⚛️ Category

hep-ex

2503 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

Search for resonant production of pairs of dijet resonances through broad mediators in proton-proton collisions at s\sqrt{s} = 13 TeV

Using 138 fb−1^{-1} of 13 TeV proton-proton collision data from the CMS experiment, this study reinterprets a prior narrow-resonance search to constrain broad mediators decaying into dijet pairs, revealing local excesses with significances up to 3.9 standard deviations at four-jet masses of 8.6 TeV and 3.6 TeV that remain robust across varying resonance widths.

CMS Collaboration2026-10-28
⚛️ high-energy experiments

An end-to-end framework for uncertainty-aware validation of generative models

This paper introduces SIGMA, an end-to-end framework that integrates density estimation with principled uncertainty quantification via Gaussian mixture models and a composite goodness-of-fit test, enabling robust validation of generative models in physical sciences by distinguishing genuine mismodeling from statistical estimation errors.

Giada Badaracco, Sean Benevedes, Christina Reissel, Philip Harris, Gaia Grosso2026-10-28
⚛️ high-energy experiments

What the Primary Lund Plane Omits: A Model-Stitching Diagnosis of a Jet-Tagger Representation Gap

This paper employs model stitching to demonstrate that the performance gap between Lund-plane and Particle Transformer jet taggers stems from a representational deficiency in the primary declustering branch—specifically its failure to capture critical information from secondary splittings near the top mass—rather than from limitations in downstream computation.

Saurabh Rai, Sanmay Ganguly2026-10-28
⚛️ high-energy experiments

Projected sensitivity to the ADD large extra dimensions model in the monojet plus missing transverse momentum final state at HL-LHC, HE-LHC, and FCC-hh

This paper presents a unified projection of the sensitivity to the ADD large extra dimensions model via the monojet plus missing transverse momentum channel at the HL-LHC, HE-LHC, and FCC-hh, utilizing a novel energy-scaling method for backgrounds and a transparent calibration against ATLAS Run-2 data to establish improved 95% CL exclusion and 5σ\sigma discovery reach in the fundamental scale MDM_D.

Emine Gurpinar Guler (Konya Technical University)2026-10-28
⚛️ high-energy experiments

Search for Neutrino-Produced Long-Lived Particles Using the SBND Cosmic Ray Tagger Beam Telescope

This paper presents the first search for long-lived particles decaying into electron-positron pairs using data from the standalone SBND Cosmic Ray Tagger Beam Telescope, finding no significant excess above background and setting 90% confidence-level upper limits on the effective production cross section at the level of 10−3810^{-38} cm2^2 for decay lengths between 0.3 and 100 meters.

R. Acciarri, L. Aliaga-Soplin, D. Andrade Aldana, C. Andreopoulos, A. Antonakis, S. Balasubramanian, A. Barnard, V. Basq (…)2026-10-28
⚛️ nuclear experiments

Improved nonflow control for multiparticle correlators and system-size-dependent evolution from OO to Pb--Pb collisions at the LHC

This paper validates an improved nonflow subtraction framework using the v1v_1-estimator-based scaling method to reliably extract symmetry plane correlators and symmetric cumulants, enabling a systematic comparison of system-size-dependent evolution from light-ion (OO) to heavy-ion (Pb--Pb) collisions at the LHC.

Neelkamal Mallick, Suraj Prasad2026-10-28
⚛️ high-energy experiments

Analysis of CONUS+ run 2: Detector performance, background model and CEν\nuNS measurement

This paper presents the analysis of the CONUS+ run 2 dataset, which utilizes upgraded high-purity germanium detectors with significantly improved energy thresholds and reduced backgrounds to achieve a 10.2 σ\,\sigma observation of coherent elastic neutrino-nucleus scattering (CEν\nuNS) from reactor antineutrinos, yielding a signal measurement consistent with Standard Model predictions.

N. Ackermann (CONUS+ Collaboration), H. Bonet (CONUS+ Collaboration), C. Buck (CONUS+ Collaboration), J. Hakenmüller (CO (…)2026-10-28
⚛️ nuclear theory

Phenomenology of strangeness-changing two-body currents in antineutrino scattering

This paper calculates the energy-dependent ratio of strangeness-changing two-body to quasi-elastic hyperon production cross sections in antineutrino scattering, finding values between 0.14 and 0.22 that replace the fixed 15% placeholder in the StrangeMC generator and significantly impact the identification and energy reconstruction of strange hadron events in neutrino detectors.

Jarosalw A. Nowak2026-10-28
⚛️ high-energy experiments

High significance measurement of reactor coherent elastic neutrino-nucleus scattering on germanium by CONUS+

The CONUS+ collaboration reports the most precise measurement to date of coherent elastic neutrino-nucleus scattering from reactor antineutrinos, achieving a 10.2σ\sigma significance with 1555 observed events that align with Standard Model predictions and yield a consistent determination of the weak mixing angle.

N. Ackermann (CONUS+ Collaboration), H. Bonet (CONUS+ Collaboration), C. Buck (CONUS+ Collaboration), J. Hakenmüller (CO (…)2026-10-28