Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational waves from chiral phase transition in a conformally
  extended standard model   The gravitational wave (GW) background produced at the cosmological chiral
phase transition in a conformal extension of the standard model is studied. To
obtain the bounce solution of coupled field equations we implement an iterative
method. We find that the corresponding $O(3)$ symmetric Euclidean action $S_3$
divided by the temperature $T$ has a simple behavior near the critical
temperature $T_C$: $S_3/T \propto (1-T/T_C)^{-\gamma}$, which is subsequently
used to determine the transition's inverse duration $\beta$ normalized to the
Hubble parameter $H$. It turns out that $\beta/H \gtrsim 10^3$, implying that
the sound wave period $\tau_\text{sw}$ as an active GW source, too, can be much
shorter than the Hubble time. We therefore compute $\tau_\text{sw} H$ and use
it as the reduction factor for the sound wave contribution. The signal-to-noise
ratio (SNR) for Deci-Hertz Interferometer Gravitational Wave Observatory
(DECIGO) and Big Bang Observer (BBO) is evaluated, with the result:
SNR$^\text{DECIGO} \lesssim 1.2$ and SNR$^\text{BBO} \lesssim 12.0$ for five
years observation, from which we conclude that the GW signal predicted by the
model in the optimistic case could be detected at BBO.

22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs