Particle-dimer approach for the Roper resonance in a finite volume

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 parti...

وصف كامل

التفاصيل البيبلوغرافية
الحاوية / القاعدة:Journal of High Energy Physics
المؤلفون الرئيسيون: Daniel Severt, Maxim Mai, Ulf-G. Meißner
التنسيق: مقال
اللغة:الإنجليزية
منشور في: SpringerOpen 2023-04-01
الموضوعات:
Hadronic Spectroscopy
Structure and Interactions
Effective Field Theories of QCD
Properties of Hadrons
الوصول للمادة أونلاين:https://doi.org/10.1007/JHEP04(2023)100
الوصف
الملخص: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.
تدمد:1029-8479

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