hep-ex papers | Gist.Science

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 squarks and gluinos in $pp$ collisions at $\sqrt{s} = 13$ TeV and $13.6$ TeV in events with $τ$ -leptons, jets and missing transverse momentum using the ATLAS detector

Using the ATLAS detector, this paper presents a search for R-parity-conserving supersymmetry in proton-proton collisions at 13 and 13.6 TeV involving tau-leptons, jets, and missing transverse momentum, which excludes gluino masses below 2.25 TeV and squark masses up to 1.7 TeV based on 140 fb⁻¹ and 51.8 fb⁻¹ of data.

ATLAS Collaboration2026-02-09

⚛️ high-energy experiments

Search for heavy neutral leptons in $π^+$ decays to positrons

The NA62 experiment at CERN reports a search for heavy neutral leptons in $\pi^+ \to e^+ N$ decays using 2017–2024 data, establishing upper limits on the mixing element $|U_{e4}|^2$ at the level of $10^{-8}$ for particle masses between 95 and 126 MeV/ $c^2$ .

NA62 Collaboration2026-02-09

⚛️ phenomenology

Reassessing the gallium anomaly using self-consistent electron wave functions

This paper reassesses the long-standing gallium anomaly by calculating neutrino capture cross sections using self-consistent electron wave functions derived from the Dirac-Coulomb equation, thereby updating the global significance of the discrepancy and its interpretation regarding sterile neutrinos.

M. Cadeddu, N. Cargioli, G. Carotenuto, F. Dordei, L. Ferro, C. Giunti2026-02-09

⚛️ high-energy experiments

Quark polarization and transverse momentum effects on double quarkonium production in hadronic collisions

This paper investigates double quarkonium production in polarized hadronic collisions using the Color-Singlet Model and TMD factorization to demonstrate that measuring azimuthal modulations in specific kinematic regions at COMPASS and AMBER can provide direct access to quark distributions and enable a further test of the quark Sivers function sign change.

Carlo Flore, Cristian Pisano2026-02-09

⚛️ high-energy experiments

Neutrino mass ordering in JUNO at risk from scalar NSI induced resonance

This paper demonstrates that the JUNO experiment's ability to determine the neutrino mass ordering could be severely compromised or completely lost due to a previously unrecognized resonant enhancement of the mixing angle $\theta_{12}$ induced by scalar non-standard neutrino interactions.

Sandhya Choubey, Andreas Lund2026-02-09

⚛️ high-energy experiments

Scalar Tsunamis from Black Hole Formation

This paper refines estimates of energy released as "scalar tsunamis" when light scalar fields surrounding collapsing stars are liberated upon black hole formation, demonstrating that while the total energy remains comparable to flat-space predictions, general relativity and improved initial modeling significantly alter the resulting energy spectrum.

Arturo de Giorgi, Yeray Garcia del Castillo, Joerg Jaeckel2026-02-09

⚛️ high-energy experiments

Precise measurement of the $t\bar{t}$ production cross-section and lepton differential distributions in $eμ$ dilepton events

Using 140 fb $^{-1}$ of ATLAS data from 13 TeV proton-proton collisions, this paper presents precise measurements of inclusive and differential $t\bar{t}$ cross-sections in $e\mu$ dilepton events, which are utilized to determine the top-quark pole mass and provide complementary $e\mu b\bar{b}$ production results.

Dominic Hirschbuehl2026-02-09

⚛️ high-energy experiments

Parametric-Resonance Production of QCD Axions

This paper demonstrates that primordial temperature fluctuations modulate the axion mass during the QCD phase transition to trigger parametric resonance, which significantly enhances axion production and shifts the viable dark matter mass window to the higher range of $10^{-4}-10^{-3} \, \text{eV}$ .

Pirzada, Yu Gao, Qiaoli Yang2026-02-09

⚛️ high-energy experiments

Rescattering-induced $D\to SS$ weak decays

This paper investigates two-body non-leptonic $D\to SS$ weak decays, demonstrating that long-distance triangle rescattering processes mediated by pion exchange dominate over negligible short-distance contributions, and provides theoretical predictions for branching fractions of specific channels to guide future experimental studies at BESIII, Belle(-II), and LHCb.

Yan-Li Wang, Shu-Ting Cai, Yu-Kuo Hsiao2026-02-06

⚛️ high-energy experiments

Enhancing Photon Identification with Neural Network Methods

This paper demonstrates that a ResNet-based convolutional neural network, augmented with soft scoring and an auxiliary regression head, significantly outperforms traditional boosted decision trees and dense neural networks in discriminating photons from pions amidst overlapping electromagnetic showers in high-luminosity collider environments.

Yuval Frid, Liron Barak2026-02-06

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hep-ex

Search for squarks and gluinos in $pp$ collisions at s=13\sqrt{s} = 13s​=13 TeV and $13.6$ TeV in events with τττ-leptons, jets and missing transverse momentum using the ATLAS detector

Search for heavy neutral leptons in π+π^+π+ decays to positrons

Reassessing the gallium anomaly using self-consistent electron wave functions

Quark polarization and transverse momentum effects on double quarkonium production in hadronic collisions

Neutrino mass ordering in JUNO at risk from scalar NSI induced resonance

Scalar Tsunamis from Black Hole Formation

Precise measurement of the ttˉt\bar{t}ttˉ production cross-section and lepton differential distributions in eμeμeμ dilepton events

Parametric-Resonance Production of QCD Axions

Rescattering-induced D→SSD\to SSD→SS weak decays

Enhancing Photon Identification with Neural Network Methods

Search for squarks and gluinos in $pp$ collisions at $\sqrt{s} = 13$ TeV and $13.6$ TeV in events with $τ$ -leptons, jets and missing transverse momentum using the ATLAS detector

Search for heavy neutral leptons in $π^+$ decays to positrons

Precise measurement of the $t\bar{t}$ production cross-section and lepton differential distributions in $eμ$ dilepton events

Rescattering-induced $D\to SS$ weak decays