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.

🔭 astrophysics

The KM3NeT event: a primordial high energy neutrino?

This paper proposes that the ultrahigh energy neutrino event detected by KM3NeT could originate from the decay or annihilation of long-lived primordial relics around the recombination era, a scenario that resolves tensions with null results from other experiments by producing a sharp spectral feature without an associated gamma-ray flux and potentially leaving a detectable imprint on the Cosmic Microwave Background.

Nicolas Grimbaum Yamamoto, Thomas Hambye2026-04-22
⚛️ phenomenology

A new approach to long-lived particle detection at hadron colliders: the DELIGHT-SHIELD\textsf{DELIGHT-SHIELD} concept

This paper proposes the DELIGHT-SHIELD\textsf{DELIGHT-SHIELD} concept, a novel detector design for the 100 TeV Future Circular Collider that replaces inner tracking with a multi-layered composite shield to suppress Standard Model backgrounds by up to seven orders of magnitude, thereby enabling unprecedented sensitivity to long-lived particles with branching ratios as low as O(10−9)\mathcal{O}(10^{-9}).

Biplob Bhattacherjee, Arnav Chauhan, Swagata Mukherjee, Rhitaja Sengupta, Anand Sharma2026-04-22
⚛️ lattice

Mass spectrum, magnetic moments and Regge trajectories of Ωccb\Omega_{ccb} and Ωcbb\Omega_{cbb} baryons in the nonrelativistic quark--diquark model

This paper employs a nonrelativistic quark-diquark model to predict the mass spectra, magnetic moments, and Regge trajectories of the triply heavy Ωccb\Omega_{ccb} and Ωcbb\Omega_{cbb} baryons, establishing a consistent link to experimental BcB_c meson data and providing reliable theoretical benchmarks for future searches at LHCb.

Öznur Çakır, Halil Mutuk2026-04-22
⚛️ phenomenology

Fine-Tuning Small Reasoning Models for Quantum Field Theory

This paper presents the first fine-tuning study of small 7B-parameter reasoning models for Quantum Field Theory, utilizing a novel data generation pipeline to create synthetic and human-adapted training data, and evaluates the effectiveness of Reinforcement Learning and Supervised Fine-Tuning in enhancing domain-specific reasoning while analyzing the evolution of reasoning errors.

Nathaniel S. Woodward, Zhiqi Gao, Yurii Kvasiuk, Kendrick M. Smith, Frederic Sala, Moritz Münchmeyer2026-04-22