⚛️ Category

hep-ex

2585 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

Expected Sensitivity of the Light Dark Matter eXperiment to Long-Lived Dark Photons and Axion-Like Particles

This paper presents a detailed simulation-based evaluation demonstrating that the Light Dark Matter eXperiment (LDMX) can achieve competitive sensitivity to long-lived, visibly decaying dark photons and axion-like particles, thereby complementing its primary search for invisible dark matter and significantly broadening its exploration of the sub-GeV dark sector.

Torsten Akesson, Clay Barton, Charles Bell, Elizabeth Berzin, Liam Brennan, Lene Kristian Bryngemark, Lincoln Curtis, Pa (…)2026-04-17
⚛️ high-energy experiments

Charmed baryon decays at BESIII

This paper summarizes recent BESIII results on charmed-baryon decays derived from the world's largest sample of Λc+Λˉc−\Lambda_c^+\bar{\Lambda}_c^- pairs, highlighting the observation of the rare semi-leptonic decay Λc+→ne+νe\Lambda_c^+\to ne^+\nu_e, the first measurement of the decay asymmetry in Λc+→Ξ0K+\Lambda_c^+\to\Xi^0K^+, and various branching fraction measurements and partial wave analyses.

Xudong Yu (on behalf of the BESIII Collaboration)2026-04-17
⚛️ high-energy experiments

Dalitz decay of K∗(892)→Kℓ+ℓ−K^*(892) \rightarrow K \ell^+\ell^-: A New Probe for Hadronic Structure and Dark Photon Searches

This paper presents the first comprehensive theoretical study of the rare Dalitz decay K∗(892)→Kℓ+ℓ−K^*(892) \rightarrow K \ell^+ \ell^-, predicting its branching fraction and dilepton spectrum to establish it as a new probe for hadronic structure and a sensitive channel for searching for light dark photons at the BESIII experiment.

Benhou Xiang, Wanling Chang, Shuangshi Fang, Jingqing Zhang2026-04-17
⚛️ high-energy experiments

Study of the B0→Λc+Λˉc−KS0B^0 \to \Lambda_c^+ \bar{\Lambda}_c^- K_S^0 decay

Using LHCb data at s=13\sqrt{s} = 13 TeV, this study presents the first observation of the B0→Λc+Λˉc−KS0B^0 \to \Lambda_c^+ \bar{\Lambda}_c^- K_S^0 decay, measuring its branching ratio relative to the charged mode and finding evidence for the isospin partners Ξc(2923)+\Xi_c(2923)^+ and Ξc(2939)+\Xi_c(2939)^+ in the Λc+KS0\Lambda_c^+ K_S^0 system.

LHCb collaboration, R. Aaij, M. Abdelfatah, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. (…)2026-04-17
⚛️ high-energy experiments

Rare and very rare decays at the LHCb experiment

This paper presents recent LHCb results on rare and very rare decays of third-generation particles, including first searches and the most stringent limits to date for processes such as b→sτ+τ−b \to s \tau^+\tau^-, b→sτ±e∓b \to s \tau^\pm e^\mp, b→sμ±e∓b \to s \mu^\pm e^\mp, and τ−→μ−μ+μ−\tau^- \to \mu^-\mu^+\mu^-, which serve as sensitive probes for physics beyond the Standard Model.

Hanae Tilquin (on behalf of the LHCb collaboration)2026-04-17
⚛️ nuclear experiments

Probing Cosmic Ray Composition and Muon-philic Dark Matter via Muon Tomography

This paper presents a 63-day cosmic-ray scattering experiment using Resistive Plate Chambers to simultaneously measure secondary cosmic-ray composition with high precision and establish stringent constraints on muon-philic dark matter scattering cross-sections.

Cheng-en Liu, Rongfeng Zhang, Zijian Wang, Andrew Michael Levin, Leyun Gao, Jinning Li, Minxiao Fan, Youpeng Wu, Zibo Qi (…)2026-04-16