hep-ex papers | Gist.Science

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.

⚛️ lattice

Probing Glueball content of X(2370) through heavy quarkonium radiative decays and electron-positron annihilation

This paper investigates the glueball content of the $X(2370)$ resonance by analyzing light-cone distribution amplitudes and a tetra-mixing scheme to predict branching ratios for heavy quarkonium radiative decays and electroproduction cross sections, offering testable theoretical predictions for current BESIII and Belle-II experiments.

Ruilin Zhu, Qiang Zhao2026-08-25

⚛️ high-energy experiments

Imprints of nuclear shell structure in exclusive vector meson production

This paper demonstrates that exclusive vector meson production at small $x$ serves as a novel probe of nuclear shell structure, as self-consistent nuclear densities derived from the quark-meson coupling model significantly modify coherent diffractive patterns, particularly for intermediate-mass nuclei like calcium isotopes where $J/\psi$ production offers a clean signal free from saturation effects.

Arpita Mondal, Arjun Kumar, Debojit Sarkar2026-08-25

⚛️ high-energy experiments

A tunable photonic band gap resonator for axion dark matter searches

This paper presents the first tunable photonic band gap resonator for axion dark matter searches, demonstrating a proof-of-concept design that successfully confines the operating transverse magnetic mode while eliminating unwanted transverse electric modes to address mode crowding in existing haloscopes.

Samantha M. Lewis, Dillon T. Goulart, Mirelys Carcana Barbosa, Shriram Jois, Alexander F. Leder, Aarav M. Sindhwad, Isab (…)2026-08-24

⚛️ high-energy experiments

Search for a Higgs boson produced in association with a charm quark and decaying to a W boson pair in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Using 138 fb $^{-1}$ of 13 TeV proton-proton collision data collected by the CMS detector, this paper searches for Higgs bosons produced in association with a charm quark and decaying to a W boson pair, setting an observed 95% confidence level upper limit of $|\kappa_\mathrm{c}| < 211$ on the Higgs-charm Yukawa coupling strength modifier, which improves to $|\kappa_\mathrm{c}| < 47$ when combined with previous diphoton channel results.

CMS Collaboration2026-08-24

⚛️ phenomenology

First Search for Ultraheavy Dark Matter Using a Magnetically Levitated Particle

The POLONAISE experiment conducted the first search for ultraheavy dark matter using a magnetically levitated milligram-scale ferromagnet, setting leading constraints on dark matter-neutron interactions for masses between $10^6$ and $10^{15}\,\mathrm{GeV}/c^2$ and extending the reach of levitated sensing by seven orders of magnitude.

Dennis G. Uitenbroek, Dorian W. P. Amaral, Juehang Qin, Jurriaan Langendorff, Andrew Gingerich, Tjerk H. Oosterkamp, Chr (…)2026-08-24

⚛️ phenomenology

A window for the mixed same-sign signature in the type-II seesaw models

This paper demonstrates that electroweak loop corrections in type-II seesaw models fix the Higgs triplet mass splitting to a narrow range, which critically determines the branching ratio of the mixed same-sign decay channel $H^{\pm\pm} \to H^\pm W^{\pm(*)}$ and significantly shifts existing experimental exclusion boundaries depending on the quartic coupling $\lambda_4$ .

Cheng-Wei Chiang2026-08-24

⚛️ high-energy experiments

Evidence for $\eta_{c}(2S)\to p\bar{p}\pi^{+}\pi^{-}\pi^{0}$ and observation of $\chi_{cJ} \to p\bar{p}\pi^{+}\pi^{-}\pi^{0}$

Using a large sample of $\psi(3686)$ events collected by the BESIII detector, this study reports evidence for the decay $\eta_{c}(2S)\to p\bar{p}\pi^{+}\pi^{-}\pi^{0}$ and provides the first observation of $\chi_{cJ} \to p\bar{p}\pi^{+}\pi^{-}\pi^{0}$ decays with significantly improved precision measurements of their branching fractions and those of the intermediate $\chi_{cJ}\to p\bar{p}\omega$ processes.

