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.

Probing CP-violating Higgs-Gauge couplings with Higgsstrahlung at $e^-e^+$ collider

This paper investigates the sensitivity of a future 250 GeV $e^-e^+$ collider to CP-violating and CP-conserving anomalous Higgs-gauge couplings within the SMEFT framework, demonstrating that utilizing beam polarization and spin-correlation asymmetries across dominant Higgs decay channels can achieve sub-percent precision on dimension-6 operator coefficients, provided systematic uncertainties are controlled below the few-percent level.

Amir Subba, Subhaditya Bhattacharya, Abhik Sarkar2026-03-31⚛️ hep-ex

Quark-Lepton Unification Signatures

This paper investigates the collider signatures of a minimal quark-lepton unification framework at the electroweak scale, which generates neutrino masses via an inverse seesaw mechanism and predicts a rich spectrum of new particles—particularly third-generation leptoquarks—that offer distinct experimental prospects for the Large Hadron Collider.

Jon Butterworth, Hridoy Debnath, Pavel Fileviez Perez, Peng Wang2026-03-31⚛️ hep-ex

Dijet bounds on third-generation four-quark operators

This paper utilizes LHC dijet measurements, incorporating two-loop renormalization group effects, to establish constraints on ten third-generation four-quark operators, yielding nominal or comparable bounds for bottom-quark operators while leaving limits on the remaining operators weak.

Maximilian Freiheit, Ulrich Haisch2026-03-31⚛️ hep-ex

Measurement of inclusive $B \to X_u \ell \nu$ partial branching fractions and $|V_{ub}|$ at Belle II

Using 365 fb $^{-1}$ of data from the Belle II experiment, this study measures the partial branching fraction of inclusive charmless semileptonic $B$ meson decays with lepton energies above 1 GeV to determine the CKM matrix element $|V_{ub}|$ as $(4.01 \pm 0.19 ^{+0.07} _{-0.08}) \times 10^{-3}$ , a result consistent with the world average from previous inclusive measurements.

Belle II Collaboration, M. Abumusabh, I. Adachi, K. Adamczyk, L. Aggarwal, H. Ahmed, Y. Ahn, H. Aihara, N. Akopov, S. Alghamdi, M. Alhakami, A. Aloisio, N. Althubiti, K. Amos, N. Anh Ky, C. Antonioli (…)2026-03-31⚛️ hep-ex

Differential measurements of $\bar{t}tZ$ and $\bar{t}t\bar{t}t$ at large $Q^2$ at FCC-hh

This paper presents a study of differential $\bar{t}tZ$ and $\bar{t}t\bar{t}t$ measurements at the FCC-hh with 30 ab $^{-1}$ of data at 84 TeV, demonstrating the feasibility of probing high- $Q^2$ regimes for new physics with significant precision and highlighting the benefits of optimized lepton isolation for boosted object reconstruction.

Louise Beriet, Matteo Defranchis, Birgit Stapf, Michele Selvaggi2026-03-31⚛️ hep-ex

Semiautomatic dimensional screening of plastic scintillator cubes using image analysis and robotics

The authors developed and validated a semiautomatic system combining robotics, high-resolution imaging, and image analysis to efficiently screen 1 cm³ plastic scintillator cubes for future neutrino detectors, achieving 10 μm precision, over 80% consistency with manual screening, and a 3.1% rejection rate.

Tatsuya Kikawa, Mao Tani, Atsuko K. Ichikawa, Tsunayuki Matsubara, Tsuyoshi Nakaya, Tomohisa Ogawa2026-03-31⚛️ hep-ex

Universal Geometric Scaling in Cosmic Ray Spallation: Evidence of a Dynamical Causal Horizon from AMS-02

This paper proposes that high-energy cosmic ray spallation ratios observed by AMS-02 converge to energy-independent plateaus due to a dynamical causal horizon generating a universal thermal bath with an effective temperature of approximately 5.6–6.1 MeV, which supersedes traditional kinematic models.

Yi Yang2026-03-31⚛️ hep-ph

Pushing the Limits of Pulse Shape Discrimination in a Large Liquid Xenon Detector

This paper presents an optimized analysis framework for Pulse Shape Discrimination (PSD) in the LUX-ZEPLIN (LZ) experiment that, when combined with charge-to-light measurements into a two-factor discrimination method, significantly reduces electronic recoil background leakage and false positive rates in the search for dark matter.

D. S. Akerib, A. K. Al Musalhi, F. Alder, B. J. Almquist, C. S. Amarasinghe, A. Ames, T. J. Anderson, N. Angelides, H. M. Araújo, J. E. Armstrong, M. Arthurs, A. Baker, S. Balashov, J. Bang, J. W. B (…)2026-03-31⚛️ hep-ex

The Physics and Prospects of Super-Tau Charm Factories

This review paper outlines the physics prospects of proposed Super Tau-Charm Factories, highlighting their unique capabilities in high-luminosity electron-positron collisions to advance precision tests of the Standard Model, explore CP violation, study tau and charm properties, and investigate nonperturbative QCD phenomena.

Alexey A. Petrov, Yangheng Zheng2026-03-31⚛️ nucl-ex

Xenon Signal Denoising via Supervised, Semi-Supervised, and Unsupervised Models

This study demonstrates that supervised, semi-supervised, and unsupervised machine learning models can effectively denoise simulated single-phase liquid xenon time projection chamber signals to achieve energy resolutions of approximately 1% or better, offering a promising path toward enhancing the sensitivity of neutrinoless double beta decay searches.

Grant Kendrick Parker, Jason Brodsky, Indra Chakraborty2026-03-31⚛️ nucl-ex

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hep-ex

Probing CP-violating Higgs-Gauge couplings with Higgsstrahlung at e−e+e^-e^+e−e+ collider