{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.169182.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/3132411"}},{"@id":"https://doi.org/10.1007/JHEP07(2026)054","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CMS Collaboration"},"creator":{"@type":"Organization","name":"CMS Collaboration"},"datePublished":"2026","description":"The jet mass of W bosons decaying to a quark-antiquark pair is measured in W+jets events  from proton-proton collisions at a center-of-mass energy of 13 TeV. The data used were collected by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 138 fb$^{-1}$. Hadronic decays of W bosons with high momenta produce strongly collimated decay products due to the large Lorentz boost, and are reconstructed as single large-radius jets. These jets have a characteristic substructure that is exploited to distinguish them from the large background of quark- and gluon-initiated jets. The jet mass is computed using the soft-drop algorithm, which suppresses soft wide-angle radiation that leads to a broadening of the jet mass distribution. For the first time, unfolded measurements are presented of the double-differential W+jets cross section as a function of the jet transverse momentum and soft-drop mass.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.169182.v1/t1","@type":"Dataset","description":"Jet mass, N$_2$&lt;0.2, 650&lt;p$_{T}$&lt;800 GeV. Unfolded and background subtracted jet mass distribution at the particle level. The fiducial measurement region...","name":"Figure 7 - Jet mass (N$_2$<0.2, 650<p$_{T}$<800)"},{"@id":"https://doi.org/10.17182/hepdata.169182.v1/t2","@type":"Dataset","description":"Jet mass, N$_2$&lt;0.2, 800&lt;p$_{T}$&lt;1200 GeV. 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