⚛️ Category

hep-ex

2591 papers

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

Searching for vector-like leptons decaying into an electron and missing transverse energy in e+^{+}e−^{-} collisions with s=240\sqrt{s} = 240 GeV at the FCC-ee

This study utilizes Monte Carlo simulations of electron-positron collisions at the FCC-ee with a center-of-mass energy of 240 GeV and an integrated luminosity of 10.8 ab−1^{-1} to search for vector-like leptons decaying into electrons and missing transverse energy within a lepton portal dark matter framework, ultimately establishing 95% confidence level exclusion limits on the vector-like lepton mass and Yukawa coupling in the absence of a signal.

S. Elgammal2026-04-07
⚛️ high-energy experiments

CP-violation effects in neutral meson oscillations in the left-right weak interaction model

This paper demonstrates that the recently observed need for a right-handed vector boson admixture in neutron decay successfully explains CP-violation effects in neutral meson oscillations (K0K^0, D0D^0, B0B^0, and Bs0B_s^0) within an extended left-right weak interaction model, suggesting that the nature of CP violation is fundamentally linked to the presence of right-handed currents.

A. P. Serebrov, O. M. Zherebtsov, A. K. Fomin, R. M. Samoilov, N. S. Budanov2026-04-07
⚛️ high-energy experiments

Bc\boldsymbol{B_c} Meson Spectroscopy from Bayesian MCMC: Probing Confinement and State Mixing

This paper presents a comprehensive Bayesian MCMC analysis of the BcB_c meson spectrum using standard and logarithmically modified Cornell potentials to rigorously quantify uncertainties, probe the sensitivity of excited states to confinement forms, and provide updated theoretical predictions for future experimental benchmarks.

Christas Mony A., Rohit Dhir2026-04-07
⚛️ high-energy experiments

Muonic Boson Limits: Supernova Redux

This paper derives updated supernova constraints on muon-philic scalars and pseudoscalars by incorporating two-photon couplings from muon triangle loops, revealing that while globular-cluster limits dominate for light masses, supernova 1987A gamma-ray observations and energy-loss arguments impose stringent bounds on heavier masses that challenge the viability of these bosons explaining the muon magnetic-moment anomaly.

Andrea Caputo, Georg Raffelt, Edoardo Vitagliano2026-04-06
⚛️ high-energy experiments

ITACA revisited: Ion Tracking Apparatus with CMOS ASICs

This paper presents a conceptual design for the ITACA detector, a 1-tonne high-pressure xenon gas TPC that utilizes a novel Magnetically Actuated Rotor System (MARS) and Topmetal CMOS ASICs to image both electron and ion tracks, thereby enhancing topological discrimination to achieve a neutrinoless double beta decay sensitivity exceeding 102810^{28} years.

J. J Gómez-Cadenas, L. Arazi, G. Martínez-Lema, J. Renner, S. R. Soleti, S. Torelli2026-04-06
⚛️ high-energy experiments

Evidence of ZZγ\gamma production and observation of 4ℓγ4\ell\gamma in proton-proton collisions at s\sqrt{s} = 13 TeV

Using 138 fb−1^{-1} of proton-proton collision data at 13 TeV, the CMS experiment reports the first evidence for ZZγ\gamma production with a 3.7σ\sigma significance and the first observation of inclusive 4ℓγ\ell\gamma production with a 5.0σ\sigma significance, providing measured fiducial cross sections for both processes.

CMS Collaboration2026-04-06