Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Resummation of in-medium ladder diagrams: s-wave effective range and
  p-wave interaction   A recent work on the resummation of fermionic in-medium ladder diagrams to
all orders is extended by considering the effective range correction in the
s-wave interaction and a (spin-independent) p-wave contact-interaction. A
two-component recursion generates the in-medium T-matrix at any order when
off-shell terms spoil the factorization of multi-loop diagrams. The resummation
to all orders is achieved in the form of a geometrical series for the
particle-particle ladders, and through an arctangent-function for the combined
particle-particle and hole-hole ladders. One finds that the effective range
correction changes the results in the limit of large scattering length
considerably, with the effect that the Bertsch parameter $\xi_n$ nearly
doubles. Applications to the equation of state of neutron matter at low density
are also discussed. For the p-wave contact-interaction the resummation to all
orders is facilitated by decomposing tensorial loop-integrals with a
transversal and a longitudinal projector. The enhanced attraction provided by
the p-wave ladder series has its origin mainly in the coherent sum of Hartree
and Fock contributions.

8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph