{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.157845.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2860619"}},{"@id":"https://doi.org/10.1007/JHEP05(2025)038","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2025","description":"A measurement of the ratio of the branching fractions, $R_{\\tau/e} = B(W \\to \\tau \\nu)/ B(W \\to e \\nu)$, is performed using a sample of $W$ bosons originating from top-quark decays to final states containing $\\tau$-leptons or electrons. This measurement uses $pp$ collisions at $\\sqrt{s}=13$ TeV, collected by the ATLAS experiment at the Large Hadron Collider during Run 2, corresponding to an integrated luminosity of 140 fb$^{-1}$. The $W \\to \\tau \\nu_\\tau$ (with $\\tau \\to e \\nu_e \\nu_\\tau$) and $W \\to e \\nu_e$ decays are distinguished using the differences in the impact parameter distributions and transverse momentum spectra of the electrons. The measured ratio of branching fractions $R_{\\tau/e} = 0.975 \\pm 0.012 \\textrm{(stat.)} \\pm 0.020 \\textrm{(syst.)}$, is consistent with the Standard Model assumption of lepton flavour universality in $W$-boson decays.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.157845.v1/t1","@type":"Dataset","description":"All the entries of this HEP data record are listed. Figure and Table numbers are the same as in the...","name":"Table of Contents"},{"@id":"https://doi.org/10.17182/hepdata.157845.v1/t2","@type":"Dataset","description":"Number of events in the $\\mu e$ channel from different sources, as estimated by the fit to the data, compared...","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.157845.v1/t3","@type":"Dataset","description":"Number of events in the $e e$ channel from different sources, as estimated by the fit to the data, compared...","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.157845.v1/t4","@type":"Dataset","description":"Measured values of $R(\\tau/e)$ in the different $p_T$ bins. The first row gives the main inclusive measurement of $R(\\tau/e)$.","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.157845.v1/t5","@type":"Dataset","description":"Breakdown of systematic uncertainties in the fit to data. Different individual components used in the fit are combined into categories....","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.157845.v1/t6","@type":"Dataset","description":"Distributions of $|d_0|$ for the $\\mu e$ channel of the nominal sample in $7 < p_T < 10$ GeV bin....","name":"Figure 6(a)"},{"@id":"https://doi.org/10.17182/hepdata.157845.v1/t7","@type":"Dataset","description":"Distributions of $|d_0|$ for the $\\mu e$ channel of the nominal sample in $10 < p_T < 20$ GeV bin....","name":"Figure 6(b)"},{"@id":"https://doi.org/10.17182/hepdata.157845.v1/t8","@type":"Dataset","description":"Distributions of $|d_0|$ for the $\\mu e$ channel of the nominal sample in $20 < p_T < 250$ GeV bin....","name":"Figure 6(c)"},{"@id":"https://doi.org/10.17182/hepdata.157845.v1/t9","@type":"Dataset","description":"Distributions of $|d_0|$ for the $e e$ channel of the nominal sample in $5 < p_T < 10$ GeV bin....","name":"Figure 7(a)"},{"@id":"https://doi.org/10.17182/hepdata.157845.v1/t10","@type":"Dataset","description":"Distributions of $|d_0|$ for the $e e$ channel of the nominal sample in $10 < p_T < 20$ GeV bin....","name":"Figure 7(b)"},{"@id":"https://doi.org/10.17182/hepdata.157845.v1/t11","@type":"Dataset","description":"Distributions of $|d_0|$ for the $e e$ channel of the nominal sample in $20 < p_T < 250$ GeV bin....","name":"Figure 7(c)"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2860619?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/157845"}],"inLanguage":"en","name":"Test of lepton flavour universality in $W$-boson decays into electrons and $\\tau$-leptons using $pp$ collisions at $\\sqrt{s}=13$ TeV with the ATLAS detector","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2860619?version=1","version":1}