Publications

2026

1. Reanalyzing DESI DR1: 4. Percent-Level Cosmological Constraints from Combined Probes and Robust Evidence for the Normal Neutrino Mass Hierarchy

   Mikhail M. Ivanov, James M. Sullivan, Shi-Fan Chen, and 3 more authors

   Jan 2026

   arXiv
2. Modeling galaxy surveys with hybrid simulation-based inference

   Gemma Zhang, Chirag Modi, and Oliver H. E. Philcox

   Phys. Rev. D, 2026

   DOI arXiv

2025

1. Reanalyzing DESI DR1: 3. Constraints on Inflation from Galaxy Power Spectra & Bispectra

   Anton Chudaykin, Mikhail M. Ivanov, and Oliver H. E. Philcox

   Dec 2025

   arXiv
2. Reanalyzing DESI DR1: 2. Constraints on Dark Energy, Spatial Curvature, and Neutrino Masses

   Anton Chudaykin, Mikhail M. Ivanov, and Oliver H. E. Philcox

   Nov 2025

   arXiv
3. Separating the Inseparable: Constraining Arbitrary Primordial Bispectra with Cosmic Microwave Background Data

   Oliver H. E. Philcox , Kunhao Zhong, and Salvatore Samuele Sirletti

   Nov 2025

   arXiv
4. Constraining Inflationary Particle Production with CMB Polarization

   Luca H. Abu El-Haj, Oliver H. E. Philcox , and J. Colin Hill

   Sep 2025

   arXiv
5. One-Loop Galaxy Bispectrum: Consistent Theory, Efficient Analysis with COBRA, and Implications for Cosmological Parameters

   Thomas Bakx, Mikhail M. Ivanov, Oliver H. E. Philcox , and 1 more author

   Jul 2025

   arXiv
6. Reanalyzing DESI DR1: 1. ΛCDM Constraints from the Power Spectrum and Bispectrum

   Anton Chudaykin, Mikhail M. Ivanov, and Oliver H. E. Philcox

   Jul 2025

   arXiv
7. Quantum stress-energy at timelike boundaries: testing a new beyond-ΛCDM parameter with cosmological data

   Oliver H. E. Philcox , Eva Silverstein, and Gonzalo Torroba

   Jun 2025

   arXiv
8. Wonderings on wiggly bispectra: Nonlinear evolution and reconstruction of oscillations in the squeezed bispectrum

   Samuel Goldstein, Oliver H. E. Philcox , Emanuele Fondi, and 1 more author

   Phys. Rev. D, 2025

   DOI arXiv
9. The Spectroscopic Stage-5 Experiment

   Robert Besuner and others

   Mar 2025

   arXiv
10. Searching for inflationary physics with the CMB trispectrum. III. Constraints from Planck

    Oliver H. E. Philcox

    Phys. Rev. D, 2025

    DOI arXiv
11. Searching for inflationary physics with the CMB trispectrum. II. Code and validation

    Oliver H. E. Philcox

    Phys. Rev. D, 2025

    DOI arXiv
12. Searching for inflationary physics with the CMB trispectrum. I. Primordial theory and optimal estimators

    Oliver H. E. Philcox

    Phys. Rev. D, 2025

    DOI arXiv Bib

    @article{Philcox:2025bvj,
      author = {Philcox, Oliver H. E.},
      title = {{Searching for inflationary physics with the CMB trispectrum. I. Primordial theory and optimal estimators}},
      archiveprefix = {arXiv},
      primaryclass = {astro-ph.CO},
      doi = {10.1103/wkj2-q62t},
      journal = {Phys. Rev. D},
      volume = {111},
      number = {12},
      pages = {123532},
      year = {2025}
    }

13. Non-Gaussianity beyond the scalar sector: A search for tensor and mixed tensor-scalar bispectra with Planck data

    Oliver H. E. Philcox and Maresuke Shiraishi

    Phys. Rev. D, 2025

    DOI arXiv
14. Searching for inflationary particle production in Planck data

    Oliver H. E. Philcox , Soubhik Kumar, and J. Colin Hill

    Phys. Rev. D, 2025

    DOI arXiv
15. A Parameter-Masked Mock Data Challenge for Beyond-Two-Point Galaxy Clustering Statistics

