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.

Covariant Construction of Generalized Form Factors

This paper presents a systematic, Lorentz-covariant technique using spinor Young tableaux to construct generalized form factor bases for hadronic matrix elements of scalar, vector, and tensor operators across arbitrary spins, notably providing the first general PP- and TT-conserved structures for spin-32\frac{3}{2} and spin-$2$ particles while correcting redundancies found in existing literature.

Hao Sun, Tuo Tan, Jiang-Hao Yu2026-04-29⚛️ hep-ph

Analysis of quarkonium polarization in proton-proton (p-p) collisions at LHC using PYTHIA model

This paper utilizes the PYTHIA8 Monte Carlo model to simulate and analyze the polarization of J/ψJ/\psi and Υ(1S)\Upsilon(1S) quarkonia in proton-proton collisions at 7 and 13 TeV, incorporating detector effects to compare theoretical predictions with recent ALICE experimental measurements.

Deekshit Kumar, Ekata Nandy, Biswarup Paul, Subikash Choudhury, Tinku Sinha, Partha Pratim Bhaduri2026-04-29⚛️ hep-ph

$CP$ violation in singly Cabibbo suppressed Dπa0(980)D\to \pi a_0(980) decays

This contribution suggests that significant long-range rescattering effects, particularly the process DKKa0πD\to K^*K\to a_0\pi, explain the large experimental branching ratios in singly Cabibbo-suppressed Dπa0(980)D\to \pi a_0(980) decays and naturally predict direct $CP$ asymmetries at the level of 10310^{-3}, thereby establishing these decays as a promising new approach for investigating $CP$ violation.

Yu-Kuo Hsiao, Shu-Ting Cai, Yan-Li Wang2026-04-29⚛️ hep-ex

Explainable AI for Jet Tagging: A Comparative Study of GNNExplainer, GNNShap, and GradCAM for Jet Tagging in the Lund Jet Plane

This contribution evaluates and compares perturbation-based, Shapley-value-based, and gradient-based interpretability methods adapted for the representation of the Lund-Jet-Plane and demonstrates that these techniques successfully correlate neural network predictions with classical QCD observables while revealing pronounced shifts in focus between perturbative and non-perturbative regimes in jet tagging.

Pahal D. Patel, Sanmay Ganguly2026-04-29⚛️ hep-ex