⚛️ Category

hep-ex

2131 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

CP violation in K→μ+μ−K\toμ^+μ^- with and without time dependence through a tagged analysis

This paper proposes a method to extract short-distance information and resolve discrete ambiguities in the Standard Model prediction for KL0→μ+μ−K^0_L \to \mu^+\mu^- by analyzing time-integrated and time-dependent CP asymmetries, demonstrating that an LHCb-like experiment could constrain the relevant short-distance amplitude to within 35% of its Standard Model value and resolve the ambiguity at over 3σ\sigma significance.

Giancarlo D'Ambrosio, Avital Dery, Yuval Grossman, Teppei Kitahara, Radoslav Marchevski, Diego Martínez Santos, Stefan S (…)2026-05-20
⚛️ high-energy experiments

Amplitude analysis of B0→ηc(1S)K+π−B^0 \rightarrow η_c(1S) K^+ π^- decays

Using LHCb data, this paper performs an amplitude analysis of B0→ηc(1S)K+π−B^0 \rightarrow \eta_c(1S) K^+ \pi^- decays to measure their branching fraction and finds no evidence for the previously reported exotic resonance in the ηc(1S)π−\eta_c(1S) \pi^- system, with the data being well-described by known K0∗K^{0*} resonances.

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. Adefisoye, B. A (…)2026-05-20
⚛️ phenomenology

The Muonic Portal to Vector Dark Matter:connecting precision muon physics, cosmology, and colliders

This paper presents a comprehensive study of the Muonic Portal to Vector Dark Matter model, demonstrating its ability to simultaneously explain dark matter relic abundance and muon (g−2)μ(g-2)_\mu anomalies through a novel velocity-suppression mechanism while establishing stringent collider bounds on vector-like muon masses and predicting distinctive multi-lepton signatures for future searches.

Alexander Belyaev, Luca Panizzi, Nakorn Thongyoi, Franz Wilhelm2026-05-20
⚛️ phenomenology

Prospects for discovering strongly decaying doubly heavy TbcT_{bc} tetraquark states at LHCb

This paper evaluates the discovery potential of the JP=0+J^P=0^+ TbcT_{bc} tetraquark decaying into B−D+B^- D^+ at LHCb, finding that a 5σ5\sigma observation is feasible during Run 4 for optimistic production cross sections but would require the full Run 5 dataset for more realistic estimates, while remaining unobservable under conservative scenarios.

Mingjie Feng, Yiming Li, Hua-Sheng Shao2026-05-20
🔬 physics

Enhanced Ionization Charge Identification in the Short-Baseline Neutrino Program Neutrino Detectors with Deep Neural Networks

This paper introduces a deep neural network-based region of interest detection method (DNN ROI) for the Short-Baseline Neutrino Program's liquid argon time projection chambers, which outperforms traditional thresholding algorithms in identifying ionization charge and reconstructing neutrino interactions while demonstrating greater robustness against detector variations.

P. Abratenko (ICARUS Collaboration, SBND Collaboration), N. Abrego-Martinez (ICARUS Collaboration, SBND Collaboration) (…)2026-05-20
⚛️ high-energy experiments

Search for Higgs boson decays into two neutral scalars with unequal masses in final states with b quarks and tau leptons 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 collected by the CMS detector, a search for Higgs boson decays into two neutral scalars of unequal masses in final states containing b quarks and tau leptors found no significant excess over the Standard Model, resulting in the setting of 95% confidence level upper limits on the relevant production cross sections and branching fractions.

CMS Collaboration2026-05-20
⚛️ high-energy experiments

Hypothesis Tests for Observing Quantum Entanglement in HWW at the LHC

This paper proposes a novel strategy for detecting quantum entanglement in Higgs boson decays to WW boson pairs at the LHC by combining a continuous CGLMP inequality formulation with conditional denoising diffusion probabilistic models for neutrino reconstruction, projecting that robust 5σ\sigma evidence will be achievable with the high-luminosity dataset expected at the HL-LHC.

Vincent Alexander Croft, Lennart Voelz, Andrii Vak, Andre Sopczak, Carsten Burgard2026-05-20
⚛️ phenomenology

Probing the Rare Four-Bottom Higgs Decay H→bbˉbbˉH\to b\bar b b\bar b at the HL-LHC and ILC

This paper proposes the rare Standard Model Higgs decay H→bbˉbbˉH\to b\bar b b\bar b as a probe of Higgs interactions, calculating its branching ratio of approximately 1.6×10−31.6\times10^{-3} and demonstrating that it can be observed with high significance at both the High-Luminosity LHC and the ILC using multivariate analysis techniques.

Alexander Belyaev, Eduard Boos, Vyacheslav Bunichev, Guliya Nurbakova, Saniya Rustembayeva2026-05-20