Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: String Fragmentation in Supercooled Confinement and Implications for
  Dark Matter   A strongly-coupled sector can feature a supercooled confinement transition in
the early universe. We point out that, when fundamental quanta of the strong
sector are swept into expanding bubbles of the confined phase, the distance
between them is large compared to the confinement scale. We suggest a modelling
of the subsequent dynamics and find that the flux linking the fundamental
quanta deforms and stretches towards the wall, producing an enhanced number of
composite states upon string fragmentation. The composite states are highly
boosted in the plasma frame, which leads to additional particle production
through the subsequent deep inelastic scattering. We study the consequences for
the abundance and energetics of particles in the universe and for bubble-wall
Lorentz factors. This opens several new avenues of investigation, which we
begin to explore here, showing that the composite dark matter relic density is
affected by many orders of magnitude.

18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th