    Elisabeth Krause and others

    Astrophys. J., 2025

    DOI arXiv
16. Suite of optimal and efficient power spectrum and bispectrum estimators for large-scale structure analyses

    Oliver H. E. Philcox and Thomas Flöss

    Phys. Rev. D, 2025

    DOI arXiv
17. BOSS constraints on massive particles during inflation: The cosmological collider in action

    Giovanni Cabass, Oliver H. E. Philcox , Mikhail M. Ivanov, and 4 more authors

    Phys. Rev. D, 2025

    DOI arXiv
18. Integrated Sachs-Wolfe lensing bispectrum and trispectrum

    Oliver H. E. Philcox and J. Colin Hill

    Phys. Rev. D, 2025

    DOI

2024

1. Intermediate mass-range particles from small scales: Nonperturbative techniques for cosmological collider physics from large-scale structure surveys

   Samuel Goldstein, Oliver H. E. Philcox , J. Colin Hill, and 1 more author

   Phys. Rev. D, 2024

   DOI arXiv
2. The Impact of Non-Gaussian Primordial Tails on Cosmological Observables

   William R. Coulton, Oliver H. E. Philcox , and Francisco Villaescusa-Navarro

   Jun 2024

   arXiv
3. Suppression without Thawing: Constraining Structure Formation and Dark Energy with Galaxy Clustering

   Shi-Fan Chen, Mikhail M. Ivanov, Oliver H. E. Philcox , and 1 more author

   Phys. Rev. Lett., 2024

   DOI arXiv
4. The 3D Lyman-\ensuremathα forest power spectrum from eBOSS DR16

   Roger Belsunce, Oliver H. E. Philcox , Vid Irsic, and 3 more authors

   Mon. Not. Roy. Astron. Soc., 2024

   DOI arXiv
5. Could Sample Variance be Responsible for the Parity-Violating Signal Seen in the BOSS Galaxy Survey?

   Oliver H. E. Philcox and Julia Ereza

   Jan 2024

   arXiv
6. Testing graviton parity and Gaussianity with Planck T-, E-, and B-mode bispectra

   Oliver H. E. Philcox and Maresuke Shiraishi

   Phys. Rev. D, 2024

   DOI arXiv
7. Consistently constraining fNL with the squeezed lensing bispectrum using consistency relations

   Samuel Goldstein, Oliver H. E. Philcox , J. Colin Hill, and 2 more authors

   Phys. Rev. D, 2024

   DOI arXiv
8. What can galaxy shapes tell us about physics beyond the standard model?

   Oliver H. E. Philcox , Morgane J. König, Stephon Alexander, and 1 more author

   Phys. Rev. D, 2024

   DOI arXiv
9. Testing parity symmetry with the polarized cosmic microwave background

   Oliver H. E. Philcox and Maresuke Shiraishi

   Phys. Rev. D, 2024

   DOI arXiv
10. Signatures of a parity-violating universe

    William R. Coulton, Oliver H. E. Philcox , and Francisco Villaescusa-Navarro

    Phys. Rev. D, 2024

    DOI arXiv

2023

1. Hybrid SBI or How I Learned to Stop Worrying and Learn the Likelihood

   Chirag Modi and Oliver H. E. Philcox

   Sep 2023

   arXiv
2. Optimal estimation of the binned mask-free power spectrum, bispectrum, and trispectrum on the full sky: Tensor edition

   Oliver H. E. Philcox

   Phys. Rev. D, 2023

   DOI arXiv
3. Measuring H_0 with Spectroscopic Surveys

   Mikhail M. Ivanov and Oliver H. E. Philcox

   May 2023

   arXiv
4. Do the CMB Temperature Fluctuations Conserve Parity?

