X-ray–regenerative–amplifier free-electron-laser scheme with electron-beam-based Q switching.

It is our pleasure to introduce the first published articles from PRX Life, the American Physical Society’s new interdisciplinary, open-access journal exclusively for quantitative biological research.

Improved calculations of a quantum phenomenon called Delbrück scattering resolve a long-standing discrepancy between theory and experiment.

Synopsis on:
J. Sommerfeldt, V. A. Yerokhin, Th. Stöhlker, and A. Surzhykov
Phys. Rev. Lett. 131, 061601 (2023)

A novel acoustic Su-Schrieffer-Heeger chain with non-Hermitian components displays a non-Hermitian phase transition and reveals new acoustic topological interface states with tunable robust confinement.

Decays of $Z$ bosons to charm quark-antiquark pairs have been observed for the first time at a hadron collider, as part of a search for decays of Higgs bosons to charm quark-antiquark pairs, which are bounded at 14 times the standard model value.

Calculations of the minimum energy a cell requires to transmit a signal between two internal components could help scientists understand how energy and information combine to produce living systems.

Viewpoint on:
Samuel J. Bryant and Benjamin B. Machta
Phys. Rev. Lett. 131, 068401 (2023)

The proposed bichromatic imaging scheme could lead to high-fidelity detection of single CaF molecules trapped in an optical tweezer array.

Simulations show that the topology of biopolymer “tangles” controls how biological cells resist deformation.

Synopsis on:
Marco Pensalfini, Tom Golde, Xavier Trepat, and Marino Arroyo
Phys. Rev. Lett. 131, 058101 (2023)

Measurements of the highest-energy radiation from the Sun ever seen highlight the need for better solar models.

Synopsis on:
A. Albert et al. (HAWC Collaboration)
Phys. Rev. Lett. 131, 051201 (2023)

A new form of demixing instability may explain the strong dependence of phase separation in biological mixtures on their composition.

A low-frequency radar method with improved resolution could aid in the detection of landmines and archeological objects.

Focus story on:
John C. Howell, Andrew N. Jordan, Barbara Šoda, and Achim Kempf
Phys. Rev. Lett. 131, 053803 (2023)

New data from observations of B-meson decay again vindicate the standard model of particle physics.

Synopsis on:
L. Aggarwal et al. (Belle II Collaboration)
Phys. Rev. Lett. 131, 051804 (2023)

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. Lett. 131, 051803 (2023)

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. D 108, 032002

In a new forward-looking Essay, Ambrogio Fasoli outlines the challenges and opportunities of realizing sustainable magnetic fusion.

Editors from Physical Review Letters, Physical Review Applied, and Physical Review Materials have gathered several recently published papers in soft matter and polymer research in an effort to illustrate the kind of papers these journals are looking for in this topic.