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- W2779061497 abstract "We present direct measurements of cubic bias parameters of dark matter halos from the halo-matter-matter-matter trispectrum. We measure this statistic efficiently by cross-correlating the halo field measured in N-body simulations with specific third-order nonlocal transformations of the initial density field in the same simulation. Together with the recent Abidi & Baldauf (2018), these are the first measurements of halo bias using the four-point function that have been reported to date. We also obtain constraints on the quadratic bias parameters. For all individual cubic parameters involving the tidal field $mathcal{K}_{ij}$, we find broad consistency with the prediction of the Lagrangian local-in-matter-density ansatz, with some indications of a positive Lagrangian coefficient $b_{rm td}^L$ multiplying the time derivative of $mathcal{K}_{ij}$. For the quadratic tidal bias ($b_{K^2}$), we obtain a significant detection of a negative Lagrangian tidal bias." @default.
- W2779061497 created "2018-01-05" @default.
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- W2779061497 date "2018-09-07" @default.
- W2779061497 modified "2023-10-02" @default.
- W2779061497 title "Beyond LIMD bias: a measurement of the complete set of third-order halo bias parameters" @default.
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- W2779061497 doi "https://doi.org/10.1088/1475-7516/2018/09/008" @default.
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