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.
This study presents the first measurement of charged-particle nuclear modification factors in neon-neon collisions and systematically compares them with oxygen-oxygen, xenon-xenon, and lead-lead data to demonstrate that charged-particle suppression scales with nuclear size and is well-described by energy loss models rather than initial-state nuclear effects.
The authors demonstrate that a specific second-order -spin sum rule relating CKM-free hadronic weak charm decay rates holds within the Standard Model, is well-supported by existing data, and can be used to predict unmeasured decay rates.
This paper introduces the first application of Bayes Linear Emulation and History Matching to calibrate non-perturbative models in Monte Carlo event generators, offering a robust method to identify all data-consistent parameter regions rather than relying on traditional best-fit estimates, as demonstrated with hadronisation models in Sherpa.
This paper presents the first measurement of inclusive production at midrapidity in pp collisions at TeV using the ALICE detector, reporting the transverse-momentum differential cross section and its ratio to J/ production, which reveals a mild rise in the ratio with increasing and is compared with NRQCD and ICEM theoretical models.
This paper presents a comprehensive analysis of bottom-charmed meson states using the inverse matrix QCD sum rules formalism, which successfully reconstructs hadronic spectral densities from first principles to determine masses and decay constants that align with experimental data while offering improved numerical stability and reduced systematic uncertainties compared to standard methods.
The ALICE Collaboration reports the first measurement of the charged-particle jet transverse-momentum fraction () carried by prompt and non-prompt J/ mesons in 13 TeV proton-proton collisions, revealing that while PYTHIA 8 simulations qualitatively reproduce the data for , they significantly overestimate the fraction of isolated J/ mesons at high values, highlighting challenges in modeling the hadronization of low-momentum jets.
This paper presents ALICE measurements of W and Z boson production cross sections in pp collisions at TeV via their electronic decay channels, comparing the results with perturbative QCD calculations and reporting the first LHC observation of W production and associated hadrons as a function of charged-particle multiplicity.
This study utilizes the GiBUU framework to demonstrate that while pion final-state interactions have a moderate impact on proton decay search sensitivity in water Cherenkov detectors, the choice of Fermi momentum distribution constitutes the dominant systematic uncertainty affecting atmospheric neutrino background estimates.
This paper presents a model-agnostic tracking algorithm capable of reconstructing a broad class of smooth, non-helical particle trajectories without prior specification, thereby enabling the discovery of unexpected physics signatures that standard helix-based algorithms miss.
Using combined Belle and Belle II data, this study presents the first observation of the decay , provides evidence for , and sets an upper limit for , thereby determining their absolute branching fractions and advancing the understanding of singly Cabibbo-suppressed charm baryon decay mechanisms.