   Oliver H. E. Philcox

   Phys. Rev. Lett., 2023

   DOI arXiv
5. Optimal estimation of the binned mask-free power spectrum, bispectrum, and trispectrum on the full sky: Scalar edition

   Oliver H. E. Philcox

   Phys. Rev. D, 2023

   DOI arXiv
6. Parity-violating trispectrum from Chern-Simons gravity

   Cyril Creque-Sarbinowski, Stephon Alexander, Marc Kamionkowski, and 1 more author

   JCAP, 2023

   DOI arXiv
7. Accurate estimation of angular power spectra for maps with correlated masks

   Kristen M. Surrao, Oliver H. E. Philcox , and J. Colin Hill

   Phys. Rev. D, 2023

   DOI arXiv
8. Cosmology with the galaxy bispectrum multipoles: Optimal estimation and application to BOSS data

   Mikhail M. Ivanov, Oliver H. E. Philcox , Giovanni Cabass, and 3 more authors

   Phys. Rev. D, 2023

   DOI arXiv
9. Ultra-light axions and the S _8 tension: joint constraints from the cosmic microwave background and galaxy clustering

   Keir K. Rogers, Renée Hložek, Alex Laguë, and 5 more authors

   JCAP, 2023

   DOI arXiv
10. Constraining single-field inflation with MegaMapper

    Giovanni Cabass, Mikhail M. Ivanov, Oliver H. E. Philcox , and 2 more authors

    Phys. Lett. B, 2023

    DOI arXiv
11. Colliders and ghosts: Constraining inflation with the parity-odd galaxy four-point function

    Giovanni Cabass, Mikhail M. Ivanov, and Oliver H. E. Philcox

    Phys. Rev. D, 2023

    DOI arXiv
12. Disordered Heterogeneous Universe: Galaxy Distribution and Clustering across Length Scales

    Oliver H. E. Philcox and Salvatore Torquato

    Phys. Rev. X, 2023

    DOI arXiv
13. The CAMELS Project: Public Data Release

    Francisco Villaescusa-Navarro and others

    Astrophys. J. Suppl., 2023

    DOI arXiv
14. A uniform spherical goat (problem): explicit solution for homologous collapse’s radial evolution in time

    Zachary Slepian and Oliver H. E. Philcox

    Mon. Not. Roy. Astron. Soc., 2023

    DOI arXiv

2022

1. Squeezing fNL out of the matter bispectrum with consistency relations

   Samuel Goldstein, Angelo Esposito, Oliver H. E. Philcox , and 4 more authors

   Phys. Rev. D, 2022

   DOI arXiv
2. Novel cosmological tests from combining galaxy lensing and the polarized Sunyaev-Zel’dovich effect

   Oliver H. E. Philcox and Matthew C. Johnson

   Phys. Rev. D, 2022

   DOI arXiv
3. Probing parity violation with the four-point correlation function of BOSS galaxies

   Oliver H. E. Philcox

   Phys. Rev. D, 2022

   DOI arXiv Bib

   @article{Philcox:2022hkh,
     author = {Philcox, Oliver H. E.},
     title = {{Probing parity violation with the four-point correlation function of BOSS galaxies}},
     archiveprefix = {arXiv},
     primaryclass = {astro-ph.CO},
     doi = {10.1103/PhysRevD.106.063501},
     journal = {Phys. Rev. D},
     volume = {106},
     number = {6},
     pages = {063501},
     year = {2022}
   }

4. Cosmology with the redshift-space galaxy bispectrum monopole at one-loop order

   Oliver H. E. Philcox , Mikhail M. Ivanov, Giovanni Cabass, and 3 more authors

   Phys. Rev. D, 2022

   DOI arXiv
5. Determining the Hubble constant without the sound horizon: A 3.6% constraint on H0 from galaxy surveys, CMB lensing, and supernovae

   Oliver H. E. Philcox , Gerrit S. Farren, Blake D. Sherwin, and 2 more authors

   Phys. Rev. D, 2022

   DOI arXiv Bib

   @article{Philcox:2022sgj,
     author = {Philcox, Oliver H. E. and Farren, Gerrit S. and Sherwin, Blake D. and Baxter, Eric J. and Brout, Dillon J.},
     title = {{Determining the Hubble constant without the sound horizon: A 3.6{\%} constraint on H0 from galaxy surveys, CMB lensing, and supernovae}},
     archiveprefix = {arXiv},
     primaryclass = {astro-ph.CO},
     doi = {10.1103/PhysRevD.106.063530},
     journal = {Phys. Rev. D},
     volume = {106},
     number = {6},
     pages = {063530},
     year = {2022}
   }

