hep-ph papers | Gist.Science

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.

⚛️ nuclear experiments

Disentangling baryon stopping and neutron skin effects in heavy-ion collisions

This paper proposes a statistical model analysis of heavy-ion collisions that quantitatively extracts baryon-stopping parameters from isobar data and introduces a new oxygen-baseline observable to systematically probe neutron-skin thickness across various collision systems and energies.

Grégoire Pihan, Volodymyr Vovchenko2026-04-29

⚛️ phenomenology

JWST Constraints on Primordial Magnetic Fields

This paper demonstrates that constraints on the reionization history derived from JWST-calibrated UV luminosity functions, when combined with Planck CMB optical depth measurements, place stringent upper limits on the amplitude of primordial magnetic fields ( $\sqrt{\langle B^2 \rangle} < 0.18\text{--}0.27$ nG) by ruling out the double reionization scenario they would otherwise induce.

Malcolm Fairbairn, María Olalla Olea-Romacho, Juan Urrutia, Ville Vaskonen2026-04-29

⚛️ phenomenology

spectroxide: A code package for computing cosmic microwave background spectral distortions

This paper introduces *spectroxide*, an AI-assisted Rust and Python code package for computing cosmic microwave background spectral distortions, and presents it as a case study demonstrating the critical role of human domain expertise in identifying physics-specific errors that automated testing missed during AI-driven scientific software development.

Ethan Baker, Hongwan Liu, Siddharth Mishra-Sharma2026-04-29

⚛️ phenomenology

Next-to-next-to-leading QCD corrections to the $\mathbf{B^+}$ - $\mathbf{B_d^0}$ , $\mathbf{D^+}$ - $\mathbf{D^0}$ , and $\mathbf{D_s^+}$ - $\mathbf{D^0}$ lifetime ratios

This paper presents next-to-next-to-leading QCD corrections to the lifetime ratios of $B^+$ , $D^+$ , $D_s^+$ , and $D^0$ mesons, combining three-loop perturbative calculations with hadronic matrix elements to produce theoretical predictions that show good agreement with experimental data.

Francesco Moretti, Ulrich Nierste, Pascal Reeck, Matthias Steinhauser2026-04-29

⚛️ phenomenology

Accidental Peccei-Quinn Symmetry from Chiral Gauge Symmetry and Mirror QCD

This paper proposes a novel solution to the strong CP problem where an accidental Peccei-Quinn symmetry emerges from a chiral U(1) gauge symmetry and is broken by mirror QCD dynamics, simultaneously explaining dark matter, baryogenesis, and generating observable gravitational waves and LHC signatures without requiring a light QCD axion or massless fermions.

Hajime Fukuda, Keisuke Harigaya2026-04-29

⚛️ phenomenology

The Angular Observables of $\Lambda_b \to \Lambda_c(\to \Lambda^0 \pi^+) \, \tau^-(\to \pi^- \nu_\tau)\, \bar{\nu}_\tau$ within the Paradigm of FCCC Anomalies

This contribution presents a global analysis of $B$ -meson flavor anomalies extended to the baryonic sector and demonstrates that the decay $\Lambda_b^0 \to \Lambda_c^+(\to \Lambda^0 \pi^+) \tau^-(\to \pi^- \nu_\tau)\bar{\nu}_\tau$ provides a powerful, independent probe for New Physics, with the $(C_{V_L}, C_{S_R})$ scenario identified as the most favored solution and specific angular observables serving as highly sensitive indicators for potential CP-violating or CP-conserving dynamics.

Muhammad Arslan, Ishtiaq Ahmed, Muhammad Jamil Aslam2026-04-29

⚛️ phenomenology

Forward backward CP asymmetry in $\tau^- \to K \pi \nu_{\tau}$ in the Left-Right Inverse seesaw model

This paper investigates the Left-Right Inverse Seesaw model's ability to explain CP violation in $\tau^- \to K \pi \nu_{\tau}$ decays, finding that while it cannot account for the integrated CP asymmetry observed by BaBar, it predicts a distinctive and pronounced signal in the differential forward-backward CP asymmetry driven by a non-decoupling scalar operator.

