Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Renormalization of chiral two-pion exchange NN interactions with
  Delta-excitations: Central Phases and the Deuteron   The renormalization of the chiral np interaction with Delta-excitations in
intermediate states is considered at next-to-leading order (NLO) and
next-to-next-to-leading order (N2LO) for central waves. The inclusion of the
Delta-excitation as an explicit degree of freedom improves the convergence
properties of the effective field theory results for np scattering with respect
to Delta-less theory, and allows the existence of a deuteron bound state in the
infinite cut-off limit. The 1S_0 singlet and 3S_1 triplet phase shifts
reproduce data for p ~ m_pi. The role of spectral function regularization is
also discussed.

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The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol