Modelling the matter bispectrum at small scales in modified gravity

Understand

Future large-scale structure surveys will measure three-point statistics with high statistical significance.

• This will offer significant improvements on our understanding of gravity, provided we can model these statistics accurately.
• We assess the performance of several schemes for theoretical modelling of the matter bispectrum, including halo-model based approaches and fitting formulae.
• We compare the model predictions against N-body simulations, considering scales up to $k_{\rm max} = 4 h/{\rm Mpc}$, well into non-linear regime of structure formation.