Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiple parton interactions and forward double pion production in pp
  and dA scattering   We estimate the contributions by double-parton interactions to the cross
sections for pp->pi^0 pi^0 X and dA->pi^0 pi^0 X at RHIC. We find that such
contributions become important at large forward rapidities of the produced
pions. This is in particular the case for dA scattering, where they strongly
enhance the azimuthal-angular independent "pedestal" component of the cross
section, providing a natural explanation of this feature of the RHIC dA data.
We argue that the discussed processes open a window to studies of double quark
distributions in nucleons. We also briefly address the roles of shadowing and
energy loss in dA scattering, which we show to affect the double-inclusive pion
cross section much more strongly than the single-inclusive one. We discuss the
implications of our results for the interpretation of pion azimuthal
correlations.

31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin