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.

Emergence of dynamical tensor fields in composite models of gravity

This work demonstrates that in composite gravity models in the infrared regime, dynamical tensor fields with finite kinetic terms emerge via the functional renormalization group flow, reproducing the transverse-traceless sector of the diffeomorphism-invariant Einstein-Hilbert action, while longitudinal and trace contributions remain uninterpreted as gauge-fixing artifacts.

Yadikaer Maitiniyazi, Masatoshi Yamada2026-04-29⚛️ gr-qc

JWST Constraints on Primordial Magnetic Fields

This paper demonstrates that constraints on the reionization history derived from JWST-calibrated UV luminosity functions, when combined with Planck CMB optical depth measurements, place stringent upper limits on the amplitude of primordial magnetic fields (B2<0.180.27\sqrt{\langle B^2 \rangle} < 0.18\text{--}0.27 nG) by ruling out the double reionization scenario they would otherwise induce.

Malcolm Fairbairn, María Olalla Olea-Romacho, Juan Urrutia, Ville Vaskonen2026-04-29⚛️ hep-ph

spectroxide: A code package for computing cosmic microwave background spectral distortions

This paper introduces *spectroxide*, an AI-assisted Rust and Python code package for computing cosmic microwave background spectral distortions, and presents it as a case study demonstrating the critical role of human domain expertise in identifying physics-specific errors that automated testing missed during AI-driven scientific software development.

Ethan Baker, Hongwan Liu, Siddharth Mishra-Sharma2026-04-29⚛️ hep-ph

Next-to-next-to-leading QCD corrections to the B+\mathbf{B^+}-Bd0\mathbf{B_d^0}, D+\mathbf{D^+}-D0\mathbf{D^0}, and Ds+\mathbf{D_s^+}-D0\mathbf{D^0} lifetime ratios

This paper presents next-to-next-to-leading QCD corrections to the lifetime ratios of B+B^+, D+D^+, Ds+D_s^+, and D0D^0 mesons, combining three-loop perturbative calculations with hadronic matrix elements to produce theoretical predictions that show good agreement with experimental data.

Francesco Moretti, Ulrich Nierste, Pascal Reeck, Matthias Steinhauser2026-04-29⚛️ hep-ph

The Angular Observables of ΛbΛc(Λ0π+)τ(πντ)νˉτ\Lambda_b \to \Lambda_c(\to \Lambda^0 \pi^+) \, \tau^-(\to \pi^- \nu_\tau)\, \bar{\nu}_\tau within the Paradigm of FCCC Anomalies

This contribution presents a global analysis of BB-meson flavor anomalies extended to the baryonic sector and demonstrates that the decay Λb0Λc+(Λ0π+)τ(πντ)νˉτ\Lambda_b^0 \to \Lambda_c^+(\to \Lambda^0 \pi^+) \tau^-(\to \pi^- \nu_\tau)\bar{\nu}_\tau provides a powerful, independent probe for New Physics, with the (CVL,CSR)(C_{V_L}, C_{S_R}) scenario identified as the most favored solution and specific angular observables serving as highly sensitive indicators for potential CP-violating or CP-conserving dynamics.

Muhammad Arslan, Ishtiaq Ahmed, Muhammad Jamil Aslam2026-04-29⚛️ hep-ph

Forward backward CP asymmetry in τKπντ\tau^- \to K \pi \nu_{\tau} in the Left-Right Inverse seesaw model

This paper investigates the Left-Right Inverse Seesaw model's ability to explain CP violation in τKπντ\tau^- \to K \pi \nu_{\tau} decays, finding that while it cannot account for the integrated CP asymmetry observed by BaBar, it predicts a distinctive and pronounced signal in the differential forward-backward CP asymmetry driven by a non-decoupling scalar operator.

David Delepine, Shaaban Khalil2026-04-29⚛️ hep-ph

NMSSMScanner: Efficient Scans in the NMSSM Parameter Space Proof of Concept

This paper introduces NMSSMScanner, a new tool designed to efficiently scan the complex parameter space of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) under all relevant constraints, demonstrating its utility by identifying configurations that maximize resonant Higgs boson pair production.

Rafael Boto, Thi Nhung Dao, Felix Egle, Karim Elyaouti, Martin Gabelmann, Margarete Mühlleitner, Johann Plotnikov2026-04-29⚛️ hep-ph