hep-ex papers | Gist.Science

Hep-Ex explores the fascinating intersection where particle physics meets experimental reality. This field investigates how scientists build massive detectors and accelerate particles to test the fundamental laws of nature, turning abstract theories into measurable data. It is the rigorous process of searching for new particles or forces that could reshape our understanding of the universe, often requiring years of collaboration and engineering.

At Gist.Science, we ensure these discoveries become accessible to everyone. We process every new preprint in this category directly from arXiv, generating both plain-language explanations for curious readers and detailed technical summaries for specialists. Our goal is to bridge the gap between complex experimental results and public understanding without losing scientific nuance.

Below are the latest papers in Hep-Ex, freshly summarized and ready for you to explore.

⚛️ high-energy experiments

Probing the nature of the $\chi_{c1}(3872)$ state using radiative decays

Using proton-proton collision data from the LHCb detector, this study observes the radiative decay $\chi_{c1}(3872)\rightarrow\psi(2S)\gamma$ for the first time and measures a branching ratio that challenges the interpretation of the $\chi_{c1}(3872)$ as a pure $D^0\bar{D}^{*0}$ molecule, strongly suggesting it contains a significant compact charmonium or tetraquark component.

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. Adefisoye, B. A (…)2026-06-02

⚛️ high-energy experiments

Precision Measurement of $D_{s}^{*+} - D_{s}^{+}$ Mass Difference

Using 3.19 fb $^{-1}$ of $e^+e^-$ annihilation data collected at 4.178 GeV with the BESIII detector, this study measures the $D_{s}^{*+} - D_{s}^{+}$ mass difference to be $144\,201.9 \pm 44.2({\rm stat.}) \pm 29.9({\rm syst.}) \pm 15.0({\rm PDG})$ keV/ $c^2$ , achieving a precision approximately seven times greater than the current Particle Data Group average.

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, R. Aliberti, A. Amoroso, Q. An, Y. Bai, O. Bakin (…)2026-06-02

⚛️ high-energy experiments

The Four Polarizations of the $W$ at High Energies

This paper investigates polarization-induced interference and gauge cancellations in high-energy multi-leg processes involving resonant weak bosons by introducing analytical decompositions of polarized propagators and a BRST-guided grouping scheme to refine predictions beyond the narrow-width approximation across various case studies.

Trina Basu, Richard Ruiz2026-06-02

⚛️ high-energy experiments

On the real part of elastic scattering amplitude

The paper discusses the dominance of the imaginary part of the elastic scattering amplitude and advocates for an approximation method based on this dominance.

S. M. Troshin, N. E. Tyurin2026-06-02

⚛️ nuclear experiments

Dependence of two-particle azimuthal correlations on the forward rapidity gap width in pPb collisions at $\sqrt{s_\mathrm{NN}}$ = 8.16 TeV

This paper investigates the dependence of two-particle azimuthal correlations on the forward rapidity gap width in 8.16 TeV pPb collisions to determine if collective flow signatures persist in events enriched with photon-lead and pomeron-lead interactions, comparing the results against previous measurements and modern event generators.

CMS Collaboration2026-06-02

⚛️ high-energy experiments

An AI-ready, Polarized Electron-Positron Collision Dataset

This paper presents a modernized, AI-ready release of approximately 660,000 reconstructed SLD electron-positron collision events and newly digitized internal documentation, converted from legacy formats to facilitate research in both particle physics and machine learning.

Chi Lung Cheng, Simon Corrodi, T. J. Hobbs, Alaettin Serhan Mete, Benjamin Nachman2026-06-02

⚛️ phenomenology

Explaining the $B \to K\mu^+\mu^-$ Anomaly in the Left-Right Inverse Seesaw Model

This paper demonstrates that the Left-Right Inverse Seesaw model can naturally explain the $B \to K\mu^+\mu^-$ anomaly by generating a specific negative shift in the Wilson coefficient $\Delta C_9$ while suppressing $\Delta C_{10}$ through a non-decoupling charged-scalar/heavy-neutrino box mechanism, all while satisfying stringent flavor and collider constraints.

