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How to renormalize integral equations with singular potentials in effective field theory

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arxiv 2001.07040 v2 pith:P4DWKWAM submitted 2020-01-20 nucl-th hep-phhep-th

E. Epelbaum , A. M. Gasparyan , J. Gegelia , Ulf-G. Mei{ss}ner , X.-L. Ren This is my paper · ORCID
classification nucl-thhep-phhep-th
keywords fieldeffectivesingulartheoryapplicationequationsintegralpotentials
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We briefly review general concepts of renormalization in quantum field theory and discuss their application to solutions of integral equations with singular potentials in the few-nucleon sector of the low-energy effective field theory of QCD. We also describe a particular subtractive renormalization scheme and consider a specific application to a toy-model with a singular potential serving as its effective field theoretical leading-order approximation.

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  1. Resonance parameters of the vector charmoniumlike state $G(3900)$

    hep-ph 2025-04 conditional novelty 6.0 of 10

    A coupled-channel fit to e+e- to D meson pairs finds that G(3900) is a dynamically generated P-wave D Dbar* resonance.

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