Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at √s=13 TeV with the ATLAS detector
A measurement of the ratio of the branching fractions, Rτ/e = B(W → τν)/B(W → eν), is performed using a sample of W bosons originating from top-quark decays to final states containing τ-leptons or electrons. This measurement uses pp collisions at √s= 13 TeV, collected by the ATLAS experiment at the...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
May 6, 2025
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| In: |
Journal of high energy physics
Year: 2025, Issue: 5, Pages: 1-48 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP05(2025)038 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1007/JHEP05(2025)038 Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1007/JHEP05(2025)038 
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| Author Notes: | the ATLAS collaboration |
MARC
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| 245 | 1 | 0 | |a Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at √s=13 TeV with the ATLAS detector |c the ATLAS collaboration |
| 246 | 3 | 0 | |a sqrt τ |
| 246 | 3 | 3 | |a Test of lepton flavour universality in W-boson decays into electrons and tau -leptons using pp collisions at square root s = 13 TeV with the ATLAS detector |
| 264 | 1 | |c May 6, 2025 | |
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| 500 | |a The ATLAS Collaboration: G. Aad, A. Ackermann, L.M. Baltes, F. Bartels, S.J. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, L. Sanfilippo, A. Schoening, H.-C. Schultz-Coulon, V. Sothilingam, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, J. Zinsser und weitere 2899 | ||
| 500 | |a Gesehen am 19.01.2026 | ||
| 520 | |a A measurement of the ratio of the branching fractions, Rτ/e = B(W → τν)/B(W → eν), is performed using a sample of W bosons originating from top-quark decays to final states containing τ-leptons or electrons. This measurement uses pp collisions at √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 → τντ (with τ → eνeντ) and W → eνe decays are distinguished using the differences in the impact parameter distributions and transverse momentum spectra of the electrons. The measured ratio of branching fractions Rτ/e = 0.975 ± 0.012 (stat.) ± 0.020 (syst.), is consistent with the Standard Model assumption of lepton flavour universality in W-boson decays. | ||
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