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

Cosmic strings and domain walls: the impact of CMB BB-mode data

This paper analyzes full Planck 2018 and BICEP/Keck 2018 CMB data to constrain stable cosmic string and domain wall networks, finding no statistically significant evidence for defects but observing a mild preference for non-zero cosmic string tension while significantly improving constraints and forecasting future sensitivities for upcoming experiments.

Luca Caloni, Ricardo Z. Ferreira, Lara Sousa, Clara Winckler2026-03-05
⚛️ phenomenology

The COSMIC WISPers White Paper: The physics case for Weakly Interacting Slim Particles

This white paper, produced by the EU-funded Cosmic WISPers network, reviews the theoretical motivations and ongoing searches for Weakly Interacting Slim Particles (WISPs) as dark matter candidates, while outlining a strategic roadmap to secure European leadership in this field through diverse and cost-effective experiments over the next decade.

Ariel Arza, Deniz Aybas, Shyam Balaji, Reuven Balkin, Kai Bartnick, Charles F. A. Baynham, Itay M. Bloch, Claudio Bonati (…)2026-03-05
⚛️ phenomenology

Observational constraints on Luciano-Saridakis entropic cosmology

This paper presents the first observational constraints on Luciano-Saridakis entropic cosmology using combined background data, demonstrating that the model provides a statistically robust fit to current observations and offers a viable extension to the standard Λ\LambdaCDM model with the potential to alleviate the Hubble tension.

Matías Leizerovich, Susana J. Landau, Giuseppe Gaetano Luciano, Andreas Papatriantafyllou, Emmanuel N. Saridakis2026-03-05
⚛️ phenomenology

Flavor in Ninths and a Discrete Gauge Origin of the QCD Axion

This paper proposes a unified framework where a "flavor in ninths" structure arises from a discrete Z18\mathbb{Z}_{18} gauge symmetry that simultaneously explains quark and lepton hierarchies, stabilizes the QCD axion with NDW=1N_{\rm DW}=1 and a specific E/NE/N ratio, and naturally solves the axion quality problem via high-dimensional operators, predicting a dark matter axion within the reach of near-term experiments.

Vernon Barger2026-03-05