Particle-dimer approach for the roper resonance in a finite volume
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Publication:6105662
DOI10.1007/JHEP04(2023)100arXiv2212.02171MaRDI QIDQ6105662
Author name not available (Why is that?)
Publication date: 9 June 2023
Published in: (Search for Journal in Brave)
Abstract: We propose a new finite-volume approach which implements two- and three-body dynamics in a transparent way based on an Effective Field Theory Lagrangian. The formalism utilizes a particle-dimer picture and formulates the quantization conditions based on the self-energy of the decaying particle. The formalism is studied for the case of the Roper resonance, using input from lattice QCD and phenomenology. Finally, finite-volume energy eigenvalues are predicted and compared to existing results of lattice QCD calculations. This crucially provides initial guidance on the necessary level of precision for the finite-volume spectrum.
Full work available at URL: https://arxiv.org/abs/2212.02171
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