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.

The Case for Space-Based Particle Colliders: Orbital Infrastructure as a Path to Grand Unification Energy Scales

This paper argues that achieving the extreme energy scales necessary for Grand Unification requires transitioning from terrestrial to space-based particle colliders, leveraging orbital advantages like ultra-high vacuum, passive cooling, and gigawatt-scale power infrastructure to overcome the size and thermodynamic limitations of Earth-bound facilities.

Viktor Danchev, Alex Dyer, Sebastian Grau, Guillaume Vazeille2026-05-12🔬 physics.app-ph

Primordial Black Hole Hotspots Beyond Flat Spacetime

This paper formulates the diffusion equation for primordial black hole hotspots in an expanding universe, revealing that while cosmological expansion does not alter the robust formation or spatial temperature profile, it significantly accelerates the cooling process and ensures all hotspots eventually disappear within a finite time, contrary to flat-spacetime predictions.

Doojin Kim, TaeHun Kim, Jong-Chul Park, Jong-Hyun Yoon2026-05-12⚛️ hep-ph

Electroweak Restoration: SMEFT and HEFT

This paper investigates electroweak restoration in longitudinal di-boson production by comparing Standard Model Effective Field Theory (SMEFT) and Higgs Effective Field Theory (HEFT), demonstrating that specific amplitude ratios distinguish the two frameworks and proposing the WL±ZLW^\pm_L Z_L to WL±hW^\pm_L h cross-section ratio as a key observable for future HL-LHC sensitivity studies.

Ian M. Lewis, Zhen Liu, Ishmam Mahbub2026-05-12⚛️ hep-ph

Lepton Flavor Violating Higgs decays at the Compact Linear Collider

This paper investigates the sensitivity of the future Compact Linear Collider (CLIC) to lepton flavor violating Higgs decays (heμh\rightarrow e\mu, hτμh\rightarrow\tau\mu, and heτh\rightarrow e\tau), projecting that it could establish 95% confidence level upper limits on their branching fractions between 10410^{-4} and 10510^{-5} using integrated luminosities of 4 ab1^{-1} at 1.4 TeV and 5 ab1^{-1} at 3 TeV.

Francisca Garay, Gabriel Vega, Philipp Roloff2026-05-12⚛️ hep-ph

Higher-order local constraints from reciprocal symmetry and entanglement entropy of charged-particle multiplicity distributions in $pp$ collisions

This paper investigates the reciprocal symmetry of charged-particle multiplicity distributions in proton-proton collisions by deriving higher-order local constraints and an entanglement entropy formula, finding that while the symmetry holds approximately near the mean multiplicity, it breaks down globally at 13 TeV due to residual deviations exposed by high-precision data.

Mustapha Ouchen, Alex Prygarin, Claudelle Capasia Madjuogang Sandeu2026-05-12⚛️ hep-ph

Direct determination of the structure functions FLF_L, FSF_S and GG from F2F_2 and dF2/dQ2dF_2/dQ^2 to O(αs2)O(\alpha_s^2)

This paper extends previous work by deriving consistent O(αs2)O(\alpha_s^2) expressions for the longitudinal, singlet, and gluon structure functions (FLF_L, FSF_S, and GG) directly from the measured F2F_2 and its logarithmic derivative with respect to Q2Q^2, while treating small non-singlet corrections at low xx.

G. R. Boroun, Loyal Durand, Phuoc Ha2026-05-12⚛️ hep-ph

Optimizing Yukawa couplings to suppress Dimension-five Proton Decay in $SU(5)$ GUT

This paper employs machine learning optimization techniques, specifically the Adam optimizer, to navigate the complex 33-dimensional parameter space of a supersymmetric $SU(5)$ GUT extended with 45\mathbf{45} and 45\overline{\mathbf{45}} Higgs representations, successfully identifying Yukawa coupling configurations that suppress dimension-five proton decay to satisfy Super-Kamiokande's experimental bounds.

Naoyuki Haba, Junpei Ikemoto, Yasuhiro Shimizu, Toshifumi Yamada2026-05-12⚛️ hep-ph