⚛️ 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.

⚛️ high-energy experiments

Constraints on effective field theories via quadruple-differential angular decay rates from tt-channel single-top-quark production at s=13\sqrt{s}=13 TeV with the ATLAS detector

Using 140 fb−1^{-1} of 13 TeV proton-proton collision data collected by the ATLAS detector, this study employs Fourier techniques on quadruple-differential angular decay rates from tt-channel single-top-quark events to tightly constrain Wilson coefficients of effective field theory operators, finding results consistent with Standard Model predictions.

ATLAS Collaboration2026-08-13
⚛️ high-energy experiments

Inverse Autoregressive Flows for Zero Degree Calorimeter fast simulation

This paper presents a physics-based machine learning approach using Inverse Autoregressive Flows within a teacher-student framework, enhanced by a novel loss function and scaling mechanism, to achieve a 421-fold speedup in simulating the ALICE Zero Degree Calorimeter while accurately capturing particle shower morphology and mitigating rare artifacts.

Emilia Majerz, Witold Dzwinel, Jacek Kitowski2026-08-13
⚛️ high-energy experiments

Search for a new resonance decaying to a Higgs boson and a scalar boson in events with two b jets and two Z bosons in proton-proton collisions at s\sqrt{s} = 13 TeV

Using 138 fb−1^{-1} of proton-proton collision data at s\sqrt{s} = 13 TeV, this study searches for new resonances decaying into a Higgs boson and a scalar boson in the bbZZ final state, finding no significant deviations from the Standard Model and setting 95% confidence level upper limits on the production cross sections for both HY and HH scenarios.

CMS Collaboration2026-08-13
🔬 physics

Temperature-Dependent Performance of NaI(Tl) Crystal with Dual-Channel SiPM Readout for Low-Mass Dark Matter Searches

This paper reports the first temperature-dependent characterization of a NaI(Tl) crystal coupled to dual SiPMs, demonstrating a 34.5% increase in light yield at 238 K and effective thermal noise suppression via coincidence triggers, which collectively offer a promising pathway to lower energy thresholds for low-mass dark matter and coherent elastic neutrino-nucleus scattering searches.

W. K. Kim, H. Y. Lee, K. W. Kim, H. S. Lee2026-08-13
⚛️ high-energy experiments

Development and Initial Performance of an Upgraded NaI(Tl) Crystal Encapsulation for COSINE-100U

This paper reports the development and successful initial performance of an upgraded NaI(Tl) crystal encapsulation for the COSINE-100U experiment, which enhances light collection and reduces surface backgrounds by eliminating quartz windows and directly coupling PMTs to beveled crystals, thereby improving sensitivity to low-mass dark matter.

Doohyeok Lee, Jae Young Cho, Chang Hyon Ha, Eunju Jeon, Hongjoo Kim, Jinyoung Kim, Kyungwon Kim, SungHyun Kim, Sun Kee K (…)2026-08-13
⚛️ high-energy experiments

Toward a Measurement of the Higgs Boson Mass with Natural-Width Precision at FCC-ee

This paper demonstrates that the FCC-ee collider can achieve a Higgs boson mass measurement precision of 4 MeV using leptonic ZH recoil channels, a level of accuracy required to probe the electron Yukawa coupling via resonant production and prevent the mass from limiting future electroweak fits.

Jan Eysermans, Ang Li, Gregorio Bernardi, Christoph Paus, Emmanuel Perez, Michele Selvaggi2026-08-13
⚛️ high-energy experiments

Laboratory constraints on peV-scale mass splitting between ordinary and sterile neutron states

This paper presents the first laboratory constraints on neutron-to-mirror-neutron oscillations with a mass splitting between 0.3 and 22 peV, achieving exclusion limits on the oscillation time constant of approximately 20 seconds that surpass existing astrophysical bounds from neutron-star cooling.

N. J. Ayres (Institute for Particle Physics and Astrophysics, ETH Zürich, Switzerland), Z. Berezhiani (INFN, Laboratori (…)2026-08-13