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n_TOF Collaboration(Mucciola, R. et al), Babiano-Suarez, V., Balibrea-Correa, J., Domingo-Pardo, C., Ladarescu, I., & Lerendegui-Marco, J. (2026). Improved 94Mo neutron resonance parameters from neutron capture and transmission measurements at n_TOF and GELINA. Phys. Rev. C, 114(3), 034623–16pp.
Abstract: We report high-resolution measurements of the 94Mo(n, gamma) 95Mo cross section in the neutron energy range from a few eV up to about 250 keV, performed at the n_TOF facility (CERN), and of the 94Mo(n, tot) cross section up to 32 keV, measured at GELINA (JRC Geel). A combined R-matrix analysis of capture and transmission data yields significantly improved neutron-resonance parameters for 94Mo. A total of 186 resonances were observed in this analysis, of which 127 were not present in latest evaluations. The resulting Maxwellian-averaged cross section at stellar temperatures relevant to the slow neutron-capture process (s-process) is approximately 25% lower than previous evaluations and literature values. To assess the astrophysical impact of the revised cross section, we performed s-process nucleosynthesis calculations for low-mass asymptotic giant branch stars. Despite the substantial reduction in the 94Mo(n, gamma) 95Mo rate, the final yields vary by only 3%-4%. This demonstrates that the isotopic budget of 94Mo in asymptotic giant branch stars is primarily governed by the branching flow at 94Nb rather than by the neutron-capture destruction on 94Mo itself. The new cross section thus helps disentangle nuclear cross-section uncertainties from branching-flow effects in the s-process production of 94Mo.
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Sonneveld, J., Bergauer, T., Casanova, R., Handerkas, H., Irmler, C., Jimenez-Sanchez, J., et al. (2027). The RD50-MPW4: A radiation hard HV CMOS sensor for future colliders. Nucl. Instrum. Methods Phys. Res. A, 1093, 172091–5pp.
Abstract: The former CERN RD50 collaboration develops monolithic active pixel high voltage (HV) CMOS sensors for future colliders with the aim of high radiation tolerance, good time resolution, and high granularity pixel detectors. The most recent prototype, the RD50-MPW4, was produced by LFoundry in December 2023 using a 150 nm CMOS process. It features a matrix of 64x64 pixels with a 62 μm pitch and employs a column-drain readout architecture. Compared to its predecessor, it now has separate analog and digital power domains and a new biasing scheme with a guard ring structure that supports bias voltages over 600 V. This contribution will discuss the design and latest results of the MPW4, where tests with unirradiated samples showed more than 99.9% efficiency, 16 μm spatial resolution and 10 ns timing resolution. Efficiencies of over 99% were achieved for samples irradiated to fluences of 1 & times;1015 1 MeV neq/cm2. A 3D map of the charge collection efficiency from a measurement with two-photon absorption laser is presented that nicely outlines the depletion depth of this radiation hard, high granularity monolithic active pixel sensor.
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Arguelles, C. A., Bertolez-Martinez, T., Burgos-Mondejar, A., Burns, A. K., Lopez-Pavon, J., & Salvado, J. (2026). Seafloor topography enhances KM3NeT sensitivity to ANITA-like events. J. High Energy Phys., 09(9), 229–31pp.
Abstract: In this article, we introduce the concept of topographic enhancement in the context of ultra-high-energy neutrino detection by underwater neutrino telescopes. We demonstrate that the local topography around KM3NeT/ARCA can increase the detection efficiency in scenarios involving long-lived particles by up to a factor of similar to 3 due to the presence of an underwater mountain range in the direction of Malta. We consider a simplified model-independent approach that parametrizes the new physics able to generate both track-like and cascade-like signals in neutrino telescopes. When explaining the KM3-230213A event with a diffuse dark flux hypothesis, including its azimuthal direction – in addition to the zenith angle – provides additional constraints on the parameter space. In this effective model, the observations by KM3NeT and ANITA-IV can be simultaneously explained, but a global tension with the lack of a corresponding detection in IceCube remains at 2.7 sigma. This work underscores the importance of incorporating topographic effects in the design and optimization of next-generation neutrino telescopes, as is done in the context of mountain-based detectors such as TAMBO. We present which can be used to easily extend this topographical analysis to other experiments.
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ATLAS Collaboration(Aad, G. et al), Ahuja, S., Aikot, A., Cabrera Urban, S., Cantero, J., Carrion Martinez, C., et al. (2026). Calibration of the jet energy scale and resolution of small-radius jets using semileptonic t(t)over-bar events with the ATLAS detector. Eur. Phys. J. C, 86(8), 943–36pp.
Abstract: A measurement of correction factors for the hadronic jet energy scale and resolution in the ATLAS detector is presented. These correction factors account for differences between simulated and observed data. They are obtained by analysing a selection of top quark events collected in proton-proton collisions by ATLAS between the years 2015 and 2018 at a centre-of-mass energy root s = 13 TeV as well as in 2022 and 2023 at root s = 13.6 TeV. The impact of different jet energy scale or resolution corrections on the reconstructed mass of the hadronically decaying W boson from top-quark decays in simulation is quantified. The correction factors are extracted from a fit to the parameterised reconstructedW-boson mass distribution to data. The energy scale and resolution corrections are measured as a function of the jet transverse momentum between 20 and 200 GeV and absolute pseudorapidity less than 0.8. The uncertainties in the energy scale range from about 0.93% to about 1.7% for jets between 35 and 200 GeV, while for the energy resolution the uncertainties range from about 14 to 28%. The method presented will be used in conjunction with other techniques to further improve ATLAS jet energy scale and resolution precision.
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Cheng, H. Y., Guo, Z. H., He, X. G., Hou, Y. R., Kang, X. W., Kupsc, A., et al. (2027). CP violation studies at Super Tau-Charm Facility. Phys. Rep., 1210, 1–60.
Abstract: Charge-parity (CP) violation in the tau-charm energy region is a promising area for sensitive tests of Standard Model (SM) predictions and searches for new, beyond the SM physics. A future Tau-Charm Facility that operates at center-of-mass energies between 2.0 and 7.0 GeV, with a peak luminosity of 0.5 & times; 1035 cm-2 s-1, would provide huge numbers of hadrons and tau (tau) leptons that are produced in low-background environments and with well understood kinematic properties. In this report, prospects for unique studies of CP violation in the decay of charmed hadrons, and in the production and decay of hyperons and tau leptons at a next-generation tau-charm facility are discussed. In addition, opportunities for improved tests of CPT invariance test in K0-K & strns;0 mixing are presented. (c) 2026 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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