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.

⚛️ phenomenology

Ultra-Strongly Self-Interacting Dark Matter: From Phenomenology to Astrophysical Observables

This paper proposes a testable two-component self-interacting dark matter framework where a dominant species resolves small-scale structure issues while a tiny ultra-strongly interacting subcomponent seeds early halo collapse for high-redshift quasars, all consistent with current astrophysical observations and Lyman-α\alpha constraints.

M. Grant Roberts, Wolfgang Altmannshofer, Pierce Giffin, Stefano Profumo2026-08-25
⚛️ high-energy experiments

Heavy Neutral Lepton at Same-Sign Muon Collider

This paper investigates the discovery potential of heavy neutral leptons at the proposed μ\muTRISTAN same-sign muon collider, demonstrating that its high-energy lepton-number-violating and lepton-flavor-violating signatures could significantly surpass current electroweak precision bounds on HNL mixing, particularly for masses in the 5–10 TeV range.

Ryuichiro Kitano, Ian Low, Ryutaro Matsudo, Shohei Okawa, Subhojit Roy2026-08-25
⚛️ nuclear experiments

Radiative corrections to inverse beta decay: a precision analysis for reactor neutrinos

This paper presents a complete, high-precision calculation of radiative corrections to the inverse beta decay reaction using heavy-baryon chiral perturbation theory, incorporating quantum electrodynamics, chromodynamics, and electroweak contributions to provide updated cross-section predictions essential for reactor neutrino flux normalization, oscillation parameter determination, and new physics searches.

Oleksandr Tomalak2026-08-25
⚛️ high-energy experiments

UV cut-off of the Standard Model and proton decays

This paper proposes a theoretical framework where a fundamental scale Λ≳1011\Lambda \gtrsim 10^{11} GeV, potentially arising from composite Higgs models, explains small neutrino masses and accidental baryon/lepton number symmetries while predicting a proton lifetime consistent with a potential Super-Kamiokande observation of p→π0μ+p \to \pi^0 \mu^+ decay, which Hyper-Kamiokande is expected to confirm.

Ryuichiro Kitano, Shohei Okawa2026-08-25
⚛️ high-energy experiments

Probing direct CPCP violation in Λb0→Pc+h−Λ_b^0 \to P_c^+ h^- (h=π,K)(h=π,K) with final-state rescattering

Inspired by recent LHCb measurements, this paper utilizes the final-state rescattering framework to predict that the decays Λb0→Pc+π−\Lambda_b^0 \to P_c^+ \pi^- exhibit branching fractions around 10−610^{-6} with direct CP asymmetries near 1%, whereas the Λb0→Pc+K−\Lambda_b^0 \to P_c^+ K^- channel shows negligible CP violation and branching ratios highly sensitive to the spin assignments of the PcP_c states.

Zhu-Ding Duan, Tian-Liang Feng, Run-Hui Li, Ming-Zhu Liu, Jian-Peng Wang, Fu-Sheng Yu2026-08-25
🔬 atomic physics

Breit corrections to moderately charged ions in all-orders calculations

This study incorporates the Breit interaction into all-orders correlation potential calculations for Cs and Fr isoelectronic sequences, revealing that while these corrections significantly improve fine-structure intervals and highlight large effects in f-states, they do not fully resolve existing discrepancies between theoretical energy levels and experimental data.

Andoni Skoufris, Benjamin M. Roberts2026-08-25