Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Diquarks and Density   We describe aspects of the role that diquark correlations play in
understanding baryon structure and interactions. The significance of diquarks
in that application motivates a study of the possibility that dense hadronic
matter may exhibit diquark condensation; i.e., quark-quark pairing promoted by
a quark chemical potential. A Gorkov-Nambu-like gap equation is introduced for
QCD and analysed for 2-colour QCD (QC2D) and, in two qualitatively different
truncations, for QCD itself. Among other interesting features, we illustrate
that QC2D with massive fermions undergoes a second-order transition to a
superfluid phase when the chemical potential exceeds 0.5 m.pi. In the QCD
application we illustrate that the sigma= <bar-q q> .neq. 0 phase, which
determines the properties of the mass spectrum at zero temperature and chemical
potential, is unstable with respect to the superfluid phase when the chemical
potential exceeds approx. 2 sigma, and that at this point the diquark gap is
large, approx. 0.5 sigma. The superfluid phase survives to temperatures greater
than that expected in the core of compact stars.

25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph