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.

New high-sensitivity search for neutron to mirror-neutron oscillations at the PSI UCN source

A high-sensitivity search for neutron-to-mirror-neutron oscillations conducted at the PSI UCN source found no evidence of anomalous neutron losses, thereby excluding 99.98% of the previously claimed parameter space and establishing new limits on the oscillation time constant.

N. J. Ayres, Z. Berezhiani, G. Bison, K. Bodek, V. Bondar, P. -J. Chiu, M. Daum, C. B. Doorenbos, S. Emmenegger, K. Kirch, V. Kletzl, J. Krempel, B. Lauss, D. Pais, I. Rienäcker, D. Ries, D. Rozpedzik (…)2026-03-04⚛️ nucl-ex

Internal Charge Amplification in Germanium at 77K and 4K: From Single-Free-Flight Bounds to a Physics-Informed Ionization Model

This paper presents a unified, physics-informed framework for predicting the critical electric field required for internal charge amplification in cryogenic germanium at 77 K and 4 K, bridging single-free-flight bounds with detailed scattering mechanisms to provide closed-form design formulas and a practical calibration workflow for optimizing detector performance.

Dongming Mei, Kunming Dong, Narayan Budhathoki, Shasika Panamaldeniya, Francisco Ponce2026-03-04⚛️ nucl-ex

Complementarity between atmospheric and super-beam neutrinos at ESSnuSB

This paper demonstrates that combining atmospheric neutrino data with the ESSnuSB super-beam program significantly enhances the precision of measuring the leptonic CP phase and resolves neutrino mass ordering degeneracies.

ESSnuSB, :, J. Aguilar, M. Anastasopoulos, D. Barčot, E. Baussan, A. K. Bhattacharyya, A. Bignami, M. Blennow, M. Bogomilov, B. Bolling, E. Bouquerel, F. Bramati, A. Branca, G. Brunetti, I. Bustinduy (…)2026-03-04⚛️ hep-ph

Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at s\sqrt{s} = 13 TeV

Using 54.4 fb1^{-1} of 13 TeV proton-proton collision data from the CMS experiment, a search for narrow resonances decaying to diphotons in the 10–70 GeV mass range found no significant excess over the expected background, leading to the setting of upper limits on production cross sections and an interpretation within an axion-like particle framework.

CMS Collaboration2026-03-04⚛️ hep-ex

Evidence of isospin-symmetry violation in high-energy collisions of atomic nuclei: Theoretical and Phenomenological considerations

This paper extends the theoretical and phenomenological analysis of recent NA61/SHINE collaboration findings by establishing the conceptual and analytical foundations of isospin symmetry and proving that, under charge-symmetry invariant initial conditions, the mean multiplicities of charged and neutral kaons should be equal, thereby highlighting the significance of the observed violation.

Wojciech Brylinski, Marek Gazdzicki, Francesco Giacosa, Mark Gorenstein, Roman Poberezhnyuk, Subhasis Samanta2026-03-03⚛️ hep-ph