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.

⚛️ high-energy experiments

Lessons from LHCb and Belle II measurements of BJ/ψπB\to J/ψπ and BJ/ψKB\to J/ψK decays

This paper utilizes recent LHCb and Belle II measurements of CP asymmetries in BJ/ψπB\to J/\psi\pi decays, combined with flavor-SU(3) relations and first-order breaking corrections, to generate new Standard Model predictions for CP violation and decay rates in related BJ/ψKB\to J/\psi K and BsB_s processes.

Zoltan Ligeti, Yosef Nir, Roy Schein2026-01-26
⚛️ phenomenology

Electron-muon conversion in nuclei and rare decays induced by LFV dark photon

This paper investigates lepton-flavor violation in electron-muon nuclear conversion and rare radiative meson decays induced by a sub-GeV dark photon, providing estimates for current and future fixed-target experiments and applying these findings to analyze the specific decay channels η(η)γμe\eta(\eta') \to \gamma\mu e.

Alexey S. Zhevlakov, Sergey Kuleshov, Valery E. Lyubovitskij, Evgenie O. Oleynik2026-01-26
⚛️ phenomenology

Cosmological Constraints on Neutrino Masses in a Second-Order CPL Dark Energy Model

This study analyzes cosmological constraints on the sum of neutrino masses across Λ\LambdaCDM, CPL, and a second-order EXP dark energy models using various datasets and hierarchies, finding that the CPL parameterization yields tighter bounds than EXP, frequentist limits are stricter than Bayesian ones, and no statistically significant evidence for nonzero neutrino mass consistent with oscillation lower limits is detected.

Shubham Barua, Shantanu Desai2026-01-26
⚛️ phenomenology

Transverse-momentum resummation at mixed QCD\otimesQED NNLL accuracy for Z boson production at hadron colliders

This paper presents a calculation of the transverse momentum distribution for neutral charged bosons at hadron colliders, performing resummation of simultaneous QCD and QED initial-state radiation effects up to mixed NNLL accuracy and demonstrating that these mixed contributions induce percent-level corrections to pure QCD predictions.

Andrea Autieri, Stefano Camarda, Leandro Cieri, Giancarlo Ferrera, German Sborlini2026-01-26
⚛️ high-energy experiments

UV cut-off of the Standard Model and proton decays

This paper proposes a composite Higgs scenario with partial fermion compositeness at a scale of approximately 101110^{11} GeV, which naturally explains small neutrino masses and predicts a proton lifetime consistent with a potential pπ0μ+p \to \pi^0 \mu^+ decay signal observed at Super-Kamiokande, suggesting that Hyper-Kamiokande will soon detect numerous such events.

Ryuichiro Kitano, Shohei Okawa2026-01-26
⚛️ phenomenology

Flavour-Changing Neutral Current Top Decays in the Three Higgs Doublet Model

This paper investigates flavour-changing neutral current top quark decays within a Z3Z_3-symmetric democratic Three Higgs Doublet Model, demonstrating that one-loop contributions from an extended scalar sector can produce branching ratios significantly exceeding Standard Model predictions while remaining consistent with current constraints and potentially detectable at the High-Luminosity LHL.

Baradhwaj Coleppa, Benjamin Fuks, Akshat Khanna2026-01-26