Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An alternative scheme for effective range corrections in pionless EFT   We discuss an alternative scheme for including effective range corrections in
pionless effective field theory. The standard approach treats range terms as
perturbative insertions in the T -matrix. In a finite volume this scheme can
lead to singular behavior close to the unperturbed energies. We consider an
alternative scheme that resums the effective range but expands the spurious
pole of the T -matrix created by this resummation. We test this alternative
expansion for several model potentials and observe good convergence.

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The categories of this paper are: chao-dyn
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The categories of this paper are: cs
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: math
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The categories of this paper are: mtrl-th
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The categories of this paper are: funct-an
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The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: supr-con