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The Galactic plane, harboring a diffuse neutrino flux, is a particularlyinteresting target to study potential cosmic-ray acceleration sites. Recentgamma-ray observations by HAWC and LHAASO have presented evidence for multipleGalactic sources that exhibit a spatially extended morphology and have energyspectra continuing beyond 100 TeV. A fraction of such emission could beproduced by interactions of accelerated hadronic cosmic rays, resulting in anexcess of high-energy neutrinos clustered near these regions. Using 10 years ofIceCube data comprising track-like events that originate from charged-currentmuon neutrino interactions, we perform a dedicated search for extended neutrinosources in the Galaxy. We find no evidence for time-integrated neutrinoemission from the potential extended sources studied in the Galactic plane. Themost significant location, at 2.6$\sigma$ post-trials, is a 1.7$^\circ$ sizedregion coincident with the unidentified TeV gamma-ray source 3HWC J1951+266. Weprovide strong constraints on hadronic emission from several regions in theGalaxy.

Search for Extended Sources of Neutrino Emission in the Galactic Plane with IceCube