6. Constraints on multifield inflation from the BOSS galaxy survey

   Giovanni Cabass, Mikhail M. Ivanov, Oliver H. E. Philcox , and 2 more authors

   Phys. Rev. D, 2022

   DOI arXiv
7. Cosmology intertwined: A review of the particle physics, astrophysics, and cosmology associated with the cosmological tensions and anomalies

   Elcio Abdalla and others

   JHEAp, 2022

   DOI arXiv
8. Constraints on Single-Field Inflation from the BOSS Galaxy Survey

   Giovanni Cabass, Mikhail M. Ivanov, Oliver H. E. Philcox , and 2 more authors

   Phys. Rev. Lett., 2022

   DOI arXiv
9. Determining the Hubble constant without the sound horizon: Perspectives with future galaxy surveys

   Gerrit S. Farren, Oliver H. E. Philcox , and Blake D. Sherwin

   Phys. Rev. D, 2022

   DOI arXiv
10. BOSS DR12 full-shape cosmology: \ensuremathΛCDM constraints from the large-scale galaxy power spectrum and bispectrum monopole

    Oliver H. E. Philcox and Mikhail M. Ivanov

    Phys. Rev. D, 2022

    DOI arXiv Bib

    @article{Philcox:2021kcw,
      author = {Philcox, Oliver H. E. and Ivanov, Mikhail M.},
      title = {{BOSS DR12 full-shape cosmology: {\ensuremath{\Lambda}}CDM constraints from the large-scale galaxy power spectrum and bispectrum monopole}},
      archiveprefix = {arXiv},
      primaryclass = {astro-ph.CO},
      doi = {10.1103/PhysRevD.105.043517},
      journal = {Phys. Rev. D},
      volume = {105},
      number = {4},
      pages = {043517},
      year = {2022}
    }

11. Precision analysis of the redshift-space galaxy bispectrum

    Mikhail M. Ivanov, Oliver H. E. Philcox , Takahiro Nishimichi, and 3 more authors

    Phys. Rev. D, 2022

    DOI arXiv
12. Cosmological constraints without nonlinear redshift-space distortions

    Mikhail M. Ivanov, Oliver H. E. Philcox , Marko Simonović, and 3 more authors

    Phys. Rev. D, 2022

    DOI arXiv
13. Analytic Gaussian covariance matrices for galaxy N-point correlation functions

    Jiamin Hou, Robert N. Cahn, Oliver H. E. Philcox , and 1 more author

    Phys. Rev. D, 2022

    DOI arXiv
14. Efficient computation of N-point correlation functions in D dimensions

    Oliver H. E. Philcox and Zachary Slepian

    Proc. Nat. Acad. Sci., 2022

    DOI arXiv

2021

1. A First Detection of the Connected 4-Point Correlation Function of Galaxies Using the BOSS CMASS Sample

   Oliver H. E. Philcox , Jiamin Hou, and Zachary Slepian

   Aug 2021

   arXiv
2. Cosmology without window functions. II. Cubic estimators for the galaxy bispectrum

   Oliver H. E. Philcox

   Phys. Rev. D, 2021

   DOI arXiv
3. encore: an O (Ng2) estimator for galaxy N-point correlation functions

   Oliver H. E. Philcox , Zachary Slepian, Jiamin Hou, and 3 more authors

   Mon. Not. Roy. Astron. Soc., 2021

   DOI arXiv Bib

   @article{Philcox:2021bwo,
     author = {Philcox, Oliver H. E. and Slepian, Zachary and Hou, Jiamin and Warner, Craig and Cahn, Robert N. and Eisenstein, Daniel J.},
     title = {{encore: an O (Ng2) estimator for galaxy N-point correlation functions}},
     archiveprefix = {arXiv},
     primaryclass = {astro-ph.IM},
     doi = {10.1093/mnras/stab3025},
     journal = {Mon. Not. Roy. Astron. Soc.},
     volume = {509},
     number = {2},
     pages = {2457--2481},
     year = {2021}
   }

4. An exact integral-to-sum relation for products of Bessel functions

   Oliver H. E. Philcox and Zachary Slepian

   Proc. Roy. Soc. Lond. A, 2021

   DOI arXiv
5. Beyond the Yamamoto approximation: Anisotropic power spectra and correlation functions with pairwise lines of sight

