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- W3100609576 abstract "We develop an analytic method for implementing the IR-resummation of [1], which allows one to correctly and consistently describe the imprint of baryon acoustic oscillations (BAO) on statistical observables in large-scale structure. We show that the final IR-resummed correlation function can be computed analytically without relying on numerical integration, thus allowing for an efficient and accurate use of these predictions on real data in cosmological parameter fitting. In this work we focus on the one-loop correlation function and the BAO peak. We show that, compared with the standard numerical integration method of IR-resummation, the new method is accurate to better than 0.2%, and is quite easily improvable. We also give an approximate resummation scheme which is based on using the linear displacements of a fixed fiducial cosmology, which when combined with the method described above, is about six times faster than the standard numerical integration. Finally, we show that this analytic method is generalizable to higher loop computations." @default.
- W3100609576 created "2020-11-23" @default.
- W3100609576 creator A5019274923 @default.
- W3100609576 creator A5019308171 @default.
- W3100609576 date "2020-03-06" @default.
- W3100609576 modified "2023-09-24" @default.
- W3100609576 title "An analytic implementation of the IR-resummation for the BAO peak" @default.
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- W3100609576 doi "https://doi.org/10.1088/1475-7516/2020/03/018" @default.
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