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Bombacigno, F., Moretti, F., & Olmo, G. J. (2025). Gravitational waves in Palatini gravity for a non-minimal geometry-matter coupling. J. Cosmol. Astropart. Phys., 12(12), 030–33pp.
Abstract: We discuss the propagation of gravitational waves over a non-Riemannian spacetime, when a non-minimal coupling between the geometry and matter is considered in the form of contractions of the energy momentum tensor with the Ricci and co-Ricci curvature tensors. We focus our analysis on perturbations on a Minkowski background, elucidating how derivatives of the energy momentum tensor can sustain non-trivial torsion and non-metricity excitations, eventually resulting in additional source terms for the metric field. These can be reorganized in the form of d'Alembert operator acting on the energy momentum tensor and the equivalence principle can be reinforced at the linear level by a suitable choice of the parameters of the model. We show how tensor polarizations can exhibit a subluminal phase velocity in matter, evading the constraints found in General Relativity, and how this allows for the kinematic damping in specific configurations of the medium and of the geometry-matter coupling. These in turn define regions in the wavenumber space where propagation is forbidden, leading to the appearance of typical cut-off scale in the frequency spectrum.
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Mijatovic, T., Szilner, S., Corradi, L., Galtarossa, F., Pollarolo, G., Colucci, G., et al. (2026). Revealing nucleon-nucleon correlation effects through sub-Coulomb transfer reactions in 92Mo+54Fe. Phys. Lett. B, 872, 140085–7pp.
Abstract: Cross sections for neutron and proton transfer channels were measured in the proton-rich system 92Mo+54Fe using the PRISMA magnetic spectrometer. The energy dependence of the absolute transfer cross sections was investigated over a beam energy range spanning from slightly above to below the Coulomb barrier. A significant enhancement was observed in the 2p and 2p + 2n pickup and stripping channels compared to expectations based on independent single-nucleon transfer, suggesting strong correlations in the multinucleon transfer mechanism.
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ATLAS Collaboration(Aad, G. et al), Aikot, A., Amos, K. R., Bouchhar, N., Cabrera Urban, S., Cantero, J., et al. (2025). Software and computing for Run 3 of the ATLAS experiment at the LHC. Eur. Phys. J. C, 85(3), 234–117pp.
Abstract: The ATLAS experiment has developed extensive software and distributed computing systems for Run 3 of the LHC. These systems are described in detail, including software infrastructure and workflows, distributed data and workload management, database infrastructure, and validation. The use of these systems to prepare the data for physics analysis and assess its quality are described, along with the software tools used for data analysis itself. An outlook for the development of these projects towards Run 4 is also provided.
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Zeng, Q. B. et al, & Morales, A. I. (2025). β-Decay Half-Lives of Neutron-Rich Sulfur to Potassium: Evolution of the N=32 and 34 Subshell Closures below Calcium. Phys. Rev. Lett., 135(23), 232501–7pp.
Abstract: The half-lives of 24 isotopes ranging from sulfur to potassium were measured using the ZeroDegree Advanced Decay Station at the Radioactive Isotope Beam Factory, including six of the most neutron-rich -47S, 48;49Cl, 51;52Ar, 55K-for the first time, while the precision for 48Ar and 53;54K was significantly improved. Two prominent features are found: First, a half-life drop at 54K35 relative to 52;53K, supporting the persistence of the N = 34 subshell closure in potassium with Z = 19. Second, a high /3-decay rate for 48Cl31 compared to 47Cl and 49Cl, which can be explained by the critical role of the nu 1p1=2 orbital in shell-model calculations. The present calculations indicate that the N = 32 subshell gap in chlorine with Z = 17 is slightly smaller than that in calcium (Z = 20), and the significant excitation across the N = 32 subshell in 48Cl31 is mainly due to strong configuration mixing.
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Eberhart, A., Fedele, M., Kahlhoefer, F., Ravensburg, E., & Ziegler, R. (2025). Leptophilic ALPs in laboratory experiments. J. High Energy Phys., 12(12), 055–46pp.
Abstract: We study the collider phenomenology of leptophilic axion-like particles (ALPs), i.e. pseudoscalar particles that couple only to charged leptons. Loops of charged leptons induce effective interactions of the ALPs with photons, which depend on the momenta of the interacting particles and differ between pseudoscalar and derivative lepton couplings. We systematically discuss the form of the interaction with photons for general external momenta and identify the regimes when it can be safely approximated by an effective coupling constant. We use these results to derive novel constraints from LEP and calculate state-of-the-art limits from E137 and NA64 for four different scenarios, in which the ALPs couple either to a single lepton generation or universally to all, for both pseudoscalar and derivative lepton couplings. We collect complementary bounds from astrophysics, flavour, and other laboratory experiments to chart the allowed parameter space of leptophilic ALPs in the MeV-GeV mass range.
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