Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Matter bispectrum beyond Horndeski   The Horndeski scalar-tensor theory and its recent extensions allow nonlinear
derivative interactions of the scalar degree of freedom. We study the matter
bispectrum of large scale structure as a probe of these modified gravity
theories, focusing in particular on the effect of the terms that newly appear
in the so-called "beyond Horndeski" theories. We derive the second-order
solution for the matter density perturbations and find that the interactions
beyond Horndeski lead to a new time-dependent coefficient in the second-order
kernel which differs in general from the standard value of general relativity
and the Horndeski theory. This can deform the matter bispectrum at the folded
triangle configurations ($k_1+k_2=k_3$), while it is never possible within the
Horndeski theory.

17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th