paper / sacca / 29d ago
Provides a framework for compactifying quasi-projective Lagrangian fibrations over holomorphic symplectic varieties, including a compactification criterion applicable to fibrations of geometric origin. Discusses holomorphic forms defined via correspondences in geometric examples. Proves existence of a (possibly singular) holomorphic symplectic compactification for the Albanese fibration over V (with codim ≥2 complement) and isogenous torsors or smooth commutative group schemes with connected fibers.
algebraic-geometrylagrangian-fibrationsholomorphic-symplecticcompactificationalbanese-fibrationquasi-projective
“A general framework exists for compactifying quasi-projective Lagrangian fibrations of geometric origin by holomorphic symplectic varieties.”
paper / sacca / 29d ago
The paper analyzes cohomology classes of sections in the universal Jacobian fibration over lines from a linear system |H| on a smooth surface S. For K3 surfaces S, the universal compactified Jacobian forms a hyperkähler manifold. The authors' results challenge certain steps in the [BKV25] paper, creating a noted incompatibility. A v2 revision corrects a cohomology notation typo from H^g to H^{2g}.
arxiv-paperalgebraic-geometryjacobian-fibrationsk3-surfaceshyperkähler-manifoldsmath-ag
“The paper studies cohomology classes of sections of the universal Jacobian over lines in a linear system |H| on a smooth surface S.”
paper / sacca / 29d ago
ALICE's ITS2, deployed in LHC Run 3, pioneers large-scale MAPS with 24,120 sensors totaling 12.6e9 pixels, 10 m² area, 5 μm resolution, and 0.36% X0 budget in inner layers. It enhances pointing resolution, low-pT tracking, and readout rates over predecessors. Calibration targets in-pixel thresholds and noisy pixel masking, with methods enabling monitoring and dynamic adjustment of performance parameters across the massive array.
alice-experimentits2lhcrun3maps-technologysensor-calibrationpixel-detectorsdetector-monitoring
“ITS2 uses silicon MAPS with pixel size 26.88 × 29.24 μm² and intrinsic spatial resolution of ~5 μm”
paper / sacca / 29d ago
The JEM-EUSO Collaboration submitted a collection of papers to the 39th International Cosmic Ray Conference (ICRC 2025) in Geneva, Switzerland, from July 14-24, 2025. This arXiv preprint aggregates contributions from over 70 authors, focusing on high-energy astrophysical phenomena and astrophysical instrumentation. It documents ongoing advancements in space-based observation of extreme-energy cosmic rays via fluorescence and Cherenkov light detection.
jem-eusocosmic-raysicrc-2025high-energy-astrophysicsastroparticle-physicsscientific-collaboration
“JEM-EUSO Collaboration presented papers at the 39th ICRC in Geneva, July 14-24, 2025”