⚛️ Category

hep-ex

1442 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.

Combination and interpretation of differential Higgs boson production cross sections in proton-proton collisions at s\sqrt{s} = 13 TeV

This paper presents a combined analysis of differential Higgs boson production cross sections across four decay channels (γγ\gamma\gamma, ZZ(∗)^{(*)}, WW(∗)^{(*)}, and ττ\tau\tau) using 138 fb−1^{-1} of 13 TeV proton-proton collision data from the CMS detector, yielding a total production cross section consistent with Standard Model predictions and providing constraints on Higgs couplings within the κ\kappa-framework and effective field theory.

CMS Collaboration2026-04-30⚛️ hep-ex

Performance Characterization of a Plastic-Scintillator Sensor for Fast-Neutron, Thermal-Neutron, and Gamma-Ray Discrimination

This paper demonstrates that a compact plastic-scintillator sensor coupled with a thermal-neutron screen and a single photomultiplier tube can effectively discriminate between fast neutrons, thermal neutrons, and gamma rays in mixed radiation fields, with specific configurations achieving high separation figures of merit.

Yuhang Liu, Fengpeng An, Guang Luo, Wei Wang, Xuesong Zhang, Dixiao Lu, Xiaohao Yin2026-04-30⚛️ hep-ex

Molecular states J/ψBc+J/\psi B_{c}^{+} and ηcBc∗+\eta_{c}B_{c}^{\ast +}

This paper investigates the hadronic molecule J/ψBc+J/\psi B_{c}^{+} using QCD sum rules, predicting its mass to be (9740±70)(9740 \pm 70) MeV and its total width to be (121±17)(121 \pm 17) MeV, which indicates that the state decays strongly into ordinary mesons via dominant fall-apart and subdominant annihilation mechanisms.

S. S. Agaev, K. Azizi, H. Sundu2026-04-30⚛️ hep-lat

EFT Pathways to ∣ΔB∣=2|\Delta B| =2: Chiral Constructions and Phenomenology

This paper establishes a systematic effective field theory framework using chiral symmetry to connect ultraviolet ∣ΔB∣=2|\Delta B|=2 interactions to low-energy hadronic observables, demonstrating that while baryon-antibaryon oscillations probe a limited subset of operators, dinucleon decay offers a broader sensitivity to previously unexplored channels and parameter space.

Arnau Bas i Beneito, Ajdin Palavrić, Andrea Sainaghi2026-04-30⚛️ hep-ph

Normalizing flows for density estimation in multi-detector gravitational-wave searches

This paper demonstrates that replacing PyCBC's traditional binned histogram-based density estimators with normalizing flows significantly reduces storage requirements by over three orders of magnitude while maintaining or improving the sensitivity of multi-detector gravitational-wave searches, thereby enabling scalable analysis for future detector networks.

Sam Insley, Michael J. Williams, Rahul Dhurkunde, Ian Harry2026-04-30⚛️ hep-ex

First evidence of the decay B+→π+e+e−B^+\to\pi^+ e^+ e^-

Using 9 fb−1^{-1} of proton-proton collision data from the LHCb experiment, researchers report the first evidence of the rare decay B+→π+e+e−B^+\to\pi^+ e^+ e^- with a significance of 3.2σ\sigma and a measured branching fraction consistent with Standard Model predictions.

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. Adefisoye, B. Adeva, M. Adinolfi, P. Adlarson, C. Agapopoulou, C. A. Aidala, Z. Ajaltouni, S. A (…)2026-04-30⚛️ hep-ex

Flavour changing charged current decays at LHCb

This paper presents three recent LHCb results on flavor-changing charged current decays: the first measurement of the branching fraction ratio R(D∗∗)\mathcal{R}(D^{**}) using B−→D∗∗0τ−νˉτB^{-} \to D^{**0} \tau^{-} \bar{\nu}_{\tau}, the determination of the branching fraction for Λ→pμ−νˉμ\Lambda \to p \mu^{-} \bar{\nu}_{\mu}, and the extraction of form-factor parameters from B0→D∗−μ+νμB^0 \to D^{*-} \mu^{+} \nu_{\mu} decays.

Davide Fazzini2026-04-30⚛️ hep-ex

Characterization of field cage and cathode for low radioactivity operation with the CYGNO experiment

This paper presents the validation of low-radioactivity internal components for the CYGNO experiment's directional TPC detector, demonstrating that a Nylon support structure with copper-deposited PET or Kapton sheets optimizes electrical performance while minimizing material contamination.

F. D. Amaro, R. Antonietti, E. Baracchini, L. Benussi, S. Bianco, A. Biondi, C. Capoccia, M. Caponero, L. G. M. de Carvalho, G. Cavoto, I. A. Costa, A. Croce, M. D'Astolfo, G. D'Imperio, E. Danè, G. D (…)2026-04-29⚛️ hep-ex