⚛️ Category

hep-ex

2603 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

Differential measurements of tˉtZ\bar{t}tZ and tˉttˉt\bar{t}t\bar{t}t at large Q2Q^2 at FCC-hh

This paper presents a study of differential tˉtZ\bar{t}tZ and tˉttˉt\bar{t}t\bar{t}t measurements at the FCC-hh with 30 ab−1^{-1} of data at 84 TeV, demonstrating the feasibility of probing high-Q2Q^2 regimes for new physics with significant precision and highlighting the benefits of optimized lepton isolation for boosted object reconstruction.

Louise Beriet, Matteo Defranchis, Birgit Stapf, Michele Selvaggi2026-03-31
⚛️ high-energy experiments

Semiautomatic dimensional screening of plastic scintillator cubes using image analysis and robotics

The authors developed and validated a semiautomatic system combining robotics, high-resolution imaging, and image analysis to efficiently screen 1 cm³ plastic scintillator cubes for future neutrino detectors, achieving 10 μm precision, over 80% consistency with manual screening, and a 3.1% rejection rate.

Tatsuya Kikawa, Mao Tani, Atsuko K. Ichikawa, Tsunayuki Matsubara, Tsuyoshi Nakaya, Tomohisa Ogawa2026-03-31
⚛️ high-energy experiments

Pushing the Limits of Pulse Shape Discrimination in a Large Liquid Xenon Detector

This paper presents an optimized analysis framework for Pulse Shape Discrimination (PSD) in the LUX-ZEPLIN (LZ) experiment that, when combined with charge-to-light measurements into a two-factor discrimination method, significantly reduces electronic recoil background leakage and false positive rates in the search for dark matter.

D. S. Akerib, A. K. Al Musalhi, F. Alder, B. J. Almquist, C. S. Amarasinghe, A. Ames, T. J. Anderson, N. Angelides, H. M (…)2026-03-31
⚛️ nuclear experiments

Isolation of photon-nuclear interaction backgrounds in the search for the chiral magnetic effect in relativistic heavy-ion collisions

This study quantitatively assesses the contribution of coherent photon-nuclear interactions, driven by strong electromagnetic fields in relativistic heavy-ion collisions, as a distinct background source that mimics chiral magnetic effect signals to improve the precision of separating genuine CME signals from background noise.

Jing Gu, Jinhui Chen, Jie Zhao2026-03-31
⚛️ high-energy experiments

Construction and characterization of a muon trigger detector for the PSI muEDM experiment

This paper presents the design, construction, and beam test results of the Muon Trigger Detector (MTD) for the PSI muEDM experiment, demonstrating through experimental data and Geant4 simulations that the system successfully identifies storable muons to enable a sensitivity improvement of over three orders of magnitude in the muon electric dipole moment measurement.

Guan Ming Wong, Tianqi Hu, Samip Basnet, Chavdar Dutsov, Siew Yan Hoh, David Höhl, Xingyun Huang, Timothy David Hume, Al (…)2026-03-31
⚛️ nuclear experiments

Magnetic moments of open bottom--charm molecular pentaquark octets

This paper presents a comprehensive theoretical calculation of the magnetic moments for open heavy-flavor (bcˉb\bar{c} and cbˉc\bar{b}) molecular pentaquark octets within a constituent quark model, revealing distinct electromagnetic signatures that differentiate between symmetric and antisymmetric light-diquark configurations and provide crucial benchmarks for identifying these states in future experiments.

Halil Mutuk, Xian-Wei Kang2026-03-31
⚛️ high-energy experiments

Measurement of CP asymmetries in B‾0→Ds−D+\kern 0.18em\overline{\kern -0.18em B}^0 \to D_s^- D^+ and B‾s0→Ds+D−\kern 0.18em\overline{\kern -0.18em B}_s^0 \to D_s^+ D^- decays

Using 9 fb−1^{-1} of proton-proton collision data from the LHCb experiment, this paper presents the first measurement of the CP asymmetry in B‾s0→Ds+D−\kern 0.18em\overline{\kern -0.18em B}_s^0 \to D_s^+ D^- decays and the most precise measurement to date for B‾0→Ds−D+\kern 0.18em\overline{\kern -0.18em B}^0 \to D_s^- D^+ decays, with both results being consistent with CP symmetry.

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. Adefisoye, B. A (…)2026-03-31
⚛️ high-energy experiments

Observation of Λc+→nπ+η\Lambda^+_c\to n\pi^+\eta and search for Λc+→na0(980)+\Lambda^+_c\to na_0(980)^+

Using 6.1 fb−1^{-1} of data from the BESIII detector, this study reports the first observation of the decay Λc+→nπ+η\Lambda_c^+\to n\pi^+\eta with a significance of 9.5σ9.5\sigma, measures its branching fraction relative to Λc+→Λπ+η\Lambda_c^+\to \Lambda\pi^+\eta, and sets an upper limit on the intermediate process Λc+→na0(980)+\Lambda_c^+\to na_0(980)^+ while employing a Transformer-based deep learning approach for background suppression.

BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai, C. S. Akondi, R. Aliberti, A. Amoroso, Q. An, Y. (…)2026-03-31