Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at root s=13 TeV with the ATLAS detector

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F25%3A00388202" target="_blank" >RIV/68407700:21220/25:00388202 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21240/25:00388202 RIV/68407700:21340/25:00388202 RIV/68407700:21670/25:00388202
Result on the web
<a href="https://doi.org/10.1007/JHEP05(2025)038" target="_blank" >https://doi.org/10.1007/JHEP05(2025)038</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP05(2025)038" target="_blank" >10.1007/JHEP05(2025)038</a>

Result language
angličtina
Original language name
Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at root s=13 TeV with the ATLAS detector
Original language description
A measurement of the ratio of the branching fractions, R-tau/e = B(W -> tau nu)/B(W -> 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 root 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 -> tau nu(tau) (with tau -> e nu(e)nu(tau)) and W -> 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 +/- 0.012 (stat.) +/- 0.020 (syst.), is consistent with the Standard Model assumption of lepton flavour universality in W-boson decays.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/EH22_008%2F0004632" target="_blank" >EH22_008/0004632: Fundamental constituents of matter through frontier technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)