1434 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.
Using LHCb proton-proton collision data, this paper presents the first observation of the rare baryonic decay with a significance exceeding seven standard deviations, while measuring its branching fraction to be and its weak decay parameter to be , which indicates comparable S-wave and P-wave decay amplitudes.
This paper investigates the properties of the Roper resonance and nucleon-to-Roper electromagnetic transition amplitudes by analyzing quark degrees of freedom at high momentum transfer and incorporating baryon-meson contributions to explain low-to-intermediate momentum transfer data.
This paper investigates the detection of loosely bound composite dark matter that disassembles into cascades of constituents while traversing the Earth, proposing unique underground signatures such as non-collinear multiple scatters, time-separated events, and coincident signals across different laboratories.
This study utilizes the Jet AA Microscopic Transport Model to demonstrate that -clustering in nuclei enhances geometric compactness and radial observables like proton mean transverse momentum, as well as flow magnitudes at high participant numbers, thereby offering complementary probes for investigating nuclear structure in low-energy collisions at CSR and HIAF energies.
This paper presents the first absolute normalization measurements of B meson production fraction ratios (, , and ) as functions of transverse momentum and rapidity in proton-proton collisions at TeV, utilizing a high-statistics 2018 CMS dataset with both open-charm and charmonium decay channels to improve branching fraction ratios and confirm isospin invariance.
This paper presents the recently completed calculations of three-loop unpolarized and polarized massive operator matrix elements and asymptotic Wilson coefficients for deep-inelastic scattering, while also providing efficient numerical representations of massless coefficients, splitting functions, and target-mass corrections to support QCD fitting.
This paper proposes that a small fraction of the Large Hadron Collider's unidentified falling objects (UFOs) may be caused by antimatter axion quark nuggets (a macroscopic dark matter candidate) generating acoustic waves, suggesting the LHC could function as a broadband detector to confirm this signal through correlated event analysis.
This paper employs QCD light-cone sum rules to calculate the static electromagnetic properties of three charm-strange molecular tetraquark candidates, revealing that their magnetic moments are dominated by light quarks and providing quantitative benchmarks to distinguish molecular structures from compact multiquark interpretations.
This paper presents the first observation of significant transverse momentum and pseudorapidity dependent flow vector fluctuations in p$-$Pb collisions at TeV, confirming collective flow in small collision systems and providing critical constraints for theoretical models of initial geometry.
This paper presents the first measurements of inclusive and multiplicity-dependent pseudorapidity densities of charged particles in proton-proton collisions at the record center-of-mass energy of TeV, revealing that particle production in high-multiplicity events follows a power-law scaling with energy and establishing a new reference for LHC physics.