⚛️ Category

hep-ex

2503 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.

⚛️ nuclear theory

"Inevitable'' nonstrange tetraquark states and ρρ\rho\rho interaction

Using the quark delocalization color screening model, this study demonstrates that strong attractive interactions between ρ\rho mesons favor the formation of bound molecular states, identifying the IJ=02IJ=02 configuration as the most promising candidate for an "inevitable" nonstrange tetraquark worthy of experimental search.

Yanyue Pan, Yuying Hao, Shirui Zhao, Hongxia Huang, Jialun Ping2026-10-27
⚛️ nuclear experiments

The Pion Parton Distribution Puzzle in the High x Region

This paper presents a new theoretical approach using spectral function representation and phenomenological Light-Front wave functions to calculate pion parton distribution functions, revealing that the valence region is dominated by a highly virtual quark-antiquark cluster with minimal residual mass, a configuration that successfully reproduces the observed (1−x)(1-x) behavior at the x→1x \to 1 limit and links the PDF's peak characteristics to its analytic behavior near unity.

Misak Sargsian2026-10-27
⚛️ high-energy experiments

Observation of the Tccˉ1(4430)−T_{c\bar{c}1}(4430)^- state in B0→D∗−D0K+B^0\to D^{*-}D^0K^+ decays

Using 9 fb−1^{-1} of LHCb proton-proton collision data, this study presents the first observation of the Tccˉ1(4430)−T_{c\bar{c}1}(4430)^- tetraquark state in the D∗−D0D^{*-}D^0 decay channel with a statistical significance exceeding 5σ5\sigma, confirming that existing Ds+D_s^+ resonances are insufficient to explain the B0→D∗−D0K+B^0 \to D^{*-}D^0K^+ data.

LHCb collaboration, R. Aaij, M. Abdelfatah, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. (…)2026-10-27
⚛️ high-energy experiments

First measurement of ψ(3686)→pˉK+Σ∗(1385)0+c.c.\psi(3686)\to\bar{p} K^{+} \Sigma^{*}(1385)^{0} + c.c. and ψ(3686)→pˉK∗(892)0Σ++c.c.\psi(3686)\to\bar{p} K^{*}(892)^{0} \Sigma^{+} + c.c.

Using a sample of 2712.4×1062712.4 \times 10^6 ψ(3686)\psi(3686) events collected by the BESIII detector, this study reports the first observation of the decays ψ(3686)→pˉK+Σ∗(1385)0+c.c.\psi(3686)\to\bar{p} K^{+} \Sigma^{*}(1385)^{0} + c.c. and ψ(3686)→pˉK∗(892)0Σ++c.c.\psi(3686)\to\bar{p} K^{*}(892)^{0} \Sigma^{+} + c.c. with measured branching fractions, while finding no significant evidence for hidden-strange pentaquark candidates Nx(1875)N_{x}(1875) and Nx(2100)N_{x}(2100) and setting corresponding upper limits.

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, C. S. Akondi, R. Aliberti, A. Amoroso, Q. An, Y. (…)2026-10-27
⚛️ nuclear experiments

Muon Tridents at FASER and NA64μ\mu: Motivation, Predictions, and Prospects for Precision Measurements

This paper presents improved theoretical predictions and prospects for the first precision measurement of muon trident scattering at TeV energies using data from the FASER and NA64μ\mu experiments, demonstrating their potential to probe the process's energy dependence with percent-level accuracy.

Reinaldo Francener, Victor P. Goncalves, Felix Kling, Gabriel Rabelo-Soares2026-10-27
⚛️ high-energy experiments

Search for the rare decay η′→3γ\eta^{\prime}\to 3\gamma

Using a sample of approximately 10 billion J/ψJ/\psi events collected by the BESIII detector, researchers searched for the rare decay η′→3γ\eta^{\prime}\to 3\gamma, found no significant signal, and established a new upper limit on its branching fraction of 2.25×10−52.25\times 10^{-5} at the 90% confidence level, improving upon previous limits by more than a factor of four.

M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, C. S. Akondi, R. Aliberti, A. Amoroso, L. P. An, Q. An, M. S. Anderson (…)2026-10-27
⚛️ nuclear experiments

Jet-like dihadron correlations in OO and Ne--Ne collisions at sNN=5.36\sqrt{s_{\rm NN}} = 5.36 TeV with ALICE

This paper presents the first dihadron correlation measurements in light-ion (OO and Ne--Ne) collisions at sNN=5.36\sqrt{s_{\rm NN}} = 5.36 TeV with ALICE, revealing multiplicity-dependent modifications and a suppression of away-side yields in OO collisions that are qualitatively consistent with jet-medium interactions, though the potential contributions of event-selection biases and cold-nuclear-matter effects remain an open question.

Neelkamal Mallick (on behalf of the ALICE Collaboration), Joonsuk Bae (on behalf of the ALICE Collaboration)2026-10-27
⚛️ high-energy experiments

Search for nonresonant production of strongly coupled dark matter 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, this study presents a search for nonresonant semivisible jets indicative of strongly coupled dark matter using both supervised and unsupervised machine learning techniques, finding no significant excess and setting exclusion limits on mediator masses up to 2.4 TeV.

CMS Collaboration2026-10-27