David Delepine, Shaaban Khalil2026-06-02

⚛️ phenomenology

Machine Learning Enhanced Detection of Higgs Chain Decays in Vector Boson Fusion

This paper demonstrates that advanced Deep Learning methodologies applied to low-level calorimeter data can achieve a statistical significance of approximately 4.5σ in detecting heavy CP-even Higgs boson chain decays ( $h_2 \to h_1h_1 \to b\bar b b\bar b$ ) produced via Vector Boson Fusion within the Next-to-Minimal Supersymmetric Standard Model at the LHC with 300 fb $^{-1}$ of integrated luminosity.

Shreecheta Chowdhury, Amit Chakraborty, Stefano Moretti2026-06-02

⚛️ high-energy experiments

Comparisons of triple-differential cross sections for quasielastic-like $\nu_\mu$ -hydrocarbon interactions using $\langle E_\nu\rangle \sim$ 3~GeV versus $\sim$ 6~GeV beams in MINERvA

This MINERvA study compares triple-differential cross sections for quasielastic-like $\nu_\mu$ -hydrocarbon interactions in 3 GeV and 6 GeV beams to test neutrino interaction models, revealing discrepancies that indicate an overestimation of final-state interactions for protons and charged pions in current simulations.

D. Ruterbories (the MINERvA collaboration), S. Akhter (the MINERvA collaboration), Z. Ahmad Dar (the MINERvA collaborati (…)2026-06-02

⚛️ nuclear experiments

Proton High-Order Cumulants in Au+Au Collisions at High Baryon Density from JAM with a Centrality-Independent Framework

This study utilizes the JAM model and a novel Centrality-Independent Genuine Cumulant Analysis (CIGAR) framework to systematically analyze higher-order proton cumulants in Au+Au collisions at high baryon densities, providing a dynamic non-critical baseline essential for the search for the QCD critical point.

Yongcong Xu, Zhaohui Wang, Yu Zhang, Xiaofeng Luo2026-06-02

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hep-ex

Probing the nature of the χc1(3872)\chi_{c1}(3872)χc1​(3872) state using radiative decays

Precision Measurement of Ds∗+−Ds+D_{s}^{*+} - D_{s}^{+}Ds∗+​−Ds+​ Mass Difference

The Four Polarizations of the WWW at High Energies

On the real part of elastic scattering amplitude

Dependence of two-particle azimuthal correlations on the forward rapidity gap width in pPb collisions at sNN\sqrt{s_\mathrm{NN}}sNN​​ = 8.16 TeV

An AI-ready, Polarized Electron-Positron Collision Dataset

Explaining the B→Kμ+μ−B \to K\mu^+\mu^-B→Kμ+μ− Anomaly in the Left-Right Inverse Seesaw Model

Machine Learning Enhanced Detection of Higgs Chain Decays in Vector Boson Fusion

Comparisons of triple-differential cross sections for quasielastic-like νμ\nu_\muνμ​-hydrocarbon interactions using ⟨Eν⟩∼\langle E_\nu\rangle \sim⟨Eν​⟩∼ 3~GeV versus ∼\sim∼ 6~GeV beams in MINERvA

Proton High-Order Cumulants in Au+Au Collisions at High Baryon Density from JAM with a Centrality-Independent Framework

Probing the nature of the $\chi_{c1}(3872)$ state using radiative decays

Precision Measurement of $D_{s}^{*+} - D_{s}^{+}$ Mass Difference

The Four Polarizations of the $W$ at High Energies

Dependence of two-particle azimuthal correlations on the forward rapidity gap width in pPb collisions at $\sqrt{s_\mathrm{NN}}$ = 8.16 TeV

Explaining the $B \to K\mu^+\mu^-$ Anomaly in the Left-Right Inverse Seesaw Model

Comparisons of triple-differential cross sections for quasielastic-like $\nu_\mu$ -hydrocarbon interactions using $\langle E_\nu\rangle \sim$ 3~GeV versus $\sim$ 6~GeV beams in MINERvA