@article{3aafff5b698c46a1bf10a715207dc760,
title = "Precise test of lepton flavour universality in W-boson decays into muons and electrons in pp collisions at s=13TeV with the ATLAS detector",
abstract = "The ratio of branching ratios of the W boson to muons and electrons, RWμ/e=B(W→μν)/B(W→eν), has been measured using 140fb-1 of pp collision data at s=13 TeV collected with the ATLAS detector at the LHC, probing the universality of lepton couplings. The ratio is obtained from measurements of the tt¯ production cross-section in the ee, eμ and μμ dilepton final states. To reduce systematic uncertainties, it is normalised by the square root of the corresponding ratio RZμμ/ee for the Z boson measured in inclusive Z→ee and Z→μμ events. By using the precise value of RZμμ/ee determined from e+e- colliders, the ratio RWμ/e is determined to be (Formula presented.) The three uncertainties correspond to data statistics, experimental systematics and the external measurement of RZμμ/ee, giving a total uncertainty of 0.0045, and confirming the Standard Model assumption of lepton flavour universality in W-boson decays at the 0.5% level.",
author = "{ATLAS Collaboration} and M. Atkinson and M. Barakat and K. Becker and Brown, {L. M.} and Chapman, {J. D.} and J. Chen and J. Chen and Y. Chen and K. Cranmer and Das, {S. J.} and Y. Fang and C. Feng and D. Francis and A. Haas and Han, {Y. F.} and S. Hassan and Y. He and Y. He and Y. He and Herrmann, {L. M.} and S. Huang and Johnson, {J. W.} and Kennedy, {P. D.} and Lee, {S. C.} and Lee, {S. C.} and Li, {C. Q.} and Li, {C. Q.} and J. Li and L. Li and X. Li and Liu, {E. H.L.} and X. Liu and X. Liu and Y. Liu and Y. Liu and Y. Liu and M. Losada and Lu, {Y. J.} and W. Ma and J. Martin and McDonald, {E. F.} and Mclaughlin, {D. J.} and Miller, {E. H.} and Mincer, {A. I.} and A. Mitra and Park, {T. H.} and Smith, {A. C.} and Smith, {D. R.} and S. Solomon and H. Wang and X. Wang and X. Wang and X. Wang and Y. Wang and Y. Wang and Z. Wang and Z. Wang and Z. Wang and Williams, {D. M.} and S. Williams and R. Xu and Z. Xu and Z. Xu and Y. Yang and Y. Yang and J. Zhang and J. Zhang and L. Zhang and L. Zhang and S. Zhang and S. Zhang and X. Zhang and X. Zhang and Y. Zhang and Y. Zhang and Y. Zhang",
note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",
year = "2024",
month = oct,
doi = "10.1140/epjc/s10052-024-13070-4",
language = "English (US)",
volume = "84",
journal = "European Physical Journal C",
issn = "1434-6044",
publisher = "Springer Nature",
number = "10",
}