⚛️ Category

hep-ex

2131 papers

Hep-Ex explores the fascinating intersection where particle physics meets experimental reality. This field investigates how scientists build massive detectors and accelerate particles to test the fundamental laws of nature, turning abstract theories into measurable data. It is the rigorous process of searching for new particles or forces that could reshape our understanding of the universe, often requiring years of collaboration and engineering.

At Gist.Science, we ensure these discoveries become accessible to everyone. We process every new preprint in this category directly from arXiv, generating both plain-language explanations for curious readers and detailed technical summaries for specialists. Our goal is to bridge the gap between complex experimental results and public understanding without losing scientific nuance.

Below are the latest papers in Hep-Ex, freshly summarized and ready for you to explore.

🔬 atomic physics

Highly Excited Electron Cyclotron for QCD Axion and Dark-Photon Detection

This paper proposes a significantly enhanced detection scheme for meV-scale QCD axions and dark photons using highly excited cyclotron states of a trapped electron within an open-endcap trap, achieving background-free sensitivity to the predicted post-inflationary QCD axion mass range (0.1–2.3 meV) and dark photon kinetic mixing parameters as low as ϵ≈2×10−16\epsilon \approx 2 \times 10^{-16} through optimized experimental parameters and dielectric-enhanced cavities.

Xing Fan, Gerald Gabrielse, Peter W. Graham, Harikrishnan Ramani, Samuel S. Y. Wong, Yawen Xiao2026-05-18
⚛️ high-energy experiments

Neural simulation-based inference of the Higgs trilinear self-coupling via off-shell Higgs production

This paper proposes a hybrid neural simulation-based inference approach to constrain the Higgs trilinear self-coupling and other SMEFT operators using off-shell Higgs production at the High-Luminosity LHC, achieving near-theoretical-optimal sensitivity by combining matrix-element-enhanced training with classification-based background estimation.

Aishik Ghosh, Maximilian Griese, Ulrich Haisch, Tae Hyoun Park2026-05-18
⚛️ high-energy experiments

Overlap-aware segmentation for topological reconstruction of obscured objects

This paper introduces OASIS, a novel segmentation-regression framework that employs a weighted loss function to prioritize overlapping regions during training, significantly improving the intensity and topological reconstruction of faint, obscured electron tracks in the challenging context of the MIGDAL experiment.

J. Schueler, H. M. Araújo, S. N. Balashov, J. E. Borg, C. Brew, F. M. Brunbauer, C. Cazzaniga, A. Cottle, D. Edgeman, C. (…)2026-05-18
⚛️ high-energy experiments

Flavor-physics benchmarks for tracker-based particle identification at the FCC-ee

This paper benchmarks the flavor-physics particle identification performance of the proposed CLD and IDEA detectors at the FCC-ee, demonstrating that while silicon tracker-based timing and energy-deposit measurements effectively suppress backgrounds for low-momentum hadrons, accessing drift-chamber cluster counts is essential for high-momentum light-quark jet tagging, with optimal results requiring timing resolutions of 30ps or better.

Anja Beck, Eluned Smith2026-05-18
⚛️ high-energy experiments

Any Light Particle Searches with ALPS II: first science results

The ALPS II experiment at DESY conducted its first science campaign from February to May 2024, achieving a 20-fold improvement in sensitivity limits for axion-like particles without finding evidence of their existence, while demonstrating stable operation and preparing for future upgrades to further enhance detection capabilities.

Daniel C. Brotherton, Zachary R. Bush, Sandy Croatto, Mauricio Diaz-Ortiz, Jacob Egge, Aldo Ejlli, Henry Frädrich, Joe G (…)2026-05-18✓ Author reviewed ⓘ
⚛️ nuclear theory

Sivers Tomography from Charge and Angle Only

This paper proposes a theoretically clean and experimentally simple "one-point charge-correlator" probe for measuring the Sivers effect in back-to-back deep-inelastic scattering using only charged track signs and directions, which achieves factorization without relying on non-perturbative fragmentation functions and provides high-precision resummed predictions for future Electron-Ion Collider experiments.

Haotian Cao, Xiaohui Liu, Frank Petriello2026-05-18
⚛️ high-energy experiments

Predicting Three Generations of Fermions: Discovery Prospects of the Bilepton Model

This paper investigates the discovery potential of doubly-charged bileptons at the High-Luminosity LHC through direct pair production and heavy-quark-mediated channels, demonstrating that the latter offers significantly enhanced sensitivity capable of achieving a 5σ5\sigma discovery for heavy quark masses up to 2.5 TeV and bilepton masses up to 2 TeV due to a distinctive, background-free four-lepton signature.

Andreas Crivellin, Paul H. Frampton, Ahmed Hammad2026-05-18