3277 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.
This paper employs QCD sum rules to investigate the masses of purely top-quark bound states, finding that the calculated pseudoscalar toponium mass aligns with recent CMS and ATLAS observations near the threshold while also providing theoretical predictions for the vector toponium and triply-top baryon to guide future high-energy collider experiments.
This paper investigates how shear viscosity in the post-inflationary universe modifies the propagation of primordial gravitational waves, demonstrating that viscosity induces additional damping and spectral running—such as a blue tilt from freeze-out in the electron-photon-baryon plasma—thereby altering the gravitational wave energy density spectrum by approximately .
This paper validates the accuracy of Asymptotic Padé predictions against exact five-loop QCD results and recent findings, then leverages this success to provide new six-loop predictions for QCD and eight-loop predictions for theory.
Using symplectic model order reduction, this paper demonstrates that the minimal number of canonical degrees of freedom required to describe the Hamiltonian evolution of a regularised scalar field scales with the area of the region rather than its volume, a phenomenon driven by the count of distinct normal-mode frequencies and observed in both flat and curved spacetimes as well as weakly interacting theories.
This paper presents a novel framework for calculating the neutrino-neutrino collision term in the Boltzmann hierarchy that incorporates both neutrino and mediator masses as free parameters, enabling a smooth transition between light and heavy mediator regimes and providing a robust tool for testing neutrino self-interaction scenarios across a wide range of cosmological conditions.
This paper utilizes the SNO experiment's sensitivity to neutral current signals and CANDU reactor production mechanisms to derive novel constraints on MeV-scale spin-dependent dark matter, excluding cross sections above for masses up to 1.5 MeV and setting tighter limits of via solar interactions.
This paper provides a unified derivation of the full bispectrum shapes for single, double, and triple exchange processes involving massive scalars in the Cosmological Collider framework and reports a null result from Planck data, while identifying a 1.5 hint of non-Gaussianity in an extended scenario featuring a scalar chemical potential that allows for on-shell production of super-Hubble mass particles.
This paper proposes a new class of qubit-efficient quantum algorithms based on Dicke states and the $su(2)$ spin algebra to simulate collective neutrino oscillations in dense gases, demonstrating their superior performance on both classical and quantum hardware by fully exploiting the system's symmetries.
This paper establishes fermion field transformations for two Higgs doublet models compatible with a newly discovered class of symmetries, revealing new regions of parameter space invariant under renormalization to all orders of perturbation theory.
This paper investigates the potential for the Mu2e experiment to detect lepton-flavor-violating transitions in muonic atoms mediated by axion-like particles, concluding that while light mediators can parametrically enhance the rate, stringent constraints from electron anomalous magnetic moments and other flavor-violating processes severely limit the observable branching ratio to at most , making the upcoming Mu3e experiment the most promising probe for the viable parameter space.