   Oliver H. E. Philcox and Zachary Slepian

   Phys. Rev. D, 2021

   DOI arXiv
6. Cosmology without window functions: Quadratic estimators for the galaxy power spectrum

   Oliver H. E. Philcox

   Phys. Rev. D, 2021

   DOI arXiv
7. Modeling Galaxies in Redshift Space at the Field Level

   Marcel Schmittfull, Marko Simonović, Mikhail M. Ivanov, and 2 more authors

   JCAP, 2021

   DOI arXiv
8. Modeling the Marked Spectrum of Matter and Biased Tracers in Real- and Redshift-Space

   Oliver H. E. Philcox , Alejandro Aviles, and Elena Massara

   JCAP, 2021

   DOI arXiv
9. The CAMELS project: Cosmology and Astrophysics with MachinE Learning Simulations

   Francisco Villaescusa-Navarro and others

   Astrophys. J., 2021

   DOI arXiv
10. Fewer Mocks and Less Noise: Reducing the Dimensionality of Cosmological Observables with Subspace Projections

    Oliver H. E. Philcox , Mikhail M. Ivanov, Matias Zaldarriaga, and 2 more authors

    Phys. Rev. D, 2021

    DOI arXiv
11. Determining the Hubble Constant without the Sound Horizon: Measurements from Galaxy Surveys

    Oliver H. E. Philcox , Blake D. Sherwin, Gerrit S. Farren, and 1 more author

    Phys. Rev. D, 2021

    DOI arXiv
12. A faster Fourier transform? Computing small-scale power spectra and bispectra for cosmological simulations in \mathcalO(N^2) time

    Oliver H. E. Philcox

    Mon. Not. Roy. Astron. Soc., 2021

    DOI arXiv

2020

1. The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR16 luminous red galaxy and emission line galaxy samples: cosmic distance and structure growth measurements using multiple tracers in configuration space

   Yuting Wang and others

   Mon. Not. Roy. Astron. Soc., 2020

   DOI arXiv
2. What does the marked power spectrum measure? Insights from perturbation theory

   Oliver H. E. Philcox , Elena Massara, and David N. Spergel

   Phys. Rev. D, 2020

   DOI arXiv
3. Nonlinear perturbation theory extension of the Boltzmann code CLASS

   Anton Chudaykin, Mikhail M. Ivanov, Oliver H. E. Philcox , and 1 more author

   Phys. Rev. D, 2020

   DOI arXiv
4. Effective halo model: Creating a physical and accurate model of the matter power spectrum and cluster counts

   Oliver H. E. Philcox , David N. Spergel, and Francisco Villaescusa-Navarro

   Phys. Rev. D, 2020

   DOI arXiv
5. Combining Full-Shape and BAO Analyses of Galaxy Power Spectra: A 1.6}% CMB-independent constraint on H_0

   Oliver H. E. Philcox , Mikhail M. Ivanov, Marko Simonović, and 1 more author

   JCAP, 2020

   DOI arXiv
6. Computing the Small-Scale Galaxy Power Spectrum and Bispectrum in Configuration-Space

   Oliver H. E. Philcox and Daniel J. Eisenstein

   Mon. Not. Roy. Astron. Soc., 2020

   DOI arXiv
7. rascalc: a jackknife approach to estimating single- and multitracer galaxy covariance matrices

   Oliver H. E. Philcox , Daniel J. Eisenstein, Ross O’Connell, and 1 more author

   Mon. Not. Roy. Astron. Soc., 2020

   DOI arXiv

2019

1. Estimating Covariance Matrices for Two- and Three-Point Correlation Function Moments in Arbitrary Survey Geometries

   Oliver H. E. Philcox and Daniel J. Eisenstein

   Mon. Not. Roy. Astron. Soc., 2019

   DOI arXiv
2. Inferring Galactic Parameters from Chemical Abundances: A Multi-Star Approach

   Oliver Henry Edward Philcox and Jan Rybizki

   Sep 2019

   DOI arXiv

2018

1. Detection and Removal of B-mode Dust Foregrounds with Signatures of Statistical Anisotropy

   Oliver H. E. Philcox , Blake D. Sherwin, and Alexander Engelen

   Mon. Not. Roy. Astron. Soc., 2018

   DOI arXiv