Neutron Matter in the Unitary Limit with Implicit Renormalization of Short Range Interactions
Tipo
Artigo de evento
Data de publicação
2020
Periódico
Springer Proceedings in Physics
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0
Autores
Ruiz Arriola E.
Szpigel S.
Timoteo V.S.
Szpigel S.
Timoteo V.S.
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Resumo
© Springer Nature Switzerland AG 2020.We study a strongly interacting many-fermion system in the unitary limit using an implicit renormalization framework and compute the Bertsch parameter (formula presented) considering only contact interactions. The main ingredient of the calculation is the scale separation between low and high momentum degrees of freedom, which we take as the Fermi momentum (formula presented), and the assumption that the physics below this momentum scale can be re-parametrized into the low energy coefficients of the contact interactions. Once the unitary renormalization conditions are imposed on the two-body scattering amplitude obtained from the contact interactions, we evaluate (formula presented) at leading order (LO), next-to-leading order (NLO) and next-to-next-to-leading order (NNLO).
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Assuntos Scopus
Contact interaction , Energy coefficients , Fermion systems , Next to next to leading orders , Next-to-leading orders , Scale separation , Short range interactions , Two-body scattering