Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Medium Effects in Parton Distributions   Understanding the effects of a background hadronic medium on hadronic
observables is important in the context of hadron structure. Many experiments
probing nucleon structure make use of nuclear targets and unraveling the
modifications that ensue is a complex task. Using lattice QCD, we investigate
the ab initio computation of hadron structure in a medium, focusing on the
structure of the pion in a Bose-condensed gas of pions.

18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol