⚛️ Category

hep-ph

5500 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

Mass spectra of charged mesons and the quenching of vector meson condensation via exact phase-space diagonalization

Using an exact non-commutative phase-space framework within the two-flavor NJL model, this paper demonstrates that the π+\pi^+ mass follows the kinematic zero-point energy drift to preserve the Goldstone theorem, while the predicted tachyonic instability of the ρ+\rho^+ meson is quenched because magnetic catalysis raises the continuum threshold faster than Zeeman splitting can induce condensation.

Jingyi Chao, Kun Xu2026-04-28
⚛️ phenomenology

Consistent NeffN_{\rm eff} fitting in big bang nucleosynthesis analysis

This paper argues that the conventional method of fitting NeffN_{\rm eff} in Big Bang Nucleosynthesis (BBN) is inconsistent when dealing with negative deviations (ΔNeff<0\Delta N_{\rm eff} < 0), and proposes that such scenarios must instead account for the physical suppression of neutrino-driven reaction rates to avoid unphysical results.

Sougata Ganguly, Tae Hyun Jung, Seokhoon Yun2026-04-27
⚛️ phenomenology

A Compact Story of Positivity in de Sitter

This article resolves apparent discrepancies between the spectral representation and calculations within the Soft-de-Sitter Effective Theory (SdSET) for the anomalous dimensions of principal series fields coupled to compact scalar vertex operators, simultaneously provides new proofs for positivity conditions, and demonstrates the equivalence between the renormalization group flow in SdSET and the resummation of bubble diagrams.

Priyesh Chakraborty, Timothy Cohen, Daniel Green, Yiwen Huang2026-04-27
⚛️ phenomenology

Probing Lepton Flavour Universality with Λb\Lambda_b decays to τ+τ−\tau^+\tau^- final states

This paper investigates the rare baryonic decay Λb→Λτ+τ−\Lambda_b \to \Lambda \tau^+ \tau^- as a tool to search for new physics, demonstrating that the lepton-flavour-universality ratio RΛτ/μR_{\Lambda}^{\tau/\mu} can be precisely predicted within the Standard Model and significantly enhanced by potential new physics coupled to third-generation fermions.

Marzia Bordone, Gino Isidori, Christiane Mayer, Jan-Niklas Toelstede2026-04-27