⚛️ Category

hep-ex

2092 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.

⚛️ phenomenology

Higgs boson pair production in SMEFT: shape and truncation studies

This paper presents a comparative study of Higgs boson pair production in SMEFT at NLO QCD, demonstrating that while some Wilson coefficient scenarios remain valid under linear truncation, others with large anomalous couplings produce unphysical differential cross sections, thereby exposing the necessity of including quadratic dimension-6 contributions to accurately capture shape distortions in kinematic distributions.

Manosch Bär, Bakar Chargeishvili, Ramona Gröber, Gudrun Heinrich, Konstantin Schmid2026-09-01
⚛️ high-energy experiments

Sensitivity of a Missing-Mass Search for a Light Dark Photon with a Positron Beam on a Hydrogen Target

This paper presents a Geant4-based simulation study evaluating the sensitivity of a proposed missing-mass search for a light dark photon (A′A') using a 500 MeV positron beam on a liquid-hydrogen target at Jefferson Lab, projecting a kinetic-mixing parameter sensitivity of 4×10−84\times10^{-8} for A′A' masses between 7 and 19 MeV.

Weizhi Xiong, Ashot Gasparian, Bogdan Wojtsekhowski2026-09-01
⚛️ high-energy experiments

First Measurement of Solar Neutrinos through Elastic Neutrino-Electron Scattering at the keV Scale

Using 2.46 tonne-years of data from the XENONnT experiment, researchers achieved the first detection of low-energy solar neutrinos via elastic neutrino-electron scattering with a 5.0σ significance, setting a new record for the lowest energy threshold in neutrino detection and measuring a pp neutrino flux consistent with previous Borexino results.

XENON Collaboration, E. Aprile, J. Aalbers, K. Abe, M. Abu Rmilah, M. Adrover, S. Ahmed Maouloud, L. Althueser, B. Andri (…)2026-09-01
⚛️ high-energy experiments

From a Long-standing Prediction to a New Family of Hadrons

This article reviews the evolution of fully charmed tetraquarks from theoretical predictions to a newly established family of hadrons, highlighting recent CMS discoveries by Nanjing Normal University and Tsinghua University teams that confirmed their existence, quantum numbers, and resonance interference, thereby advancing the understanding of nonperturbative Quantum Chromodynamics.

Xining Wang, Kai Yi2026-09-01
⚛️ nuclear experiments

Low-energy Muon-Nucleon scattering experiment: LUNE (White Paper)

This white paper outlines the LUNE experiment at the HIAF facility, which aims to utilize high-intensity muon beams to resolve fundamental questions in nuclear and particle physics, including the proton charge radius puzzle and nucleon structure, through a two-phase program of precision elastic and inelastic scattering measurements.

Chenlei An, Dong Bai, Ziyu Bai, Kai Chen, Liangwen Chen, Xiang Chen, Jianqiao Deng, Yanxin Dou, Yicheng Feng, Zekai Feng (…)2026-09-01
⚛️ high-energy experiments

Photon--Dark Matter Elastic Scattering: An Effective-Operator Scan and First Operator-Resolved Sensitivity Estimates from the Galactic Halo

This paper presents the first operator-resolved sensitivity estimates for photon-dark matter elastic scattering using 17 years of Fermi-LAT data toward the Galactic center, finding that while the method uniquely probes certain dark matter scenarios evading other constraints, its current reach is limited by low cutoff scales and is superseded by existing CMB and direct-detection bounds.

Trinity Rosebud Stenhouse, Asli Acar, Mikhail Bashkanov, Frank F. Deppisch, Chamkaur Ghag, Dan P. Watts2026-09-01
⚛️ high-energy experiments

Searching for Extra Dimensions and Copies of the Standard Model with IceCube

Using 10.7 years of high-energy upward-going muon neutrino data from the IceCube Neutrino Observatory, this study places the strongest or previously unexplored constraints on low-scale gravity scenarios by limiting the compactification radius of large extra dimensions and the number of Standard Model copies.

R. Abbasi, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, J. M. Alameddine, S. Ali, N. M. Amin, K. Andeen, C. Arg{üel (…)2026-09-01
⚛️ phenomenology

The inclusive Bˉ→Xsγ\bar B \to X_s \gamma decay rate with higher precision

This paper presents a high-precision Standard Model prediction for the inclusive Bˉ→Xsγ\bar B \to X_s \gamma decay branching ratio, (3.54±0.14)×10−4(3.54 \pm 0.14)\times 10^{-4}, achieved by incorporating complete O(αs)\mathcal{O}(\alpha_s) corrections and exact O(αs2)\mathcal{O}(\alpha_s^2) charm-mass dependence, which aligns with experimental data and sets a 95% confidence level lower bound of 670 GeV on the charged Higgs boson mass in the Two-Higgs-Doublet Model II.

M. Misiak, H. M. Asatrian, K. Brune, M. Czaja, M. Czakon, M. Fael, C. Greub, T. Huber, F. Lange, L. T. Moos, M. Niggetie (…)2026-09-01