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.

⚛️ high-energy experiments

The Deconstruction of Flavor in the Privately Democratic Higgs Sector

This paper proposes a model utilizing vector-like quarks and scalar messengers with hierarchical vacuum expectation values to explain the quark mass hierarchy and generate the CKM matrix independently of fermion masses, thereby addressing the Standard Model's inability to account for flavor structure.

Bhubanjyoti Bhattacharya (Lawrence Technological University), Suneth Jayawardana (Wayne State University), Nausheen R. S (…)2026-03-16
⚛️ phenomenology

Estimating the Lensing Probability for Binary Black Hole Mergers in AGN disk by Using Mismatch Threshold

This paper proposes a more realistic method for estimating the gravitational lensing probability of binary black hole mergers in AGN disks by using a mismatch threshold relative to signal-to-noise ratio, revealing that the detection probability for LIGO-Virgo-KAGRA O3 runs is several times higher than previous Einstein-criterion-based estimates.

Wen-Long Xu, Yu-Zhe Li, Yi-Gu Chen, Hui Li, Wei-Hua Lei2026-03-16
⚛️ nuclear theory

Pion Valence Structure at Intermediate x in the Residual Field Approach

This paper calculates the pion valence parton distribution function using a spectral function approach with phenomenological Light-Front wave functions, revealing that the observed intermediate-x behavior and (1−x)(1-x) limit are driven by a highly virtual qqˉq\bar{q} cluster carrying most of the momentum with minimal residual mass, thereby linking the PDF's peak characteristics directly to its analytic behavior at x→1x \to 1.

Joseph Maerovitz, Christopher Leon, Misak Sargsian2026-03-16
⚛️ phenomenology

Constraining new physics effective interactions via a global fit of electroweak, Drell-Yan, Higgs, top, and flavour observables

This paper presents a comprehensive global fit within the HEPfit framework that constrains Standard Model parameters and dimension-6 SMEFT Wilson coefficients by simultaneously analyzing electroweak, Drell-Yan, Higgs, top, and flavour observables while consistently incorporating leading-order scale evolution and considering both U(3)5U(3)^5 and U(2)5U(2)^5 flavour symmetry limits.

J. de Blas, A. Goncalves, V. Miralles, L. Reina, L. Silvestrini, M. Valli2026-03-16
⚛️ phenomenology

Amplitude Uncertainties Everywhere All at Once

This paper proposes and evaluates methods for generating ultra-fast, precise amplitude surrogates for LHC event generation by investigating noise reduction in network ensembles, establishing evidential regression as a sampling-free uncertainty quantification tool, and demonstrating that learned uncertainties effectively identify numerical noise and data gaps in amplitude regression.

Henning Bahl, Nina Elmer, Tilman Plehn, Ramon Winterhalder2026-03-16
⚛️ high-energy theory

Quasi-Dirac fermion: A source of neutrino mass and dark matter

This paper proposes that TeV-scale quasi-Dirac fermions, arising from lepton-symmetry violations in unified theories, simultaneously generate small radiative neutrino masses and provide a stable dark matter candidate, with their tiny mass splitting ensuring consistency with experimental constraints on dark matter detection and charged lepton flavor violation.

Nguyen Thi Nguyet Nga, Nguyen Huy Thao, Phung Van Dong2026-03-16
⚛️ phenomenology

Minimal A4 Type-II Seesaw Realization of Testable Neutrino Mass Sum Rules

This paper proposes a minimal A4A_4-symmetric type-II seesaw model that generates a neutrino mass sum rule fully determining the absolute mass spectrum and predicting inverted ordering, specific Majorana phases, and a maximal neutrinoless double beta decay rate, while simultaneously suppressing muon flavor-violating processes through an approximate triality symmetry in the charged lepton sector.

Salvador Centelles Chuliá, Ranjeet Kumar2026-03-16