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Instanton effects vs resurgence in the O(3) sigma model

We investigate the ground-state energy of the integrable two dimensional O(3) sigma model in a magnetic field. By determining a large number of perturbative coefficients we explore the closest singularities of the corresponding Borel function. We then confront its median resummation to the high prec...

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Egile Nagusiak: Zoltán Bajnok, János Balog, Árpád Hegedűs, István Vona
Formatua: Artigo
Hizkuntza:Inglês
Argitaratua: Elsevier 2022-06-01
Saila:Physics Letters B
Sarrera elektronikoa:http://www.sciencedirect.com/science/article/pii/S0370269322002076
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