David Delepine, Shaaban Khalil2026-04-29

⚛️ phenomenology

NMSSMScanner: Efficient Scans in the NMSSM Parameter Space Proof of Concept

This paper introduces NMSSMScanner, a new tool designed to efficiently scan the complex parameter space of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) under all relevant constraints, demonstrating its utility by identifying configurations that maximize resonant Higgs boson pair production.

Rafael Boto, Thi Nhung Dao, Felix Egle, Karim Elyaouti, Martin Gabelmann, Margarete Mühlleitner, Johann Plotnikov2026-04-29

⚛️ phenomenology

Basis for non-derivative baryon-number-violating operators

This paper presents a minimal basis for non-derivative baryon-number-violating operators in the Standard Model Effective Field Theory up to mass dimension 11, as well as specific dimension-12 operators, offering a set of terms that generally features fewer components and simpler contractions than existing results while acknowledging cases where minimality conflicts with structural simplicity.

Julian Heeck, Brandon B. Le2026-04-29

⚛️ phenomenology

On the Role of Prompt Photons in the Anisotropic Emission of Direct Photons -- Direct Photons from Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV with IP-Glasma Initial Condition

Using a (3+1)-dimensional viscous hydrodynamic model with IP-Glasma initial conditions, this study demonstrates that accurately accounting for prompt photon contributions resolves the long-standing discrepancy between theoretical predictions and experimental measurements of direct photon anisotropic flow in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV.

Fu-Ming Liu2026-04-29

← Previous Next →

hep-ph

Disentangling baryon stopping and neutron skin effects in heavy-ion collisions

JWST Constraints on Primordial Magnetic Fields

spectroxide: A code package for computing cosmic microwave background spectral distortions

Next-to-next-to-leading QCD corrections to the B+\mathbf{B^+}B+-Bd0\mathbf{B_d^0}Bd0​, D+\mathbf{D^+}D+-D0\mathbf{D^0}D0, and Ds+\mathbf{D_s^+}Ds+​-D0\mathbf{D^0}D0 lifetime ratios

Accidental Peccei-Quinn Symmetry from Chiral Gauge Symmetry and Mirror QCD

The Angular Observables of Λb→Λc(→Λ0π+) τ−(→π−ντ) νˉτ\Lambda_b \to \Lambda_c(\to \Lambda^0 \pi^+) \, \tau^-(\to \pi^- \nu_\tau)\, \bar{\nu}_\tauΛb​→Λc​(→Λ0π+)τ−(→π−ντ​)νˉτ​ within the Paradigm of FCCC Anomalies

Forward backward CP asymmetry in τ−→Kπντ\tau^- \to K \pi \nu_{\tau}τ−→Kπντ​ in the Left-Right Inverse seesaw model

NMSSMScanner: Efficient Scans in the NMSSM Parameter Space Proof of Concept

Basis for non-derivative baryon-number-violating operators

On the Role of Prompt Photons in the Anisotropic Emission of Direct Photons -- Direct Photons from Au+Au collisions at sNN=200\sqrt{s_{NN}}=200sNN​​=200 GeV with IP-Glasma Initial Condition

Next-to-next-to-leading QCD corrections to the $\mathbf{B^+}$ - $\mathbf{B_d^0}$ , $\mathbf{D^+}$ - $\mathbf{D^0}$ , and $\mathbf{D_s^+}$ - $\mathbf{D^0}$ lifetime ratios

The Angular Observables of $\Lambda_b \to \Lambda_c(\to \Lambda^0 \pi^+) \, \tau^-(\to \pi^- \nu_\tau)\, \bar{\nu}_\tau$ within the Paradigm of FCCC Anomalies

Forward backward CP asymmetry in $\tau^- \to K \pi \nu_{\tau}$ in the Left-Right Inverse seesaw model

On the Role of Prompt Photons in the Anisotropic Emission of Direct Photons -- Direct Photons from Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV with IP-Glasma Initial Condition