Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: DEMNUni: Massive neutrinos and the bispectrum of large scale structures   The main effect of massive neutrinos on the large-scale structure consists in
a few percent suppression of matter perturbations on all scales below their
free-streaming scale. Such effect is of particular importance as it allows to
constraint the value of the sum of neutrino masses from measurements of the
galaxy power spectrum. In this work, we present the first measurements of the
next higher-order correlation function, the bispectrum, from N-body simulations
that include massive neutrinos as particles. This is the simplest statistics
characterising the non-Gaussian properties of the matter and dark matter halos
distributions. We investigate, in the first place, the suppression due to
massive neutrinos on the matter bispectrum, comparing our measurements with the
simplest perturbation theory predictions, finding the approximation of
neutrinos contributing at quadratic order in perturbation theory to provide a
good fit to the measurements in the simulations. On the other hand, as
expected, a linear approximation for neutrino perturbations would lead to
O($f_{\nu}$) errors on the total matter bispectrum at large scales. We then
attempt an extension of previous results on the universality of linear halo
bias in neutrino cosmologies, to non-linear and non-local corrections finding
consistent results with the power spectrum analysis.

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The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
3
The categories of this paper are: physics