Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Role of the Delta(1232) in pion-deuteron scattering at threshold within
  chiral effective field theory   We investigate the role of the delta isobar in the reaction $\pi d\to \pi d$
at threshold in chiral effective field theory. We discuss the corresponding
power counting and argue that this calculation completes the evaluation of
diagrams up to the order (m_pi/M_N)^(3/2), with m_pi (M_N) for the pion
(nucleon) mass. The net effect of all delta contributions at this order to the
pion-deuteron scattering length is (2.4 +/- 0.4)x 10^(-3) m_pi^{-1}.

28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an