⚛️ Category

hep-ph

5243 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.

⚛️ phenomenology

A possible interpretation of the LUX-ZEPLIN recoil event in the 2HD+a scenario

This paper proposes that the recent high-energy nuclear recoil event observed by the LUX-ZEPLIN experiment could be interpreted as a signal of fermionic dark matter within a 2HDM+a model featuring a light pseudoscalar boson, demonstrating that specific parameter regions of this scenario can simultaneously explain the event, satisfy cosmological density requirements, and evade existing constraints from direct detection, colliders, and precision measurements.

Giorgio Arcadi, Mattia di Mauro, Abdelhak Djouadi, Farinaldo Queiroz2026-09-16
⚛️ nuclear experiments

The Interplay Between Electromagnetic Fields and Baryon Stopping in a Hydrodynamic Model for Charged Flow

This paper presents a semi-analytic hydrodynamic model demonstrating that the observed centrality-dependent sign change in charge-dependent directed flow splitting in relativistic heavy-ion collisions arises from the competition between positive contributions from baryon stopping and negative contributions from spectator-induced electromagnetic fields.

Tuna Demircik, Dmitri E. Kharzeev, Krishna Rajagopal, Raimond Snellings2026-09-16
⚛️ phenomenology

Caught by its own light: Wimpzillas, the LHAASO knee and the diffuse γ\gamma-ray sky

While a decaying superheavy dark matter particle with a mass of 5⋅1075 \cdot 10^7 GeV can successfully reproduce the LHAASO-observed features of the proton spectrum across the knee, this interpretation is strongly ruled out because the associated cascade photons would vastly exceed the observed limits on the diffuse Galactic γ\gamma-ray emission.

D. Akl, A. J. Iovino, D. Kantzas, A. V. Macciò2026-09-16
⚛️ nuclear theory

Imprints of the nuclear liquid-gas phase transition on net-baryon number fluctuations

Using the parity-doublet model, this study demonstrates that nucleon interactions and the nuclear liquid-gas phase transition significantly influence net-baryon number fluctuations in low-energy heavy-ion collisions, providing a good description of STAR Collaboration data below sNN≈4\sqrt{s_{NN}} \approx 4 GeV when self-consistently determined chemical freeze-out scenarios are applied.

Mattia Recchi, Shi Yin2026-09-16
⚛️ high-energy experiments

Cosmological Constrained Axion-Portal Inelastic Dark Matter for the LZ Event

This paper proposes a cosmologically constrained inelastic dark matter model where the long-lived excited state's relic abundance is dynamically determined by early-Universe conversion processes and the Lorentz structure of axion-portal couplings, offering a viable explanation for the high-recoil LZ event through either endothermic or exothermic scattering scenarios that can be distinguished by future annual modulation measurements and collider probes.

Haipeng An, Fei Gao, Jia Liu, Minghao Liu, Changlong Xu2026-09-16
⚛️ high-energy theory

On the relaxation dynamics of non-equilibrium quantum systems

This paper investigates the relaxation dynamics of approximately conserved charges in interacting quantum systems near local equilibrium by demonstrating that Zubarev's non-equilibrium statistical operator approach and a simpler local-equilibrium construction both yield a leading relaxation rate determined by equilibrium correlation functions, which can be extended to diffusion-relaxation equations and validated against kinetic descriptions in models like electroweak B+L washout.

Matthias Carosi, Björn Garbrecht, Silvia Pla, Nils Wagner, Edward Wang2026-09-16
⚛️ nuclear theory

Rotational Brownian Motion and J/ψ\mathrm{J/\psi} Spin Alignment in Heavy-Ion Collisions

This paper proposes a microscopic mechanism for J/ψ\mathrm{J}/\psi spin alignment in heavy-ion collisions by deriving the polarization of charm quark pairs through rotational Brownian motion and spin-vorticity coupling in a strong magnetic field, ultimately linking these dynamics to the observed spin-density matrix element ρ00\rho_{00} via hadronization.

Bhagyarathi Sahoo, Captain R. Singh2026-09-16
⚛️ high-energy experiments

NuSmear: Fast Simulation of Energy Smearing and Angular Smearing for Neutrino-Nucleon Scattering Events in the GENIE Event Generator

This paper introduces NuSmear, a fast and geometry-independent simulation system built on the GENIE event generator that efficiently models energy and angular smearing for neutrino-nucleon scattering events, offering a computationally efficient alternative to full Monte Carlo simulations while maintaining predictive accuracy through rigorous validation.

Ishaan Vohra2026-09-15