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Energy shift of the three-particle system in a finite volume

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arxiv 1902.01111 v3 pith:CFJNQP6I submitted 2019-02-04 hep-lat hep-ph

Energy shift of the three-particle system in a finite volume

classification hep-lat hep-ph
keywords lowestthree-particleobtainedparticle-dimershiftstateenergyincluding
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Using the three-particle quantization condition recently obtained in the particle-dimer framework, the finite-volume energy shift of the two lowest three-particle scattering states is derived up to and including order $L^{-6}$. Furthermore, assuming that a stable dimer exists in the infinite volume, the shift for the lowest particle-dimer scattering state is obtained up to and including order $L^{-3}$. The result for the lowest three-particle state agrees with the results from the literature, and the result for the lowest particle-dimer state reproduces the one obtained by using the Luescher equation.

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