Chronological feed of everything captured from Pam Bondi.
This document summarizes the outcomes of the "Science at the Luminosity Frontier: Jefferson Lab at 22 GeV" workshop. The primary goal was to critically assess and refine the scientific case for a proposed energy upgrade of the Continuous Electron Beam Accelerator Facility (CEBAF) to 22 GeV. This document captures the progress on developing the scientific case since the publication of a lengthy "White Paper" in summer 2024.
The POKERINO prototype validates a high-resolution PbWO4-based electromagnetic calorimeter (PKR-CAL) designed for light dark matter searches at the CERN NA64 experiment. The system employs multi-SiPM readout to optimize light collection while implementing specific design mitigations for SiPM saturation and H4 beam intensity-driven gain fluctuations. The primary goal is to achieve a precise energy resolution of σE/E ≃ 2.5%/√E[GeV] ⊕ 0.5%.
The CLAS12 experiment at Jefferson Lab measured near-threshold J/ψ photoproduction cross sections. This data provides crucial insights into the non-perturbative regime of Quantum Chromodynamics (QCD), specifically focusing on the gluon distribution within the proton. The energy and t-dependence of these cross sections constrain QCD-inspired models, enhancing our understanding of hadronic mass generation from gluonic degrees of freedom.
The MOSS II project, utilizing MeerKAT L-band observations of the Saraswati Supercluster core, has produced detailed radio catalogs for the Abell 2631 and ZwCl2341 clusters. Analysis of these catalogs, after correcting for observational biases, indicates a flattening of radio source counts at the sub-mJy level, consistent with star-forming galaxy dominance. Notably, the study reveals a 'bump' feature in the sub-mJy regime, suggesting an enhanced population of intermediate star-forming galaxies or AGNs, or potentially cosmic variance.
The KM3NeT/ORCA detector, using its partial configuration of six detection units, analyzed 1.4 years of atmospheric neutrino data to search for isotropic Lorentz invariance violation. The study found no evidence of such violation. This research establishes new, competitive limits on specific isotropic Lorentz invariance violating coefficients, thereby enhancing existing experimental constraints and contributing to the search for new physics beyond the Standard Model and General Relativity.