2025/11/26 by ATLAS Collaboration
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Particle Detector Development and Performance #Particle physics theoretical and experimental studies
paper · doi:10.48550/arxiv.2511.21911
openalex publication_date 2025/11/26 · openalex created_date 2025/12/03 · openalex updated_date 2026/07/28
A search for Standard Model (SM) Higgs bosons produced via vector-boson fusion at the Large Hadron Collider and decaying into a charm quark-antiquark pair (H→ cc) is presented. The datasets used correspond to integrated luminosities of 37.5 fb-1 and 51.5 fb-1 and were collected by the ATLAS detector from proton-proton collisions at √(s)=13 and 13.6 TeV, respectively. The observed (expected) upper limit on the H→ cc production cross-section times branching ratio is 41 (28) times the SM prediction at 95% confidence level. Combining this search with the previous H→ cc search in associated production with a W or Z boson yields an observed (expected) limit on the Higgs-charm Yukawa coupling modifier of |κc| < 4.7 (3.9). Higgs bosons decaying into a bottom quark-antiquark pair (H→ bb) are measured simultaneously using the 51.5 fb-1 dataset at √(s)=13.6 TeV, with an observed signal strength of 0.97+0.57-0.50 relative to the SM expectation. When combined with previous H→ bb results at 13 TeV, the observed (expected) significance reaches 3.2 (3.6) standard deviations, providing evidence for H→ bb events from vector-boson fusion.