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.

Spin density matrix of baryon-antibaryon pairs in electron-positron annihilation with $P$ and $CP$ violation including electron mass

This paper derives a comprehensive and compact spin density matrix for octet baryon-antibaryon pairs produced in polarized electron-positron annihilation within the one-photon-exchange approximation, explicitly incorporating parity and CP violation effects alongside finite electron mass corrections to facilitate the study of angular distributions and quantum entanglement.

Chun-Qiu Zhao, Xu Cao, Jian-Ping Dai2026-03-24⚛️ hep-ph

Description of the baryon mass spectrum by open strings and diquarks

This paper demonstrates that the mass spectra of both mesons and baryons are accurately described by a parameter-free open-string model with a consistent Hagedorn temperature of approximately 0.34 GeV, supporting the view of baryons as quark-diquark systems and offering new insights into quark deconfinement.

Yuki Fujimoto2026-03-24⚛️ nucl-th

Axion Signal Search Using Hybrid Nuclear-Electronic Spin Systems

This paper proposes a hybrid nuclear-electronic spin sensor utilizing hyperfine interactions in silicon $^{209}\text{Bi}$ donors to overcome the low-frequency sensitivity limits of conventional nuclear magnetic resonance, thereby enabling compact solid-state detection of galactic axions with projected sensitivity exceeding direct nuclear methods by an order of magnitude.

Xiangjun Tan, Zhanning Wang2026-03-24⚛️ hep-ex

Higgs Decays at NLO in the SMEFT

This paper presents a comprehensive calculation of two-, three-, and four-body Higgs decay rates at next-to-leading order in both QCD and electroweak interactions within the dimension-6 SMEFT framework, implemented in the publicly available Monte Carlo program NEWiSH to assess the impact of these corrections on future collider projections.

Luigi Bellafronte, Sally Dawson, Clara Del Pio, Matthew Forslund, Pier Paolo Giardino2026-03-24⚛️ hep-ph

Elliptic flow of charm quarks produced in the early stage of pA collisions

This paper demonstrates that charm quarks produced in the early pre-equilibrium glasma stage of high-energy proton-nucleus collisions acquire significant elliptic flow ( $v_2$ ) through interactions with non-Abelian fields, suggesting that pre-hydrodynamic dynamics play a crucial role in the observed heavy-flavor collectivity in small systems.

Gabriele Parisi, Fabrizio Murgana, Vincenzo Greco, Marco Ruggieri2026-03-24⚛️ nucl-th

Probing Atomic Dark Matter with Stellar Streams in Milky Way-Mass Galaxies

This study utilizes a cosmological hydrodynamic simulation to demonstrate that a sub-component of dissipative Atomic Dark Matter enhances the central density of satellite galaxies, thereby delaying the formation of stellar streams, prolonging their star formation, and altering their chemical abundance patterns compared to standard Cold Dark Matter models.

Lucas S. Mandacarú Guerra, Stephanie O'Neil, Mariangela Lisanti, Sandip Roy, Robyn Sanderson, Aritra Kundu, Arpit Arora, Lina Necib, Nora Shipp, Xuejian Shen2026-03-24🔭 astro-ph

The impact of gamma-ray propagation effects on indirect dark matter searches

This paper demonstrates that neglecting the regeneration of high-energy gamma rays via inverse Compton scattering by secondary electrons and positrons during propagation can lead to significant underestimations of the observed flux from distant dark matter annihilation, thereby necessitating a more detailed treatment of these effects to derive accurate indirect detection limits.

Ignacio Martínez López, Rafael Alves Batista, Miguel A. Sánchez-Conde, Antonio Juan Rubio-Montero2026-03-24🔭 astro-ph

Uncertainty quantification of holographic transport and energy loss for the hot and baryon-dense QGP

This paper presents an open-source C++ implementation of a holographic Einstein-Maxwell-Dilaton model with improved numerical stability to quantify uncertainties in various transport coefficients and energy loss parameters across the QCD phase diagram by propagating lattice QCD constraints via Bayesian sampling.

Musa R. Khan, Ayrton Nascimento, Yumu Yang, Joaquin Grefa, Mauricio Hippert, Jorge Noronha, Claudia Ratti, Romulo Rougemont2026-03-24⚛️ nucl-th

Probing the Higgs Self-Coupling with an XFEL Compton $\gamma\gamma$ Collider at $\sqrt{s} = 380$ GeV

This study demonstrates that an X-ray free-electron laser Compton $\gamma\gamma$ collider operating at $\sqrt{s} = 380$ GeV could probe the Higgs self-coupling with a precision of 7% to 12% in the $bb\overline{bb}$ channel by employing boosted decision trees and genetic algorithm optimization, establishing it as a powerful complementary tool to future $e^+e^-$ and hadron colliders for investigating electroweak symmetry breaking.

Santiago Ampudia Castelazo, Umar Sohail Qureshi, Tim Barklow, Ariel Schwartzman2026-03-24⚛️ hep-ph

Additional TeV-Scale Particles Predicted by Quartification

This paper utilizes an $SU(3)^4$ quiver gauge theory to classify and predict four distinct scenarios of additional TeV-scale particles that could be discovered during the Run 4 of the upgraded LHC, which is scheduled to begin in 2030.

Paul H. Frampton, Thomas W. Kephart2026-03-24⚛️ hep-ph

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hep-ph

Spin density matrix of baryon-antibaryon pairs in electron-positron annihilation with PPP and $CP$ violation including electron mass