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

Lepton flavor violation in Higgs boson decays at the HL-LHC

This paper investigates the discovery potential of lepton flavor-violating Higgs boson decays within a Froggatt-Nielsen framework at the High-Luminosity LHC, projecting that the heμh \to e\mu and hτμh \to \tau\mu channels could achieve a 5σ5\sigma discovery significance with an integrated luminosity of 1000 fb1^{-1}, while the hτeh \to \tau e channel remains inaccessible.

M. A. Arroyo-Ureña, E. A. Herrera-Chacón, Iran Melendez-Hernández, S. Rosado-Navarro2026-02-26
⚛️ nuclear theory

Unified study of Bs0X(3872)π+π(K+K)B_s^0 \to X(3872) π^+π^- (K^+ K^-) and Bs0ψ(2S)π+π(K+K)B_s^0 \to ψ(2S) π^+π^- (K^+ K^-) processes

This paper presents a unified theoretical description of experimental data for Bs0B_s^0 decays into X(3872)X(3872) and ψ(2S)\psi(2S) accompanied by pion or kaon pairs, utilizing unitary and analytic final-state interactions to reveal universal coupling patterns, a distinct non-charmonium nature for the X(3872)X(3872), and the significant role of the f0(1500)f_0(1500) resonance while predicting related branching fraction ratios and invariant mass distributions.

Yun-Hua Chen2026-02-26
⚛️ phenomenology

Kaon T-even transverse-momentum-dependent distributions and form factors in a self-consistent light-front quark model

This paper presents a self-consistent light-front quark model based on the Bakamjian--Thomas construction to calculate kaon electromagnetic and scalar form factors, as well as unpolarized T-even transverse-momentum-dependent distributions and their collinear PDFs, demonstrating that enforcing four-momentum conservation via a uniform invariant mass implementation yields unique, current-component-independent observables and reveals distinct behaviors between direct and mass-factored scalar definitions.

Yongwoo Choi, Ahmad Jafar Arifi, Ho-Meoyng Choi, Chueng-Ryong Ji2026-02-26
⚛️ phenomenology

Generalizing the Dirac-Majorana Confusion Theorem: The Role of CP-Violating Phases in New Physics Vector Interactions

This paper generalizes the Dirac-Majorana Confusion Theorem by demonstrating that CP-violating flavor-changing neutral current interactions mediated by a new vector boson (ZZ') lift the kinematic mass suppression in Coherent Elastic Neutrino-Nucleus Scattering, thereby enabling the experimental distinction between Dirac and Majorana neutrinos through the imaginary component of the interaction.

David Delepine, A. Yebra2026-02-26
⚛️ high-energy experiments

Coherent Quantum Evaluation of Collider Amplitudes for Effective Field Theory Constraints

This paper presents a hybrid quantum-classical framework that computes leading-order helicity amplitudes for e+e+e^+e^-\to \ell^+\ell^- scattering on gate-based quantum hardware to derive Standard Model and Effective Field Theory constraints consistent with precision collider data.

Yacine Haddad, Kaidi Xu, Vincent Croft, Jad C. Halimeh, Michele Grossi2026-02-26