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Liu, S. W., Lyu, W. T., & Xie, J. J. (2026). Probing the hadronic molecular nature of the Ω(2012), Ω(2380), and Ωc(3120) via femtoscopy correlation functions. Phys. Lett. B, 882, 140979–9pp.
Abstract: We investigate the femtoscopic correlation functions of systems associated with the Omega(2012), Omega(2380), and Omega(c)(3120) resonances, with the aim of elucidating their internal structures. By employing effective potential models that incorporate both s-wave and d-wave interactions, we calculate the correlation functions for the relevant coupled channels. Our numerical results reveal pronounced enhancement structures in the Xi(0) K- and Xi(+)(c) K- correlation functions, which provide direct evidences for the dynamically generated Omega(2012) and Omega(c)(3120) states. Furthermore, significant low-momentum enhancements are observed in the Xi*0K(-) and Xi*K-0*(-) channel, which are attributed to the Omega(2012) and Omega(2380) resonances. These theoretical calculations provide crucial insights for future high-precision measurements at the LHC and RHIC, offering a novel and independent approach to determine the dynamically generated hadronic molecular nature of these Omega excited states.
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KM3NeT, F. - L. A. T. and S. V. O. M. C.(A., O. et al), Alves Garre, S., Bariego-Quintana, A., Calvo, D., Cecchini, V., Garcia Soto, A., et al. (2026). Characterizing Candidate Blazar Counterparts of the Ultra-high-energy Event KM3-230213A. Astron. J., 172(3), 139–34pp.
Abstract: High-energy astrophysical neutrinos serve as crucial messengers for understanding hadronic acceleration processes and identifying the origins of cosmic rays, with blazars among the most promising neutrino sources. The KM3NeT experiment reported the detection of an ultrahigh-energy neutrino with an energy estimate of similar to 220 PeV, the most energetic yet observed. The neutrino arrival direction has a 99% confidence region of 3 degrees radius centered at R.A. 94.degrees 3, decl. -7.degrees 8 (J2000). In this work, 17 candidate blazars located within this region are identified. Comprehensive new observations and archival data analysis for these sources are presented. The study provides a complete multiwavelength coverage across radio, optical, X-ray, and gamma-ray bands, including proprietary data and dedicated follow-up observations. This study highlights flaring behavior in several candidate counterparts. One object exhibits a radio flare coinciding with the neutrino arrival time, with a pre-trial chance probability of 0.26%. Only for this object, the chance probability could be quantified in a robust way. Another candidate displays a rising trend in X-ray flux in a 1 yr window around the neutrino arrival time, while a third undergoes a gamma-ray flare during the same period. Based on the observational findings presented here, while none of these candidates can conclusively be linked to the neutrino, the implications of a possible blazar origin for the KM3NeT event are discussed.
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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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