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.

🔬 atomic physics

Probing keV mass QCD axions with the SACLA X-ray free electron laser

This paper extends previous bounds on the axion-photon coupling by over an order of magnitude using the SACLA X-ray free electron laser and the Borrmann effect in Laue crystals, achieving the most stringent laboratory constraints to date for QCD axions in the 3.46–3.48 keV mass range.

Charles Heaton, Jack W. D. Halliday, Taito Osaka, Ichiro Inoue, Sifei Zhang, Ahmed Alsulami, Joshua T. Y. Chu, Mila Fitz (…)2026-03-18
🔭 astrophysics

Exploring memory-burdened primordial black holes with ultra-high-energy cosmic-rays

This paper proposes that ultra-high-energy cosmic rays serve as a novel probe for memory-burdened primordial black holes, which could survive as dark matter by suppressing Hawking evaporation, and derives new constraints on their abundance by comparing theoretical proton and neutron emission models with observational data from the Pierre Auger Observatory.

Antonio Ambrosone, Marco Chianese, Carmelo Evoli2026-03-18
⚛️ nuclear theory

Polarization-dependent mass modifications of ϕ\phi meson with finite momentum in nuclear matter

This paper investigates the in-medium properties of the ϕ\phi meson with finite momentum in nuclear matter, revealing that while transverse polarization mass shifts remain momentum-independent, longitudinal shifts decrease quadratically with momentum due to specific vector mean-field and derivative interactions, offering new predictions for upcoming experiments at J-PARC.

Ahmad Jafar Arifi, Philipp Gubler, Kazuo Tsushima2026-03-18
⚛️ phenomenology

Probing the equivalence of chiral LCSRs in DπeνeD \to \pi e \nu_e decays and extraction of Vcd|V_{cd}|

This paper employs light-cone sum rules with both right-handed and left-handed chiral currents to calculate DπD \to \pi transition form factors, yielding branching fractions and CKM matrix element Vcd|V_{cd}| values that show good agreement with existing literature.

Xiu-Fen Wang, Hai-Jiang Tian, Yin-Long Yang, Long Zeng, Hai-Bing Fu2026-03-18