Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CMB spectral distortions in generic two-field models   We investigate the CMB $\mu$ distortion in models where two uncorrelated
sources contribute to primordial perturbations. We parameterise each source by
an amplitude, tilt, running and running of the running. We perform a detailed
analysis of the distribution signal as function of the model parameters,
highlighting the differences compared to single-source models. As a specific
example, we also investigate the mixed inflaton-curvaton scenario. We find that
the $\mu$ distortion could efficiently break degeneracies of curvaton
parameters especially when combined with future sensitivity of probing the
tensor-to-scalar ratio $r$. For example, assuming bounds $\mu < 0.5 \times
10^{-8}$ and $r<0.01$, the curvaton contribution should either vanish or the
curvaton should dominate primordial perturbations and its slow-roll parameter
$\eta_{\chi}$ is constrained to the interval $-0.007 < \eta_{\chi}< 0.045$.

36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat