hep-ph papers | Gist.Science

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.

⚛️ high-energy theory

Learning the S-matrix from data: Rediscovering gravity from gauge theory via symbolic regression

This paper demonstrates that symbolic regression applied to numerical on-shell data can autonomously rediscover fundamental analytic structures in scattering amplitudes, including KLT, Kleiss-Kuijf, and BCJ relations, thereby establishing a data-driven strategy for uncovering hidden theoretical connections like the gravity-gauge duality without relying on prior group-theoretic knowledge.

Nathan Moynihan2026-02-18

⚛️ phenomenology

Higher-twist effect in inclusive electron-positron annihilation

This paper establishes a comprehensive theoretical framework incorporating twist-4 higher-twist effects into electron-positron single-inclusive annihilation, demonstrating through a spectator model and comparison with BESIII data that these power corrections, alongside kinematic mass effects, are essential for accurately describing hadronization dynamics at low to intermediate energy scales.

Jing Zhao, Yongjie Deng, Tianbo Liu, Weihua Yang2026-02-18

⚛️ general relativity

Primordial black hole evaporation in a thermal bath and gravitational waves

This paper investigates how the thermal environment of the early Universe modifies the evaporation history of primordial black holes, thereby significantly altering the timing and spectral properties of the stochastic gravitational wave background they produce compared to standard vacuum evaporation models.

Arnab Chaudhuri, Kousik Loho2026-02-18

⚛️ general relativity

Cosmic topology. Part IIc. Detectability with non-standard primordial power spectrum

This study demonstrates that deviations from the standard primordial power spectrum can significantly enhance or suppress the detectability of non-trivial cosmic topologies in CMB temperature data, highlighting the critical need to account for primordial spectrum uncertainties in topology searches.

Joline Noltmann, Andrius Tamosiunas, Deyan P. Mihaylov, Yashar Akrami, Javier Carrón Duque, Thiago S. Pereira, Glenn D. (…)2026-02-18

⚛️ nuclear theory

Charm and strange meson fragmentation functions

This paper computes charm and strange meson fragmentation functions by deriving and solving a set of twenty-five coupled jet equations based on Poincaré covariant Bethe-Salpeter wave functions, thereby providing a consistent description of quark hadronization across both light and heavy sectors.

Roberto C. da Silveira, Ian C. Cloët, Bruno El-Bennich, Fernando E. Serna2026-02-18

⚛️ phenomenology

Tri-hypercharge: a separate gauged weak hypercharge for each fermion family as the origin of flavour

This paper proposes a "Tri-hypercharge" extension of the Standard Model where separate gauged weak hypercharges for each fermion family naturally explain flavor hierarchies, CKM mixing, and neutrino masses via a low-scale seesaw mechanism, while predicting TeV-scale $Z'$ bosons with observable implications for collider physics and flavor-violating processes.

Mario Fernández Navarro, Stephen F. King2026-02-17

⚛️ high-energy experiments

Minimal complete tri-hypercharge theories of flavour

This paper proposes and analyzes two minimal, ultraviolet-complete tri-hypercharge models that explain Standard Model fermion masses and mixings through three correlated physical scales, predicting that the lightest $Z'$ boson in these theories is discoverable via dilepton searches at LHC Run 3.

Mario Fernández Navarro, Stephen F. King, Avelino Vicente2026-02-17

⚛️ nuclear theory

Semi-Classical Spin Hydrodynamics in Flat and Curved Spacetime: Covariance, Linear Waves, and Bjorken Background

This paper establishes a covariant framework for semi-classical spin hydrodynamics in flat and curved spacetimes, demonstrating that spin and fluid modes decouple in the linear regime with damping governed solely by spin relaxation coefficients, while also highlighting the limitations of the Gibbs stability criterion due to equilibrium anisotropy and confirming similar relaxation dynamics in a conformal Bjorken flow background.

Annamaria Chiarini, Julia Sammet, Masoud Shokri2026-02-17

⚛️ nuclear experiments

Bayesian Inference of Hybrid Star Properties from Future High-Precision Measurements of Their Radii

This study demonstrates that future high-precision radius measurements of neutron stars will significantly constrain the hadron-quark phase transition density and related equation of state parameters through Bayesian analysis, yet will remain largely insensitive to the stiffness of quark matter regardless of measurement accuracy.

Bao-An Li, Xavier Grundler, Wen-Jie Xie, Nai-Bo Zhang2026-02-17

⚛️ phenomenology

Probing Spontaneous CP-Violation through Precision Higgs Observables

This paper investigates spontaneous CP-violation in the general two-Higgs-doublet model, demonstrating that its non-decoupling nature constrains Higgs masses below 500 GeV and predicts significant deviations in Higgs observables—such as branching ratios for $h \to \gamma\gamma$ and $h \to Z\gamma$ and the $hhh$ coupling—along with sizable flavor-violating decays for additional Higgs bosons.

Tanmoy Mondal, Kei Yagyu2026-02-17

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