2160 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.
This paper proposes installing a dedicated liquid hydrogen or liquid deuterium target within the BESIII detector to significantly enhance the statistical precision of (anti)hyperon-nucleon and antineutron-nucleon interaction measurements, thereby advancing the understanding of non-perturbative strong interactions.
Using the full Run 2 and early Run 3 datasets from the ATLAS detector, this study searches for direct top squark pair production in events with two oppositely charged leptons, -jets, and missing transverse momentum, finding no significant excess over Standard Model predictions and setting improved 95% confidence level mass limits of up to 1060 GeV for top squarks and 560 GeV for neutralinos.
This report details the results of a survey conducted by the ECFA Early-Career Researchers Panel to assess the accessibility and quality of training programs in software and machine learning for instrumentation, aiming to guide improvements for early-career researchers in experimental physics.
This paper proposes a framework combining lattice QCD inputs with first-order symmetry breaking to predict specific branching ratio measurements for semileptonic decays that can definitively determine whether the observed large symmetry breaking stems from unexpected hadronic mechanisms or new physics.
Using 140 fb of 13 TeV proton-proton collision data collected by the ATLAS detector, this paper presents the first measurement of the CKM matrix element from on-shell -boson decays in top quark pairs, yielding a value of that is consistent with existing low-energy determinations while probing a novel high-momentum-transfer physical regime.
This paper presents a theoretical analysis demonstrating that finite size and lifetime effects in heavy-ion collisions modify the momentum-space two-point correlation function of baryon density, resulting in an effective scaling exponent that matches the infinite-system value only within a specific, experimentally accessible momentum range.
This paper presents sensitivity studies for detecting a leptophilic Z' boson at the International Linear Collider and the Linear Collider Facility at CERN, utilizing WHIZARD simulations to evaluate signal and background in the di-muon channel and establish expected limits on Z' couplings to Standard Model leptons at center-of-mass energies of 250 GeV and 550 GeV.
This paper introduces a novel molecular dynamics simulation approach that overcomes traditional Lindhard model limitations by incorporating crystal condensed matter effects to accurately predict ultra-low energy ionization yields in semiconductor detectors, thereby extending dark matter exclusion limits to 0.29 GeV/.
The paper evaluates the feasibility of achieving ~3% precision in coherent elastic neutrino-nucleus scattering measurements using mono-energetic electron-capture neutrinos and a compact array of lithium-based bolometers, a capability that could resolve the gallium neutrino anomaly by distinguishing between nuclear effects, source activity errors, and short-baseline oscillations.
Following a major hardware upgrade at SNOLAB, the SENSEI experiment achieved an order-of-magnitude reduction in single-electron background rates to e/pix/day, enabling tighter constraints on sub-GeV dark matter and validating that previous higher rates were likely caused by light leaks in the older sensor tray design.