Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational Waves from first-order phase transition and domain wall   In many particle physics models, domain wall can form during the phase
transition process after discrete symmetry breaking. We study the scenario
within a complex singlet extended Standard Model framework, where a strongly
first order phase transition can occur depending on the hidden scalar mass and
the mixing between the extra heavy Higgs and the SM Higgs mass. The
gravitational wave spectrum is of a typical two-peak shape, the amplitude and
the peak from the strongly first order phase transition is able to be probed by
the future space-based interferometers, and the one locates around the peak
from the domain wall decay is far beyond the capability of the current PTA, and
future SKA.

9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
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The categories of this paper are: eess
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th