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.

Dark graviton sensing with magnetically levitated superconductors

This paper proposes using magnetically levitated superconductors to detect ultra-light dark gravitons in the dHz to kHz range, finding that while their sensitivity to matter couplings is limited compared to existing experiments, they could serve as highly sensitive laboratory probes for dark-graviton couplings to electromagnetism.

Valentina Danieli, Paola C. M. Delgado, Federico R. Urban2026-03-25⚛️ hep-ex

Search for the radiative decays $D^0\to \gamma \bar K_1(1270)^0$ and $D^+\to \gamma K_1(1270)^+$

Using 20.3 fb⁻¹ of data collected by the BESIII detector, a search for the radiative decays $D^0\to \gamma \bar K_1(1270)^0$ and $D^+\to \gamma K_1(1270)^+$ yielded no significant signals, resulting in the first experimental upper limits on their branching fractions and providing the first test of the Vector Meson Dominance mechanism in these charmed meson decays.

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, R. Aliberti, A. Amoroso, Q. An, Y. Bai, O. Bakina, Y. Ban, H. -R. Bao, V. Batozskaya, K. Begzsuren, N. Berger, M. Berlowski, M. (…)2026-03-25⚛️ hep-ex

A search for heavy axion-like particles in light-by-light scattering at the FCC-hh

This paper investigates the potential of the future 100 TeV FCC-hh collider to discover or exclude heavy axion-like particles (ALPs) via light-by-light scattering in pp, pPb, and PbPb collisions, demonstrating that the facility offers significant sensitivity to ALP masses up to the TeV scale compared to current LHC bounds.

S. C. Inan, A. V. Kisselev2026-03-25⚛️ hep-ex

Amplitude Analysis of the Isospin-Violating Decay $J/\psi\rightarrow\gamma\eta\pi^{0}$

Using a large sample of $J/\psi$ events collected by the BESIII detector, this study presents the first amplitude analysis of the isospin-violating decay $J/\psi\to\gamma\eta\pi^0$ , identifying dominant intermediate processes and achieving the first observation of radiative transitions to isospin-triplet scalar mesons $a_0(980)^0$ , $a_2(1320)^0$ , and $a_2(1700)^0$ with a significantly improved measurement of the total branching fraction.

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, C. S. Akondi, R. Aliberti, A. Amoroso, Q. An, Y. H. An, Y. Bai, O. Bakina, H. -R. Bao, X. L. Bao, M. Barbagiovanni, V. Batozskay (…)2026-03-25⚛️ hep-ex

KATRIN Sensitivity to keV Sterile Neutrinos with the TRISTAN Detector Upgrade

This paper presents projected sensitivity estimates showing that the KATRIN experiment, utilizing its upcoming TRISTAN detector upgrade, will be capable of probing keV-scale sterile neutrino mixing amplitudes down to $|U_{e4}|^2 \sim 10^{-6}$ for masses between 4 and 13 keV, significantly extending the reach of previous laboratory searches despite potential systematic uncertainties.

H. Acharya, M. Aker, D. Batzler, A. Beglarian, J. Beisenkötter, M. Biassoni, B. Bieringer, Y. Biondi, B. Bornschein, L. Bornschein, M. Carminati, A. Chatrabhuti, S. Chilingaryan, B. A. Daniel, M. Desc (…)2026-03-25⚛️ nucl-ex

Resonant Parameters of Vector Charmonium-like States above 4.4 GeV

This paper presents a simultaneous fit to BESIII cross-section data for various charmonium-like final states above 4.4 GeV, determining the resonant parameters of four structures ( $\psi(4230)$ , $\psi(4500)$ , $\psi(4660)$ , and $\psi(4710)$ ) and finding that the $\psi(4660)$ and $\psi(4710)$ dominantly drive the production of $D_s^{+}D_{s1}^{*-}(2536)$ , $D_s^{+}D_{s2}^{*-}(2573)$ , and $\phi\chi_{c1,2}$ channels.

Chunhua Li, Wanting Liu, Linfa Tang, Ying Ding2026-03-25⚛️ hep-ex

Search for new particles decaying into top quark-antiquark pairs in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Using 138 fb $^{-1}$ of proton-proton collision data at 13 TeV collected by the CMS detector, this study performs a comprehensive search for new particles decaying into top quark-antiquark pairs across all lepton final states, setting the most stringent limits to date on heavy Z' bosons, Kaluza-Klein gluons, dark-matter mediators, and two-Higgs-doublet model scalars.

CMS Collaboration2026-03-25⚛️ hep-ex

Search for QCD axion dark matter with transmon qubits and quantum circuit

This paper proposes a direct search for QCD axion dark matter using superconducting transmon qubits as quantum sensors, demonstrating that combining cavity resonance with entangled quantum circuits can enhance the detection signal to reach the parameter regions predicted by QCD axion models.

Shion Chen, Hajime Fukuda, Toshiaki Inada, Takeo Moroi, Tatsumi Nitta, Thanaporn Sichanugrist2026-03-24⚛️ hep-ex

Entanglement-enhanced AC magnetometry in the presence of Markovian noises

This paper demonstrates that, contrary to the limitations observed in DC magnetometry, entangled GHZ states can enhance the sensitivity of AC magnetometry under parallel Markovian decoherence by scaling the interaction time as $1/L$ to mitigate noise effects and improve the detectable frequency bandwidth.

Thanaporn Sichanugrist, Hajime Fukuda, Takeo Moroi, Kazunori Nakayama, So Chigusa, Norikazu Mizuochi, Masashi Hazumi, Yuichiro Matsuzaki2026-03-24⚛️ hep-ex

Charmed $\Lambda_c^+$ baryon decays into light scalar mesons in the topological $SU(3)_f$ framework

Using the topological-diagram approach within the $SU(3)_f$ framework, this paper investigates two-body $\Lambda_c^+$ decays into light scalar mesons and demonstrates that interpreting these mesons as tetraquark states provides a consistent explanation for experimental data, including the unexpectedly large branching fraction of $\Lambda_c^+ \to \Lambda a_0^+$ , while predicting new decay rates that are accessible to current and future experiments.

Y. L. Wang, Y. K. Hsiao2026-03-24⚛️ hep-ex

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