⚛️ Category

hep-ex

2101 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

A search for electroweak ttˉWjt\bar{t}Wj production in multileptonic final states at s=13\sqrt{s} = 13 TeV with the ATLAS detector and bounds on effective field theory operators

Using 140 fb⁻¹ of 13 TeV proton-proton collision data collected by the ATLAS detector, this study presents the first direct probe of the tWtW-scattering vertex through a search for electroweak ttˉWjt\bar{t}Wj production in multileptonic final states, establishing a 95% CL upper limit on the cross section and constraining relevant Standard Model Effective Field Theory operators.

ATLAS Collaboration2026-07-07
⚛️ high-energy experiments

Towards the Direct Detection of Composite Ultraheavy Dark Matter in Quantum Sensor Arrays

This paper investigates the sensitivity of quantum sensor arrays to composite ultraheavy dark matter interacting via gravity and a Yukawa force, demonstrating through Monte Carlo analysis that future accelerometer arrays can distinguish between different density profiles and characterize the mass and size of such extended dark matter objects.

Dorian W. P. Amaral, Erqian Cai, Andrew J. Long, Juehang Qin, Christopher D. Tunnell2026-07-07
⚛️ high-energy experiments

Gluon Generalized TMD signatures at the EIC from exclusive heavy (axial-)vector meson production

This paper proposes that exclusive heavy (axial-)vector meson production in lepton-proton collisions at the Electron-Ion Collider can serve as a unique experimental channel to probe the elusive gluon generalized transverse momentum-dependent distributions F1,4gF_{1,4}^g and G1,1gG_{1,1}^g through specific azimuthal-angle-dependent observables arising from virtual-photon polarization interference.

Shohini Bhattacharya, David DeAngelo, Lei Yang, Duxin Zheng, Jian Zhou2026-07-07
⚛️ high-energy experiments

EFT Validity and Truncation Uncertainty from few Nuisance Parameters

This paper proposes an automation-friendly algorithm that utilizes the calculable O(Λ−4)\mathcal{O}(\Lambda^{-4}) contributions in SMEFT to model higher-order truncation uncertainties with a minimal set of nuisance parameters, thereby significantly reducing parameter counts and ensuring EFT validity by constraining bounds to kinematic regions where uncertainties are subdominant.

Benoît Assi, Adam Martin, William Shepherd2026-07-07
⚛️ high-energy experiments

First measurement of flux of the neutron background induced by accelerated neutrinos at the J-PARC facility

This paper reports the first measurement of the neutron background flux induced by the neutrino beam at the J-PARC facility, utilizing BGO and liquid scintillation detectors to determine a flux of approximately 1.45×10−7 cm−2s−1POT−11.45 \times 10^{-7}~\rm{cm}^{-2}\rm{s}^{-1}\rm{POT}^{-1} based on 2.972×10202.972 \times 10^{20} protons on target.

Hiroshi Ito, Ryo Shibayama, Chisako Ise, Akihiro Minamino, Yusuke Koshio, Masaki Ishitsuka2026-07-07
⚛️ nuclear experiments

Studying baryon number transport dynamics via hyperon-kaon correlations in p+Aup + \mathrm{Au} collisions at sNN=20\sqrt{s_{_{\rm NN}}}=20, $39$ and $62$ GeV

This paper utilizes AMPT and UrQMD models to simulate hyperon-kaon correlations in p+Aup + \mathrm{Au} collisions at 20, 39, and 62 GeV, establishing a baseline without baryon junction mechanisms to test theories of baryon number transport and strange quark pair correlations.

Siyuan Ping, Xiaozhou Yu, Long Ma2026-07-07
⚛️ high-energy experiments

Searching for Dark Photons with a room-temperature dielectric haloscope

Using a room-temperature dielectric multilayer haloscope coupled with a sensitive CMOS sensor, researchers conducted a 904-hour search for dark-photon dark matter near 2 eV and, finding no excess events, established a 90% confidence-level upper limit of κ<4.0×10−13\kappa < 4.0\times10^{-13} for a mass of 1.9 eV/c2c^2.

Siyin Li, Paschos Ioannis, Zhengyin Yang, Alexandros Spiliotis, Husheng Guan, Pavlos G. Savvidis, Shengchao Li2026-07-07
⚛️ high-energy experiments

Updated analysis of minimal supersymmetric SO(10) with a universal soft spectrum

This paper updates the analysis of minimal supersymmetric SO(10) grand unification with a universal soft spectrum, revealing that after imposing constraints from gauge coupling unification, proton decay, the Higgs mass, and flavor observables, only a narrow "mini-split" region with heavy scalars (m0≳7.7m_0 \gtrsim 7.7 TeV) and low tan⁡β\tan\beta (≲9\lesssim 9) survives, offering a testable scenario for future proton decay and electroweakino searches.

Cheng-Wei Chiang, Takeshi Fukuyama2026-07-07