  - Romero-Lopez, F.
AU  - Rusetsky, A.
AU  - Schlage, N.
AU  - Urbach, C.
PY  - 2021
DA  - 2021//
TI  - Relativistic N-particle energy shift in finite volume
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 060
EP  - 52pp
VL  - 02
IS  - 2
PB  - Springer
KW  - Lattice QCD
KW  - Lattice Quantum Field Theory
AB  - 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.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2010.11715
UR  - https://doi.org/10.1007/JHEP02(2021)060
DO  - 10.1007/JHEP02(2021)060
LA  - English
N1  - WOS:000617678000002
ID  - Romero-Lopez_etal2021
ER  -