⚛️ Category

hep-ex

2503 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.

⚛️ nuclear experiments

Possible solution to the gallium anomaly moving beyond the leptonic wave function factorization

This paper proposes that the long-standing gallium anomaly—a significant deficit in neutrino capture rates on 71^{71}Ga—may be resolved by revising the theoretical cross-section calculation to move beyond standard leptonic wave function factorization and instead incorporate phenomenologically constrained Gamow-Teller transition densities that correctly reproduce the 71^{71}Ge half-life, thereby eliminating the need for new physics explanations.

M. Cadeddu, N. Cargioli, F. Dordei, L. Ferro, C. Giunti, M. Pitzalis2026-10-01
⚛️ nuclear experiments

Measurement of the 39^{39}Ar specific activity in atmospheric argon with DArT at the Canfranc Underground Laboratory

Using the DArT detector at the Canfranc Underground Laboratory, researchers measured the specific activity of 39^{39}Ar in atmospheric argon to be 0.955±0.008 Bq/kg0.955 \pm 0.008~\text{Bq}/\text{kg}, establishing the most precise determination to date and validating the detector for future dark matter experiments.

P. Agnes, H. O. Back, S. Bharat, W. M. Bonivento, M. Boulay, M. Caboni, N. Canci, N. Cargioli, P. Castello, S. Cebrián (…)2026-10-01
⚛️ phenomenology

Central exclusive production of η\eta and η′\eta' mesons in diffractive proton-proton collisions at the LHC

This paper utilizes the tensor-pomeron approach, constrained by WA102 data, to predict the central exclusive production cross sections and differential distributions of η\eta and η′\eta' mesons in proton-proton collisions at s=13\sqrt{s} = 13 TeV, demonstrating the feasibility of using these processes to probe the nature of the pomeron at the LHC.

Piotr Lebiedowicz, Otto Nachtmann, Antoni Szczurek2026-10-01
⚛️ nuclear experiments

Probing jet quenching via the correlation of groomed jet substructure observables in Pb$-$Pb and pp collisions

This ALICE collaboration study reports the first measurement of the correlation between the Soft Drop grooming splitting angle and momentum-sharing fraction in 5 TeV Pb-Pb and pp collisions, revealing that jets in heavy-ion collisions are narrower and potentially less balanced at large opening angles, a phenomenon best described by models incorporating elastic scatterings like the HYBRID model.

ALICE Collaboration2026-10-01
⚛️ phenomenology

Exclusive production of π+π−\pi^+ \pi^- pairs in diffractive γp\gamma p and in $pp$ collisions within the tensor-pomeron approach

This paper employs the tensor-pomeron approach to model the exclusive production of π+π−\pi^+ \pi^- pairs in diffractive γp\gamma p and $pp$ collisions, successfully describing H1 data for the γp\gamma p reaction while predicting differential cross sections for $pp$ collisions at 13 TeV to guide future LHC and electron-ion collider measurements.

Piotr Lebiedowicz, Otto Nachtmann, Antoni Szczurek2026-10-01
⚛️ high-energy experiments

Measurement of the triple-differential cross section of Z+jet production in proton-proton collisions at s\sqrt{s} = 13 TeV

Using 138 fb−1^{-1} of proton-proton collision data at s\sqrt{s} = 13 TeV collected by the CMS experiment, this paper presents a triple-differential measurement of the Z+jet production cross section that is unfolded for detector effects and compared with next-to-next-to-leading order QCD predictions to characterize the proton's partonic structure and determine the strong coupling.

CMS Collaboration2026-10-01
⚛️ high-energy experiments

Measurement of prompt and non-prompt D∗+{\rm D}^{\rm *+}-meson spin alignment in pp collisions at s\sqrt{s} = 13.6 TeV$

Using ALICE data from proton-proton collisions at 13.6 TeV, this study presents a precise measurement of D∗+{\rm D}^{\rm *+}-meson spin alignment, revealing that prompt mesons are unpolarized while non-prompt mesons exhibit a deviation consistent with weak beauty-hadron decays, thereby establishing a crucial baseline for future heavy-ion collision studies.

ALICE Collaboration2026-10-01