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, C. S. Akondi, R. Aliberti, A. Amoroso, Q. An, Y. (…)2026-08-24

⚛️ phenomenology

The ABC of RPV III: Classification of R-parity Violating Signatures from LQD Couplings and their Coverage at the LHC

This paper presents a systematic study of R-parity violating $LQ\bar{D}$ operators in the MSSM, classifying their collider signatures and evaluating current LHC coverage to reveal substantial sensitivity in the colored sector while identifying significant gaps for wino- and higgsino-like LSPs with $\tau$ -involving couplings and for directly produced slepton LSPs.

Herbi K. Dreiner, Yong Sheng Koay, Tina Potter, Martin Schürmann, Rhitaja Sengupta, Apoorva Shah, Nadja Strobbe2026-08-24

⚛️ high-energy experiments

Angular analysis of the decay ${\it \Lambda}_{\it b}^{0} \to {\it \Lambda}(1520){\it \mu^{+}\mu^{-}}$

Using 9 fb $^{-1}$ of proton-proton collision data from the LHCb detector, this paper presents the first angular analysis of ${\it \Lambda}_{\it b}^{0} \to {\it \Lambda}(1520){\it \mu^{+}\mu^{-}}$ decays, measuring key angular observables that are found to be in good agreement with Standard Model predictions.

LHCb collaboration, R. Aaij, M. Abdelfatah, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. (…)2026-08-24

⚛️ high-energy experiments

Implications of two-channel rescattering for charm CP violation from precise dispersive data

This paper demonstrates that even with optimized inputs and precise dispersive data, the two-channel rescattering mechanism remains insufficient to explain the large CP violation observed in charm-meson decays within the Standard Model, while also providing new constraints on CP asymmetries through sum rules.

Antonio Pich, Eleftheria Solomonidi, Luiz Vale Silva2026-08-24

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hep-ex

Probing Glueball content of X(2370) through heavy quarkonium radiative decays and electron-positron annihilation

Imprints of nuclear shell structure in exclusive vector meson production

A tunable photonic band gap resonator for axion dark matter searches

Search for a Higgs boson produced in association with a charm quark and decaying to a W boson pair in proton-proton collisions at s\sqrt{s}s​ = 13 TeV

First Search for Ultraheavy Dark Matter Using a Magnetically Levitated Particle

A window for the mixed same-sign signature in the type-II seesaw models

Evidence for ηc(2S)→ppˉπ+π−π0\eta_{c}(2S)\to p\bar{p}\pi^{+}\pi^{-}\pi^{0}ηc​(2S)→ppˉ​π+π−π0 and observation of χcJ→ppˉπ+π−π0\chi_{cJ} \to p\bar{p}\pi^{+}\pi^{-}\pi^{0}χcJ​→ppˉ​π+π−π0

The ABC of RPV III: Classification of R-parity Violating Signatures from LQD Couplings and their Coverage at the LHC

Angular analysis of the decay Λb0→Λ(1520)μ+μ−{\it \Lambda}_{\it b}^{0} \to {\it \Lambda}(1520){\it \mu^{+}\mu^{-}}Λb0​→Λ(1520)μ+μ−

Implications of two-channel rescattering for charm CP violation from precise dispersive data

Search for a Higgs boson produced in association with a charm quark and decaying to a W boson pair in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Evidence for $\eta_{c}(2S)\to p\bar{p}\pi^{+}\pi^{-}\pi^{0}$ and observation of $\chi_{cJ} \to p\bar{p}\pi^{+}\pi^{-}\pi^{0}$

Angular analysis of the decay ${\it \Lambda}_{\it b}^{0} \to {\it \Lambda}(1520){\it \mu^{+}\mu^{-}}$