⚛️ Category

hep-ph

5500 papers

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.

⚛️ nuclear experiments

The size of the quark-gluon plasma in ultracentral collisions: impact of initial density fluctuations on the average transverse momentum

This paper analytically demonstrates that the variation of the quark-gluon plasma volume in ultracentral collisions depends on initial density fluctuations and is negligible when total entropy scales with the mass number, thereby establishing that measurements of average transverse momentum can probe detailed nuclear structure and pre-equilibrium dynamics.

Fabian Zhou, Giuliano Giacalone, Jean-Yves Ollitrault2026-04-21
⚛️ phenomenology

Systematic study of exotic 1−+1^{-+} tetraquark spectroscopy

This paper employs a constituent quark model with a Cornell-like potential to predict the masses and decay characteristics of exotic 1−+1^{-+} compact tetraquarks across light, charmonium-like, and fully-charm sectors, concluding that the observed η1(1855)\eta_1(1855) state is unlikely to be a compact tetraquark.

Kai Xu, Zheng Zhao, Nattapat Tagsinsit, Attaphon Kaewsnod, Ayut Limphirat, Christoph Herold, Yupeng Yan2026-04-21
⚛️ phenomenology

Creation of spin-3/2 dark matter via cosmological gravitational particle production

This paper investigates the cosmological gravitational production of stable spin-3/2 particles, termed "raritrons," demonstrating that their ability to constitute dark matter depends critically on the mass hierarchy relative to the inflationary Hubble scale, which governs the sound speed of the longitudinal mode and can lead to significant enhancements in particle production, particularly for lighter masses or time-dependent mass scenarios.

Edward W. Kolb, Andrew J. Long, Evan McDonough, Jingyuan Wang2026-04-21
⚛️ high-energy experiments

NO LESS: Novel Opportunities for Light Exotic Searches at the SPS

This paper demonstrates that a minimally reconfigured version of CERN's existing NA62 experiment, operating in a future ECN3 beam-dump facility with an optimized geometric setup, can achieve highly competitive sensitivity for detecting feebly interacting particles in the MeV to GeV mass range immediately upon beam availability.

Babette Döbrich, Jan Jerhot, Karim Massri, Jonathan L. Schubert, Tommaso Spadaro2026-04-21
⚛️ phenomenology

The effect of the two-loop SMEFT RGEs at future colliders

This paper presents a comprehensive analysis of the impact of newly computed two-loop SMEFT Renormalisation Group Equations on future collider phenomenology, demonstrating through both bottom-up global fits and top-down model matching that these higher-order corrections induce non-negligible effects, particularly for specific operators and model couplings, thereby altering sensitivity predictions for the HL-LHC and FCC-ee.

Luca Mantani, Pablo Olgoso, Alejo N. Rossia2026-04-21
⚛️ high-energy experiments

DMRadio-Core: A new approach for GUT-scale axion searches

The paper proposes DMRadio-Core, a novel experimental design utilizing a segmented solenoid and external LC resonators to significantly reduce the required magnetic energy while maintaining sensitivity, thereby enabling a near-term search for GUT-scale QCD axions in the 30–200 MHz range with a scalable path to lower frequencies.

V. Ankel, C. Bartram, J. Begin, C. Bell, S. Chaudhuri, H. -M. Cho, J. Corbin, W. Craddock, S. Cuadra, A. Droster, J. Ech (…)2026-04-21
⚛️ phenomenology

Four-loop QCD mixing of current-current operators

This paper presents the first fully analytic calculation of the four-loop (NNNLO) anomalous dimensions for ∣ΔS∣=1|\Delta S|=1 current-current operators in QCD, providing a crucial step toward a complete four-loop determination of indirect CP violation in the neutral kaon system (ϵK\epsilon_K) and offering results adaptable to various operator bases including the standard one used in BB physics.

Joachim Brod, Emmanuel Stamou, Tom Steudtner2026-04-21