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

The $B^+ \to K^+ \nu \bar \nu$ decay as a QCD axion search: comparing reinterpretation approaches

This paper demonstrates that the four-fold discrepancy in recent limits on the $B^+ \to K^+ a$ decay arises from the choice of kinematic variables, showing that fine-grained binning in the reconstructed di-neutrino invariant mass ( $q^2_{\rm rec}$ ) is essential for resolving narrow axion signals while BDT-based approaches dilute sensitivity, thereby advocating for the publication of likelihoods in physical variable spaces to ensure robust reinterpretability.

Merna Abumusabh, Giulio Dujany, Diego Guadagnoli, Méril Reboud, Claudio Toni2026-06-19

⚛️ high-energy experiments

Observation of electroweak production of pairs of Z bosons in proton-proton collisions at 13 TeV

The CMS experiment reports the first evidence of electroweak production of Z boson pairs in association with two jets using 138 fb $^{-1}$ of proton-proton collision data at 13 TeV, observing a significance of 3.1 standard deviations that rises to 5.0 standard deviations when combined with the four-lepton channel.

CMS Collaboration2026-06-19

⚛️ high-energy experiments

Operation of a Modular 3D-Pixelated Liquid Argon Time-Projection Chamber in a Neutrino Beam

This paper presents the design, commissioning, and initial physics results of the 2x2 Demonstrator, a modular 3D-pixelated liquid argon time-projection chamber prototype for the DUNE Near Detector, which successfully recorded over 30,000 neutrino interactions in a 2024 NuMI beam run.

DUNE Collaboration, S. Abbaslu, A. Abed Abud, R. Acciarri, L. P. Accorsi, M. A. Acero, M. R. Adames, G. Adamov, M. Adamo (…)2026-06-18

⚛️ high-energy experiments

Search for dark matter production in association with bottom quarks and a lepton pair in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Using 138 fb $^{-1}$ of 13 TeV proton-proton collision data, the CMS collaboration performed a first-of-its-kind search for dark matter production associated with bottom quarks and a lepton pair within a 2HDM+a framework, finding no evidence of new physics and setting stringent upper limits on the production cross-sections of heavy Higgs bosons and pseudoscalar mediators.

CMS Collaboration2026-06-18

⚛️ high-energy experiments

Observation of the radiative decay $D_s (2317)^+ \to D_s^* γ$

Using combined data from the Belle and Belle II experiments, researchers have observed the radiative decay $D^{*}_{s0}(2317)^{+} \to D_{s}^{*+} \gamma$ for the first time with high significance and measured its branching fraction ratio relative to the $D_{s}^{+} \pi^{0}$ mode, providing crucial new constraints on the particle's internal quark structure.

Belle II Collaboration, M. Abumusabh, I. Adachi, L. Aggarwal, H. Ahmed, Y. Ahn, H. Aihara, N. Akopov, S. Alghamdi, M. Al (…)2026-06-18

⚛️ high-energy experiments

HadroTOPS: A Monte Carlo Event Generator For Hadron Production In Two-Photon Scattering In Electron Positron Collisions

The paper introduces HadroTOPS, a flexible Monte Carlo event generator designed to simulate hadronic two-photon fusion events in electron-positron collisions with exact leading-order QED coupling and customizable phase space decays, specifically supporting partial wave analyses for various final states relevant to collaborations like BESIII.

Max Lellmann, Igor Danilkin, Achim Denig, Jan Muskalla, Christoph F. Redmer, Xiu-Lei Ren, Marc Vanderhaeghen2026-06-18

⚛️ high-energy experiments

KANELÉ: Kolmogorov-Arnold Networks for Efficient LUT-based Evaluation

This paper introduces KANELÉ, a framework that leverages the discretization-friendly structure of Kolmogorov-Arnold Networks (KANs) to enable highly efficient, low-latency FPGA inference through a co-optimized design flow for quantization and pruning.

Duc Hoang, Aarush Gupta, Philip Harris2026-06-18

⚛️ high-energy experiments

Search for pair production of heavy resonances in final states with a photon and large-radius jets in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Using 138 fb $^{-1}$ of proton-proton collision data at $\sqrt{s}$ = 13 TeV collected by the CMS detector, this paper presents the first search for the pair production of heavy spin-1/2 or spin-3/2 resonances decaying into a top quark, a photon, a top quark, and a gluon, setting 95% confidence level exclusion limits on resonance masses below 930 GeV and 1330 GeV for spin-1/2 and spin-3/2 scenarios, respectively.

CMS Collaboration2026-06-18

⚛️ high-energy experiments

Standard Candles for Supernova Neutrino Detection at DUNE

This paper proposes a data-driven calibration strategy using $^8$ B solar neutrinos and muon-decay-at-rest neutrinos as standard candles to constrain the poorly known electron neutrino-argon cross section, thereby significantly reducing model-dependent biases in extracting Galactic supernova spectral properties at the DUNE experiment.

Ting Cheng, Matheus Hostert, Pedro A. N. Machado, Nityasa Mishra, Adrian Thompson2026-06-18

⚛️ high-energy experiments

Polarization analysis of $χ_{cJ}$ decay into octet baryonic pairs

This paper presents a comprehensive spin density matrix analysis of polarization transfer in polarized $e^+e^-$ collisions producing $\chi_{cJ}$ decays into octet baryon-antibaryon pairs, confirming theoretical predictions for angular distributions and demonstrating how longitudinal beam polarization at future facilities like the STCF can serve as a new experimental tool to test decay mechanisms and explore baryonic spin entanglement.

Cai-Ying Pang, Rong-Gang Ping, Dai-Hui Wei2026-06-18

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hep-ex

The B+→K+ννˉB^+ \to K^+ \nu \bar \nuB+→K+ννˉ decay as a QCD axion search: comparing reinterpretation approaches

Observation of electroweak production of pairs of Z bosons in proton-proton collisions at 13 TeV

Operation of a Modular 3D-Pixelated Liquid Argon Time-Projection Chamber in a Neutrino Beam

Search for dark matter production in association with bottom quarks and a lepton pair in proton-proton collisions at s\sqrt{s}s​ = 13 TeV

Observation of the radiative decay Ds(2317)+→Ds∗γD_s (2317)^+ \to D_s^* γDs​(2317)+→Ds∗​γ

HadroTOPS: A Monte Carlo Event Generator For Hadron Production In Two-Photon Scattering In Electron Positron Collisions

KANELÉ: Kolmogorov-Arnold Networks for Efficient LUT-based Evaluation

Search for pair production of heavy resonances in final states with a photon and large-radius jets in proton-proton collisions at s\sqrt{s}s​ = 13 TeV

Standard Candles for Supernova Neutrino Detection at DUNE

Polarization analysis of χcJχ_{cJ}χcJ​ decay into octet baryonic pairs

The $B^+ \to K^+ \nu \bar \nu$ decay as a QCD axion search: comparing reinterpretation approaches

Search for dark matter production in association with bottom quarks and a lepton pair in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Observation of the radiative decay $D_s (2317)^+ \to D_s^* γ$

Search for pair production of heavy resonances in final states with a photon and large-radius jets in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Polarization analysis of $χ_{cJ}$ decay into octet baryonic pairs