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.

⚛️ phenomenology

Accumulating Hints for Flavour Violating Higgses at the Electroweak Scale

This paper demonstrates that extending the Standard Model with a second Higgs doublet can simultaneously explain multiple experimental anomalies, including flavor-violating Higgs decays, the W mass discrepancy, and B-physics tensions, while remaining consistent with stringent flavor constraints and predicting testable signatures like modified Higgs-tau couplings and top-quark flavor-changing decays at the LHC.

Andreas Crivellin, Syuhei Iguro2026-06-30

⚛️ high-energy experiments

Direct Detection of Ultralight Dark Matter via Charged Lepton Flavor Violation

This paper proposes a direct detection strategy for ultralight dark matter by searching for time-dependent modulations in charged lepton flavor-violating decays (such as $\mu \to e\phi'$ and $\tau \to e(\mu)\phi'$ ) at accelerator-based experiments like Mu3e, Belle-II, and FCC-ee.

Innes Bigaran, Patrick J. Fox, Yann Gouttenoire, Roni Harnik, Gordan Krnjaic, Tony Menzo, Jure Zupan2026-06-30

🤖 machine learning

SparsePixels: Efficient Convolution for Sparse Data on FPGAs

The paper introduces SparsePixels, an FPGA-based framework that achieves constant-latency inference for sparse data by selectively computing only on active pixels, demonstrating a 73-fold speedup over standard dense CNNs for neutrino interaction identification with minimal performance loss.

Ho Fung Tsoi, Dylan Rankin, Vladimir Loncar, Philip Harris2026-06-30

⚛️ phenomenology

Polarisation fractions in $B\to V_1 V_2$ : U-Spin constraints and new physics signatures

This paper investigates $B \to V_1 V_2$ decays using U-spin symmetry and finds that while the Standard Model can accommodate the data with free parameters, imposing theoretically motivated hierarchies leads to significant tensions—particularly in $\Delta S = 1$ modes like $B_s \to K^{*0} \overline{K^{*0}}$ —which cannot be fully resolved by simplistic new physics scenarios without invoking large non-factorizable contributions.

Debajyoti Choudhury, Suman Kumbhakar, Anirban Kundu, Soumitra Nandi2026-06-30

⚛️ high-energy experiments

Search for dimuon resonance in the 35 to 75 GeV mass range using 140 fb $^{-1}$ of 13 TeV $pp$ collisions with the ATLAS detector

Using 140 fb $^{-1}$ of 13 TeV proton-proton collision data collected by the ATLAS detector, this study employs Gaussian process regression to model background challenges in a search for dimuon resonances between 35 and 75 GeV, finding no significant excess and setting new constraints on dark-photon and dark-matter-mediator models.

ATLAS Collaboration2026-06-30

⚛️ nuclear experiments

Soft Contributions Stabilize NNLO QCD Corrections to Quarkonium Production and Decay

This paper identifies the origin of perturbative instabilities in NNLO QCD corrections to quarkonium production and decay within non-relativistic QCD and proposes a simple remedy involving soft contributions that significantly improves convergence and agreement with experimental data for S-wave color-singlet processes.

Luca Maxia, Hua-Sheng Shao, Lukas Simon, Guoxing Wang2026-06-30

⚛️ phenomenology

Polarization interference in exclusive $V+$ jets at all orders in $\alpha_s$

This paper demonstrates that transverse-longitudinal polarization interference in exclusive $V+$ jets processes vanishes upon phase-space integration for $\gamma^*$ decays but is softened by parity violation for $W$ and $Z$ bosons, providing a framework to account for fiducial cuts and implications for new physics and heavy ion collisions.

Trina Basu, Richard Ruiz2026-06-30

⚛️ phenomenology

Defining a Minimum Resolution for Unbinned Analyses

This paper introduces the Minimum Resolution Likelihood (MRL) method, which defines a Fiducial Signal Region to convert systematic uncertainties into statistical ones, thereby ensuring unbiased signal strength estimation in collider analyses that utilize Machine Learning models.

Manuel Szewc2026-06-30

⚛️ high-energy experiments

Study of the $e^+e^-\to π^+π^-D_s^+D_s^-$ process from $\sqrt{s}$ = 4.42 to 4.95 GeV at BESIII

Using 8.5 fb⁻¹ of collision data collected by the BESIII detector at center-of-mass energies between 4.42 and 4.95 GeV, this study reports no significant signal for the $e^+e^-\to \pi^+\pi^-D_s^+D_s^-$ process, instead establishing 90% confidence level upper limits on its Born cross sections and finding no evidence for intermediate charmonium-like resonances in the $D_s^+D_s^-$ invariant-mass spectrum.

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, C. S. Akondi, R. Aliberti, A. Amoroso, Q. An, M. (…)2026-06-30

⚛️ phenomenology

Searching for the $G(3900)$ via the $K^- p \to D_s^- \Lambda_c^+ G(3900)^0$ reaction

This paper proposes searching for the $G(3900)$ structure via the $K^- p \to D_s^- \Lambda_c^+ G(3900)^0$ reaction using an effective Lagrangian approach to determine its nature as a genuine resonance or molecular state, free from the interference effects present in $e^+e^-$ collisions.

Qing Lu, Cai Cheng, Yin Huang2026-06-30

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hep-ex

Accumulating Hints for Flavour Violating Higgses at the Electroweak Scale

Direct Detection of Ultralight Dark Matter via Charged Lepton Flavor Violation

SparsePixels: Efficient Convolution for Sparse Data on FPGAs

Polarisation fractions in B→V1V2B\to V_1 V_2B→V1​V2​: U-Spin constraints and new physics signatures

Search for dimuon resonance in the 35 to 75 GeV mass range using 140 fb−1^{-1}−1 of 13 TeV $pp$ collisions with the ATLAS detector

Soft Contributions Stabilize NNLO QCD Corrections to Quarkonium Production and Decay

Polarization interference in exclusive V+V+V+jets at all orders in αs\alpha_sαs​

Defining a Minimum Resolution for Unbinned Analyses

Study of the e+e−→π+π−Ds+Ds−e^+e^-\to π^+π^-D_s^+D_s^-e+e−→π+π−Ds+​Ds−​ process from s\sqrt{s}s​ = 4.42 to 4.95 GeV at BESIII

Searching for the G(3900)G(3900)G(3900) via the K−p→Ds−Λc+G(3900)0K^- p \to D_s^- \Lambda_c^+ G(3900)^0K−p→Ds−​Λc+​G(3900)0 reaction

Polarisation fractions in $B\to V_1 V_2$ : U-Spin constraints and new physics signatures

Search for dimuon resonance in the 35 to 75 GeV mass range using 140 fb $^{-1}$ of 13 TeV $pp$ collisions with the ATLAS detector

Polarization interference in exclusive $V+$ jets at all orders in $\alpha_s$

Study of the $e^+e^-\to π^+π^-D_s^+D_s^-$ process from $\sqrt{s}$ = 4.42 to 4.95 GeV at BESIII

Searching for the $G(3900)$ via the $K^- p \to D_s^- \Lambda_c^+ G(3900)^0$ reaction