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ANTARES Collaboration(Albert, A. et al), Alves, S., Calvo, D., Carretero, V., Gozzini, R., Hernandez-Rey, J. J., et al. (2026). Search for magnetic monopoles with the complete ANTARES dataset. J. High Energy Astrophys., 50, 100500–8pp.
Abstract: This study presents a search for magnetic monopoles using the full ANTARES dataset collected over 14 years (2008-2022). The interaction of monopoles with matter was modeled according to the Kazama, Yang and Goldhaber cross-section, and dedicated reconstruction strategies were applied to probe velocities both above and below the Cherenkov threshold. No signal consistent with monopoles was found. We derive 90% C.L. upper limits on the flux of relativistic monopoles at the level of 10-18 cm-2 s-1 sr-1, improving upon previous ANTARES results and confirming those obtained by IceCube and other neutrino telescopes. These results constitute the final contribution of ANTARES to the search for magnetic monopoles.
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Liu, X. Z., Yang, Y. H., Gessner, M., Smerzi, A., Li, W. D., Yang, X., et al. (2025). Photonic Metrology with Hierarchic Quantum Frequentist Bounds. Adv. Photon. Res., , 7pp.
Abstract: Quantum metrology establishes fundamental precision limits for parameter estimation, yet standard Quantum Cram & eacute;r-Rao Bound (QCRB) becomes insufficient in the finite-data regime. In this article, the QCRB is systematically tighten using a hybrid classical-quantum framework by incorporating generalized unbiasedness constraints through test observables. These frequentist bounds form a hierarchy converging asymptotically to the QCRB as more measurements are performed. These hierarchical frequentist bounds are validated for single-qubit phase estimation on a photonic platform.
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Amerio, A., Hooper, D., & Linden, T. (2025). Millisecond pulsars in globular clusters and implications for the galactic center gamma-ray excess. J. Cosmol. Astropart. Phys., 10(10), 106–34pp.
Abstract: We study the gamma-ray emission from millisecond pulsars within the Milky Way's globular cluster system in order to measure the luminosity function of this source population. We find that these pulsars have a mean luminosity of (L gamma) ti (1-8) x 1033 erg/s (integrated between 0.1 and 100 GeV) and a log-normal width of sigma L ti 1.4-2.8. If the Galactic Center Gamma-Ray Excess were produced by pulsars with similar characteristics, Fermi would have already detected N ti 17-37 of these sources, whereas only three such pulsar candidates have been identified. We conclude that the excess gamma-ray emission can originate from pulsars only if they are significantly less bright, on average, than those observed within globular clusters or in the Galactic Plane. This poses a serious challenge for pulsar interpretations of the Galactic Center Gamma-Ray Excess.
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Navin, A. et al, & Perez-Vidal, R. M. (2025). Level structure of light neutron-rich La isotopes beyond the N=82 shell closure. Phys. Rev. C, 112(4), 044310–16pp.
Abstract: The high spin excited states of Lanthanum isotopes 140-143La, above the N = 82 closed shell, were populated in fission reactions. The prompt gamma-ray transitions were measured using two complementary methods: (a) in coincidence with the isotopically identified fragments produced in the fission of the 238U +9Be system using the Variable Mode Spectrometer (VAMOS++) and the Advanced Gamma Tracking Array (AGATA) spectrometer, and (b) high statistics threefold gamma-gamma-gamma and fourfold gamma-gamma-gamma-gamma coincidence data from the spontaneous fission of 252Cf using the Gammasphere. This work reports the first identification of a pair of parity doublet structures in 143La and the new high spin level structure in 140-142La from prompt gamma-ray spectroscopy. The level structures are interpreted in terms of the systematics of neighboring odd-Z nuclei above the Z = 50 shell closure and large-scale shell model calculations. The present results indicate the presence of stable octupole deformation in 143La. The excitation energy pattern and their comparison with neighboring isotones, moving away from the N = 82 closed shell, point towards a transition from single-particle structures to an alternating parity rotational band structure in the La isotopic chain.
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Adhikari, P. et al, & Noguera, S. (2026). Strongly interacting matter in extreme magnetic fields. Prog. Part. Nucl. Phys., 146, 104199–186pp.
Abstract: Magnetic fields are ubiquitous across different physical systems of current interest; from the early Universe, compact astrophysical objects, and heavy-ion collisions to condensed matter systems. A proper treatment of the effects produced by magnetic fields during the dynamical evolution of these systems can help to understand observables that otherwise show puzzling behavior. Furthermore, when these fields are comparable to or stronger than Lambda QCD, they serve as excellent probes to help elucidate the physics of strongly interacting matter under extreme conditions of temperature and density. This work provides a detailed report that contains indepth analysis and expert insights into the specific topic of the effects of strong magnetic fields on QED and QCD systems. In this sense, the report is intended as a white paper contribution to the field. The subjects developed include the modification of meson static properties such as masses and form factors, the chiral magnetic effect, the description of anomalous transport coefficients, superconductivity in extreme magnetic fields, the properties of neutron stars, the evolution of heavy-ion collisions, as well as effects on the QCD phase diagram. We describe recent theory and phenomenological developments using effective models as well as LQCD methods. The work was motivated by presentations and discussions during the “Workshop on Strongly Interacting Matter in Strong Electromagnetic Fields” that took place in the European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*) in the city of Trento, Italy, September 25-29, 2023.
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