Hep-Ph explores the fundamental forces that govern how particles interact and behave at the smallest scales imaginable. This field bridges the gap between theoretical predictions and experimental reality, helping scientists understand the building blocks of our universe without getting lost in complex mathematics. Whether investigating the Higgs boson or searching for new physics beyond current models, these studies push the boundaries of human knowledge about matter and energy.

At Gist.Science, we process every new preprint in this category as soon as it appears on arXiv. We strip away the dense jargon to offer both accessible plain-language explanations and detailed technical summaries, ensuring that groundbreaking research is understandable to everyone from students to seasoned experts. Below are the latest papers in this dynamic field, ready for you to explore with clarity and depth.

⚛️ nuclear experiments

Isospin-symmetry violation -- kaons and beyond (ISO-BREAK 25: summary and outlook)

This paper summarizes the ISO-BREAK 25 workshop held in Kielce in October 2025, which reviewed the current status of isospin-symmetry breaking observed by NA61/SHINE in nucleus-nucleus collisions, discussed its confirmation by other experiments, and outlined future experimental and theoretical priorities to explain this phenomenon.

Marek Gazdzicki (Jan Kochanowski University, Kielce, Poland), Francesco Giacosa (Jan Kochanowski University, Kielce, Pol (…)2026-04-20
⚛️ phenomenology

Constraining the Pulsar Beaming Fraction with TeV-Selected Galactic Pulsar Wind Nebulae and unidentified TeV Sources

This study estimates pulsar beaming fractions across radio, X-ray, and gamma-ray bands using TeV-selected pulsar wind nebulae and unidentified sources, revealing survey-dependent variations likely caused by selection effects and pulsar age differences, which can be reconciled within a unified framework employing a time-dependent opening angle.

Takumi Shimasue, Shota Kisaka, Aya Bamba, Shinpei Shibata2026-04-20
⚛️ high-energy experiments

Quantum Tomography and Entanglement in Semi-Leptonic h→VV∗h\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
⚛️ phenomenology

Tensor decomposition of e+e−→π+π−γe^+e^-\to\pi^+\pi^-\gamma to higher orders in the dimensional regulator

This paper presents the first beyond-next-to-leading-order study of the e+e−→π+π−γe^+e^-\to\pi^+\pi^-\gamma process by developing a complete four-dimensional tensor decomposition, evaluating one-loop polarized amplitudes analytically to higher orders in the dimensional regulator, and establishing an efficient numerical framework for five-point Feynman integrals to enable future NNLO predictions for radiative return processes.

Thomas Dave, Jérémy Paltrinieri, Pau Petit Rosàs, William J. Torres Bobadilla2026-04-20
⚛️ high-energy experiments

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 S (…)2026-04-20
⚛️ nuclear experiments

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, Gabrie (…)2026-04-17
⚛️ high-energy experiments

New physics searches via angular distributions of Bˉ→D∗(→Dπ)τ(→ℓντνˉℓ)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 Bˉ→D∗τνˉτ\bar{B} \to D^* \tau \bar{\nu}_\tau decays by analyzing the angular distribution of the full cascade Bˉ→D∗(→Dπ)τ(→ℓντνˉℓ)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
⚛️ high-energy theory

Effects of tau-neutrino detection on non-standard interactions at DUNE with a short discussion on the nature of neutrino mixing

This paper demonstrates that detecting tau neutrinos at the DUNE far detector significantly enhances sensitivity to Non-Standard Interactions, particularly the ϵμτ\epsilon_{\mu\tau} parameter, while also improving constraints on mass hierarchy, CP violation, mixing octants, and the unitarity of the PMNS matrix.

Xin Yue Yu, Zishen Guan, William Dallaway, Ushak Rahaman, Nikolina Ilic2026-04-17