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.

δCP\delta_{\rm CP}-free constraints on NSI parameters εeμ\varepsilon_{e\mu} and εeτ\varepsilon_{e\tau} using high-purity νμCC\nu_\mu\,{\rm CC} events at IceCube DeepCore

Using a high-purity sample of atmospheric νμ\nu_\mu charged-current events from 7.5 years of IceCube DeepCore data, this study establishes δCP\delta_{\rm CP}-free constraints on non-standard interaction parameters εeμ\varepsilon_{e\mu} and εeτ\varepsilon_{e\tau} that are consistent with the Standard Model and complementary to long-baseline experiments.

J Krishnamoorthi, Anil Kumar, Sanjib Kumar Agarwalla2026-04-20⚛️ hep-ex

Quantum Tomography and Entanglement in Semi-Leptonic hVVh\to VV^* Decays at Higher Orders

This paper presents a systematic study of semi-leptonic Higgs decays to electroweak gauge bosons at NLO QCD and electroweak accuracy, demonstrating that while finite fermion masses and higher-order corrections significantly modify angular observables, the process retains an effective two-qutrit description suitable for quantum tomography and entanglement analysis.

Dorival Gonçalves, Ajay Kaladharan, Alberto Navarro2026-04-20⚛️ hep-ex

Performance Evaluation of Straw Tubes with Muon Beams at CERN

This paper presents results from two CERN test beam campaigns using 150 GeV muon beams to evaluate the spatial resolution and detection efficiency of straw tube detectors, establishing benchmark performance metrics for their potential application in the FCC-ee straw tracker.

Linnuo Zhang (University of Michigan), Chihao Li (University of Michigan), Jiajin Ge (University of Michigan), Tatiana Azaryan (Tufts University), Vitalii Bautin (Joint Institute for Nuclear Research (…)2026-04-20⚛️ hep-ex

Radiation effects on the entanglement of fermion pairs at colliders

This paper demonstrates that energetic final-state radiation induces decoherence and significantly reduces the entanglement of fermion-antifermion pairs produced at colliders, with statistically significant experimental signals predicted for current datasets from ttˉ(g)t\bar{t}(g) production at the LHC and τ+τ(γ)\tau^{+}\tau^{-}(\gamma) production at Belle 2.

Rafael Aoude, José Manuel Camacho, Valentin Durupt, Guillermo García-Mir, Fabio Maltoni, María Moreno Llácer, Leonardo Satrioni, Marcel Vos2026-04-20⚛️ hep-ex

Measurement of the scintillation resolution in liquid xenon and its impact for future segmented calorimeters

This paper reports a new measurement of liquid xenon's scintillation energy resolution using high-performance silicon photomultipliers, achieving a value of 3.7% at 511 keV that aligns with theoretical expectations and supports the viability of modular liquid xenon detectors for future segmented calorimeters and Positron Emission Tomography.

C. Romo-Luque, N. Salor-Iguiñiz, J. M. Benlloch-Rodríguez, R. Esteve, V. Herrero-Bosch, R. J. Aliaga, V. Álvarez, F. Ballester, R. Gadea, A. Martínez, F. Monrabal, M. Querol, J. Rodríguez, J. Rodrígue (…)2026-04-17⚛️ hep-ex

Systematic study of flow of protons and light clusters in intermediate-energy heavy-ion collisions with momentum-dependent potentials

This study utilizes the PHQMD approach with a novel momentum-dependent potential to demonstrate that a soft, momentum-dependent nuclear equation of state best reproduces experimental flow data for protons and light clusters in intermediate-energy heavy-ion collisions, while also revealing distinct flow signatures that can help discriminate between different cluster formation mechanisms.

Viktar Kireyeu, Vadim Voronyuk, Michael Winn, Susanne Gläßel, Jörg Aichelin, Christoph Blume, Elena Bratkovskaya, Gabriele Coci, Jiaxing Zhao2026-04-17⚛️ nucl-ex

New physics searches via angular distributions of BˉD(Dπ)τ(ντνˉ)νˉτ \bar{B} \to D^* (\to D \pi) \tau (\to \ell \nu_\tau \bar{\nu}_\ell) \bar{\nu}_\tau decays

This paper proposes a method to probe new physics in BˉDτνˉτ\bar{B} \to D^* \tau \bar{\nu}_\tau decays by analyzing the angular distribution of the full cascade BˉD(Dπ)τ(ντνˉ)νˉτ\bar{B} \to D^* (\to D \pi) \tau (\to \ell \nu_\tau \bar{\nu}_\ell) \bar{\nu}_\tau, demonstrating through simulated data that this approach can constrain right-handed and tensor current couplings with approximately 5–6% precision while incorporating recent lattice QCD form factor correlations.

Bhubanjyoti Bhattacharya, Thomas E. Browder, Alakabha Datta, Tejhas Kapoor, Emi Kou, Lopamudra Mukherjee2026-04-17⚛️ hep-ex