⚛️ Category

hep-ex

2610 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.

⚛️ high-energy experiments

Temperature dependence of the long-term annealing behavior of neutron irradiated diodes from 8-inch p-type silicon wafers

This study investigates the isothermal annealing behavior of neutron-irradiated p-type silicon pad diodes from 8-inch wafers across a range of fluences and temperatures to extract annealing time constants, thereby improving the Hamburg model's ability to predict long-term radiation damage effects in the CMS High-Granularity Calorimeter sensors for the High-Luminosity LHC.

Leena Diehl, Oliwia Kaluzinska, Marie Mühlnikel, Max Andersson, Natalya Gerassyova, Jenan Amer, Eva Sicking, Dana Groner (…)2026-02-24
⚛️ high-energy experiments

Deploying a Hybrid PVFinder Algorithm for Primary Vertex Reconstruction in LHCb's GPU-Resident HLT1

This paper presents the development and integration of a hybrid deep neural network for primary vertex reconstruction into LHCb's GPU-resident HLT1 framework, detailing the challenges of real-time constraints and data layout translation while outlining a roadmap for significant performance improvements through mixed-precision computing and model compression.

Simon Akar, Mohamed Elashri, Conor Henderson, Michael Sokoloff2026-02-24
⚛️ high-energy experiments

Observation of ttˉγγt\bar{t}γγ production at s=\sqrt{s}=13 TeV with the ATLAS detector

Using 140 fb−1^{-1} of proton-proton collision data at s=13\sqrt{s}=13 TeV collected by the ATLAS detector, this paper reports the first observation of top-quark pair production in association with two photons (ttˉγγt\bar{t}\gamma\gamma) with a significance of 5.2 standard deviations and measures its fiducial cross section to be 2.42−0.53+0.582.42^{+0.58}_{-0.53} fb.

ATLAS Collaboration2026-02-23
⚛️ high-energy experiments

First evidence of CPCP violation in beauty baryon to charmonium decays

Using LHCb data from 2015–2018, researchers observed the first evidence of CP violation in beauty baryon decays to charmonium, measuring a combined asymmetry difference of 4.31±1.06±0.28%4.31 \pm 1.06 \pm 0.28\% with a significance of 3.9σ3.9\sigma.

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. Adefisoye, B. A (…)2026-02-23
⚛️ nuclear experiments

Development and Application of an eV Neutron Polarization for Parity Violation Studies at CSNS Back-n Beamline

Researchers at the China Spallation Neutron Source successfully developed and validated an eV-range polarized neutron system using an in-situ 3^3He Spin-Exchange Optical Pumping filter and solenoidal guide field, achieving a measured parity violation asymmetry of 7.8±2.47.8 \pm 2.4% at the 0.747 eV resonance of 139^{139}La to support future Time-Reversal Invariance Violation studies.

Xu Qin, Tianhao Wang, Xuanbo Chen, Changdong Deng, Yongce Gong, Zenghang Huang, Wei Jiang, Zhengquan Liu, Guangyuan Luan (…)2026-02-23
⚛️ high-energy experiments

Hardware-Aware Design of a GNN-Based Hit Filtering Algorithm for the Belle II Level-1 Trigger

This paper presents a hardware-aware model-compression workflow for a GNN-based hit-filtering algorithm deployed on FPGAs in the Belle II Level-1 trigger, achieving a reduction in computational cost by over two orders of magnitude through techniques like 4-bit fixed-point arithmetic and pruning while maintaining high hit efficiency and background rejection performance.

Greta Heine, Fabio Mayer, Marc Neu, Jürgen Becker, Torben Ferber2026-02-23
⚛️ high-energy experiments

Long-range transverse momentum correlations and radial flow in Pb$-$Pb collisions at the LHC with ALICE

This ALICE study introduces the new observable v0(pT)v_{0}(p_\mathrm{T}) to measure long-range transverse momentum correlations in Pb-Pb collisions at 5.02 TeV, revealing mass-dependent flow patterns consistent with hydrodynamics and quark recombination while demonstrating its sensitivity to bulk viscosity and the equation of state for constraining the properties of strongly interacting matter.

ALICE Collaboration2026-02-20