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Author(s): Felix M. Heinze, Gerhard Schäfer, and Bernd Brügmann Although even the 2-body problem in general relativity (GR) has not been solved exactly, the so-called post-Newtonian (PN) expansion provides a valuable approximation scheme adequate for many physical situations. In the present paper, the N-body Hamiltonian is analytically evaluated (up to a single integral) at 2PN precision. This level of precision had previously been achieved only...

Author(s): Caio V. P. de Brito, David Wagner, Gabriel S. Denicol, and Dirk H. Rischke A standard lore in relativistic fluid dynamics is that the widely-used moment expansion for the single particle distribution function converges. The authors challenge this assumption, demonstrating in a simple example that the moment expansion does not produce decreasing multipole coefficients of a series of orthogonal polynomials. This divergence can nevertheless...

Author(s): J. McCullough et al. (DES Collaboration) The authors use the Dark Energy Survey Year 3 galaxy-shear catalog to demonstrate that the challenge of intrinsic alignment (IA) modeling can be effectively circumvented when using a subsample of blue, star-forming galaxies, which are virtually devoid of IA effects. In particular, goodness of fit and agreement with Planck results improve both for Ωₘ and 𝑆₈ . [Phys. Rev. D 113, 103509] Published...

Author(s): Anthony Francis, Patrick Fritzsch, Rohith Karur, Jangho Kim, Giovanni Pederiva, Dimitra A. Pefkou, Antonio Rago, Andrea Shindler, André Walker-Loud, and Savvas Zafeiropoulos A gradient-flow-based lattice QCD method overcomes the long standing hinderance in computing higher Mellin moments of parton distribution functions due to power-divergent operator mixings. [Phys. Rev. D 113, 074520] Published Wed Apr 29, 2026

Author(s): Alan Price and Frank Krauss Especially at proposed future lepton colliders, the description of electroweak radiation at high perturbative accuracy will be critical to achieve the high precision goals for sensitivity to rare Standard Model processes or new physics. The authors present an algorithm based on the Yennie-Frautschi-Suura theorem and demonstrate the first process-independent inclusion of electroweak corrections at next-to...

Author(s): M. Gatti et al. The authors present the largest (270 million galaxies) galaxy weak-lensing mass map to date from combined analysis of Dark Energy Camera All Data Everywhere (DECADE) and Dark Energy Survey Year-3 data. They further showcase its potential for cosmological applications by detecting cosmic filaments directly from the mass map. [Phys. Rev. D 113, L081303] Published Thu Apr 23, 2026

Author(s): Oliver Just, Zewei Xiong, and Gabriel Martínez-Pinedo Nuclear reactions of any sort are computationally difficult to include in any sort of astrophysical simulation. The combination of a large number of species to keep track of and stiff differential equations will bog down these computations. Thus, there is a strong impetus to developed simplified models or approximate methods to allow for nuclear reactions to be included. In this...