⚛️ Category

hep-ex

2160 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

Probing the flavour structure of dimension-6 EFT operators in multilepton final states in proton-proton collisions at s\sqrt{s} = 13 TeV

Using 138 fb−1^{-1} of 13 TeV proton-proton collision data from the CMS experiment, this study presents the first simultaneous disentanglement of the flavour structure of dimension-6 EFT operators by probing quark-Z interactions across different generations in multilepton final states, confirming Standard Model consistency and setting limits on Wilson coefficients for both light and heavy quarks.

CMS Collaboration2026-03-23
⚛️ high-energy experiments

Search for Beyond the Standard Model physics with anomaly detection in multilepton final states in $pp$ collisions at s=13\sqrt{s}=13 TeV with the ATLAS detector

Using 140 fb−1^{-1} of ATLAS Run 2 data, this model-agnostic search for Beyond the Standard Model physics in multilepton final states employs unsupervised machine learning to identify anomalies, finding no significant excess and setting new limits on various benchmark models, including the first constraints on a flavourful vector-like lepton model.

ATLAS Collaboration2026-03-23
⚛️ high-energy experiments

Response Matrix Estimation in Unfolding Differential Cross Sections

This paper investigates the impact of response matrix estimation on differential cross-section unfolding in particle physics, demonstrating that while traditional binned counting methods can inadvertently provide regularization through noise, a proposed unbinned conditional density estimation approach offers a potentially superior alternative for handling limited Monte Carlo sample sizes.

Huanbiao Zhu, Andrea Carlo Marini, Mikael Kuusela, Larry Wasserman2026-03-23
⚛️ high-energy experiments

Vector boson scattering and anomalous quartic couplings in final states with ℓν\ell\nuqq or ℓℓ\ell\ellqq plus jets using proton-proton collisions at s\sqrt{s} = 13 TeV

Using 138 fb−1^{-1} of proton-proton collision data at 13 TeV collected by the CMS detector, this study presents a measurement of electroweak ZV (V=W, Z) boson pair production with two jets, achieving an observed significance of 1.3 standard deviations and setting world-leading constraints on anomalous quartic gauge couplings through a combination with previous WV channel results.

CMS Collaboration2026-03-23
⚛️ high-energy experiments

Determination of proton electromagnetic form factors from DVCS measurements

This paper presents a detailed analysis of proton electromagnetic form factors using exclusive photon leptoproduction data in the Beth-Heitler dominant region, demonstrating that such measurements can provide complementary constraints on the Dirac form factor and yield a charge radius consistent with recent high-precision PRad results.

The MMGPDs Collaboration, Anoushiravan Moradi, Muhammad Goharipour, H. Fatehi, K. Azizi2026-03-23
⚛️ high-energy experiments

Evidence of Higgs boson inclusive production at high transverse momentum decaying to a pair of bb-quarks with the ATLAS detector

Using 301 fb−1^{-1} of proton-proton collision data at 13 and 13.6 TeV collected by the ATLAS detector, this study reports the first evidence of Higgs boson inclusive production at high transverse momentum (pT>450p_{\text{T}} > 450 GeV) decaying to a bbˉb\bar{b} pair, achieving a 3.8σ\sigma observed significance through advanced jet identification and regression techniques.

ATLAS Collaboration2026-03-23
⚛️ nuclear theory

Global Λ\Lambda hyperon polarization in low-energy heavy ion collisions -- a scenario without vorticity

This paper proposes that the global Λ\Lambda hyperon polarization observed in low-energy heavy-ion collisions can be partially explained (accounting for ~23% of the signal) by a mechanism linking it to long-standing transverse polarization phenomena via the alignment of production and reaction planes driven by directed flow, rather than solely by quark-gluon plasma vorticity.

Feng Liu (Department of Physics and Astronomy, Stony Brook University), Zhoudunming Tu (Department of Physics and Astron (…)2026-03-23
⚛️ high-energy experiments

Analysis of Fully Heavy P(3c2b)P_{(3c2b)} and P(3b2c)P_{(3b2c)} Pentaquark Candidates

This paper employs the QCD sum rule approach with three distinct interpolating currents to predict the masses and current coupling constants of fully heavy pentaquark candidates containing three charm and two bottom quarks (3c2b3c2b) or three bottom and two charm quarks (3b2c3b2c) with spin-parity JP=12−J^P=\frac{1}{2}^{-}.

K. Azizi, Y. Sarac, H. Sundu2026-03-23