Four-point correlation modular bootstrap for OPE densities
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep10(2021)194
Abstract: Abstract In this work we apply the lightcone bootstrap to a four-point function of scalars in two-dimensional conformal field theory. We include the entire Virasoro symmetry and consider non-rational theories with a gap in the… read more here.
Keywords: bootstrap; point correlation; correlation modular; modular bootstrap ... See more keywords
A model for the redshift-space galaxy 4-point correlation function
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2025/01/090
Abstract: The field of cosmology is entering an epoch of unparalleled wealth of observational data thanks to galaxy surveys such as DESI, Euclid, and Roman. Therefore, it is essential to have a firm theoretical basis that… read more here.
Keywords: space; redshift space; point correlation; cosmology ... See more keywords
Semi-analytical covariance matrices for two-point correlation function for DESI 2024 data
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2025/01/145
Abstract: We present an optimized way of producing the fast semi-analytical covariance matrices for the Legendre moments of the two-point correlation function, taking into account survey geometry and mimicking the non-Gaussian effects. We validate the approach… read more here.
Keywords: analytical covariance; two point; covariance; point correlation ... See more keywords
Model-agnostic basis functions for the 2-point correlation function of dark matter in linear theory
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2025/06/009
Abstract: We consider approximating the linearly evolved 2-point correlation function (2pcf) of dark matter ξ lin(r;θ) in a cosmological model with parameters θ as the linear combination ξ lin(r;θ)≈∑ i bi (r) wi (θ), where the… read more here.
Keywords: dark matter; model agnostic; basis; point correlation ... See more keywords
Constraining primordial non-Gaussianity from the large scale structure two-point and three-point correlation functions
Sign Up to like & getrecommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staf1411
Abstract: Surveys of cosmological large-scale structure (LSS) are sensitive to the presence of local primordial non-Gaussianity (PNG), and may be used to constrain models of inflation. Local PNG, characterized by fNL, the amplitude of the quadratic… read more here.
Keywords: three point; point; two point; point correlation ... See more keywords
Third-Order Effective Properties for Random-Packing Systems Using Statistical Micromechanics Based on a GPU Parallel Algorithm in Fast Computing n-Point Correlation Functions
Sign Up to like & getrecommendations! Published in 2022 at "Materials"
DOI: 10.3390/ma15165799
Abstract: Estimating the effective properties of a particulate system is the most direct way to understand its macroscopic performance. In this work, we accurately evaluate the third-order approximations involving the three-point microstructural parameter ζ, which can… read more here.
Keywords: correlation functions; point correlation; third order; point ... See more keywords
Bandwidth selection for estimating the two-point correlation function of a spatial point pattern using AMSE
Sign Up to like & getrecommendations! Published in 2018 at "Statistica Sinica"
DOI: 10.5705/ss.202015.0426
Abstract: The two-point correlation function (2PCF) is a measure of the secondorder properties of a spatial point pattern and is commonly used in astronomy. We introduce an asymptotic mean squared error (AMSE) approach to obtain closedform… read more here.
Keywords: point pattern; point; two point; spatial point ... See more keywords