| Volume 109, Issues 1 - 2 January 2024 | | Advertisement | Early bird registration is officially open for April Meeting 2024! Discover groundbreaking research from Quarks to Cosmos, connect with new collaborators and longtime colleagues, and prepare for career success at April Meeting 2024. Register today. | | | | |
| Not an APS member? Join today to start connecting with a community of more than 50,000 physicists. | | | | Editors' Suggestion Yuki Fujimoto and Sanjay Reddy Phys. Rev. D 109, 014020 (2024) – Published 19 January 2024  | The equation of state for nuclear matter is essential to understanding neutron stars. Using strict QCD inequalities and input from numerical simulations on the lattice, the authors derive useful bounds on the baryon and energy densities, which are relevant to isospin symmetric matter at densities probed by heavy ion collisions. | | | | | | Editors' Suggestion Marco Cè, Tim Harris, Ardit Krasniqi, Harvey B. Meyer, and Csaba Török Phys. Rev. D 109, 014507 (2024) – Published 18 January 2024  | One of the most important applications of lattice gauge theory is the computation of transport coefficients at nonzero temperature. The authors compute moments of the photon emissivity with respect to the imaginary frequency, and find promising results. | | | | | | Editors' Suggestion John Bulava, Bárbara Cid-Mora, Andrew D. Hanlon, Ben Hörz, Daniel Mohler, Colin Morningstar, Joseph Moscoso, Amy Nicholson, Fernando Romero-López, Sarah Skinner, and André Walker-Loud (Baryon Scattering (BaSc) Collaboration) Phys. Rev. D 109, 014511 (2024) – Published 30 January 2024  | The first lattice QCD computation of πΣ-K̅ N scattering amplitudes supports the two-pole nature of the puzzling Λ(1405) resonance. | | | | | | Editors' Suggestion John Collins and Ted C. Rogers Phys. Rev. D 109, 016006 (2024) – Published 5 January 2024  | The authors discuss how in QCD, processes which describe how final state hadrons arise from a parton in hard scattering are sensitive to the Wilson line necessary for gauge invariance. This affects some sum rules, notably that for charge conservation. | | | | | | Editors' Suggestion R. Abbott et al. (The LIGO Scientific Collaboration and the Virgo Collaboration) Phys. Rev. D 109, 022001 (2024) – Published 5 January 2024  | GWTC-2.1 is a catalog of gravitational wave events from compact binary coalescences from the first half of the third observing run of Advanced LIGO and Advanced Virgo. It improves on GWTC-2, which covered the same period but with less refined analysis methods. GWTC-2.1 identifies 8 new events, all identified as sourced by binary black holes with one exception identified as a neutron star-black hole coalescence. These events expand significantly on the parameters characterizing the sources of observed gravitational-wave transients. | | | | | | Editors' Suggestion Yuta Michimura, Haoyu Wang, Francisco Salces-Carcoba, Christopher Wipf, Aidan Brooks, Koji Arai, and Rana X. Adhikari Phys. Rev. D 109, 022009 (2024) – Published 29 January 2024  | Crystalline materials in gravitational wave detectors as substrates and mirror coatings could provide many advantages. The authors carry out a theoretical study to quantify how birefringence and its fluctuations can limit the sensitivity of GW detectors and show ways to mitigate these effects through the orientation of the beam polarization and the crystalline material. | | | | | | Editors' Suggestion Damiano F. G. Fiorillo, Georg G. Raffelt, and Edoardo Vitagliano Phys. Rev. D 109, 023017 (2024) – Published 11 January 2024  | The paper examines theoretically the possibility that neutrinos in supernova cores act as a self-coupled fluid. It follows systematically from first principles the fluid's diffusive transport through the core to the surface, and its expansion into space. | | | | | | Editors' Suggestion Sho Fujibayashi, Alan Tsz-Lok Lam, Masaru Shibata, and Yuichiro Sekiguchi Phys. Rev. D 109, 023031 (2024) – Published 31 January 2024  | Black-hole forming collapse of massive stars are studied using general relativistic viscous radiation hydrodynamics with axial symmetry. The authors uncover a rich set of phenomena: a supernova-like explosion mechanism driven by viscous and shock heating resulting in the expulsion of a significant fraction of the energy, rapidly spinning black hole formation, and the generation of highly energetic jets and associated gamma-ray bursts. | | | | | | Editors' Suggestion Alexander C. Jenkins, Jonathan Braden, Hiranya V. Peiris, Andrew Pontzen, Matthew C. Johnson, and Silke Weinfurtner Phys. Rev. D 109, 023506 (2024) – Published 4 January 2024  | The authors study how phase transitions in ultracold atomic gases mimic relativistic vacuum decay, improving on previous analyses by incorporating the effects of quantum fluctuations over and above the classical equations of motion. This is designed to test early Universe physics via tabletop experiments. | | | | | | Editors' Suggestion Andrei O. Barvinsky and Nikita Kolganov Phys. Rev. D 109, 025004 (2024) – Published 5 January 2024  | Motivated by cosmological Hartle-Hawking and microcanonical density matrix prescriptions for the quantum state of the Universe, the authors develop a Schwinger-Keldysh in-in formalism for generic non-equilibrium systems with an initial density matrix. For generic density matrices of the Gaussian type, they develop the generating functionals of the in-in Green's functions and discuss how "particle interpretation" relates to the density matrix parameters. | | | | | | | |
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