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

Gauge-Invariant Longitudinal Modes in the Herwig 7 Electroweak Parton Shower

This paper presents a gauge-invariant scheme for longitudinal electroweak gauge bosons in the Herwig 7 parton shower by incorporating Ward-identity-fixed Goldstone-matching terms, which ensures numerical stability and controlled corrections at lower energy scales while preserving the transverse sector and yielding interpretable shifts in electroweak-sensitive observables.

M. R. Masouminia, P. Richardson2026-03-19
⚛️ phenomenology

Higher-point Energy Correlators: Factorization in the Back-to-Back Limit & Non-perturbative Effects

This paper introduces a new parametrization for N-point energy correlators that enables the derivation of a general factorization theorem in the back-to-back limit and the analytic determination of leading non-perturbative power corrections for arbitrary N, including non-integer values, thereby facilitating future precision extractions of the strong coupling constant.

Ankita Budhraja, Isabelle Pels, Wouter J. Waalewijn2026-03-19
⚛️ phenomenology

Multi-Component Dark Matter as a Solution to the Galactic Center GeV Excess

This paper demonstrates that a multi-component dark matter model, specifically one with two distinct particle species annihilating exclusively into single final states, provides a statistically superior explanation for the Galactic Center GeV Excess compared to the traditional single-particle paradigm, effectively resolving spectral mismatches and alleviating tension with current constraints.

Farinaldo S. Queiroz, Clarissa Siqueira, Carlos E. Yaguna2026-03-19
⚛️ phenomenology

Impact of New Physics on the JUNO-Long-Baseline Synergy in Neutrino Mass Ordering Determination

This paper investigates the robustness of the JUNO-long-baseline synergy in determining the neutrino mass ordering under new physics scenarios, finding that while Scalar Non-Standard Interactions have negligible impact, couplings to ultralight scalar fields can lead to incorrect inferences, though these effects can ultimately be disentangled to also serve as a probe for new physics.

Gustavo F. S. Alves, Hiroshi Nunokawa, Renata Zukanovich Funchal2026-03-19
⚛️ phenomenology

Ultralight Scalar Dark Matter with Off-Diagonal Flavor Couplings

This paper investigates a model where an ultralight scalar dark matter field couples off-diagonally to down-type quarks, deriving analytic expressions for the resulting oscillatory shifts in quark masses and CKM parameters, and establishing constraints on these flavor-violating couplings by combining precision flavor measurements, nuclear β\beta decays, atomic clocks, pulsar timing, and meson observables.

Jinhui Guo, Jia Liu, Chenhao Peng, Xiao-Ping Wang, Hang Zhao2026-03-19
⚛️ phenomenology

Lepton flavor violating τiij+\tau^- \to \ell_i^- \ell_i^- \ell_j^+ (ij\ell_i\neq \ell_j) decays induced by S1S_1 and R2R_2 scalar leptoquarks

This paper investigates one-loop induced lepton flavor violating tau decays (τiij+\tau^- \to \ell_i^- \ell_i^- \ell_j^+) mediated by S1S_1 and R2R_2 scalar leptoquarks, demonstrating that within parameter spaces consistent with current experimental constraints, the predicted branching ratios could reach the sensitivity of near-future experiments.

G. Hernández-Tomé, J. P. Hoyos-Daza, O. G. Miranda, R. Sánchez-Vélez2026-03-19
⚛️ phenomenology

Exploring the ttˉt\bar{t} threshold at an electron-positron collider

This paper presents a prospect study demonstrating that a future Circular Electron-Positron Collider (CEPC) can achieve a top-quark mass measurement precision of a few MeV—nearly two orders of magnitude better than HL-LHC projections—by scanning the ttˉt\bar{t} threshold, though this potential is currently limited by theoretical uncertainties in cross-section calculations.

Leyan Li, Yuming Lin, Xiaohu Sun, Yajun Mao, Zhan Li, Kaili Zhang, Shudong Wang, Gang Li, Hongbo Liao, Yaquan Fang2026-03-19