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

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at = 13 TeV with the ATLAS detector. / Ali, Hanadi; Alsolami, Zainab; Barton, A.E. et al.
In: Journal of High Energy Physics, Vol. 2025, No. 5, 38, 31.05.2025.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Ali, H, Alsolami, Z, Barton, AE, Borissov, G, Bouhova-Thacker, EV, Ferguson, R, Ferrando, J, Fox, H, Hagan, A, Henderson, RCW, Jones, RWL, Kartvelishvili, V, Love, PA, Marshall, EJ, McElhinney, L, Meng, L, Muenstermann, D, Sampson, E, Smizanska, M & Wharton, AM 2025, 'Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at = 13 TeV with the ATLAS detector', Journal of High Energy Physics, vol. 2025, no. 5, 38. https://doi.org/10.1007/jhep05(2025)038

APA

Ali, H., Alsolami, Z., Barton, A. E., Borissov, G., Bouhova-Thacker, E. V., Ferguson, R., Ferrando, J., Fox, H., Hagan, A., Henderson, R. C. W., Jones, R. W. L., Kartvelishvili, V., Love, P. A., Marshall, E. J., McElhinney, L., Meng, L., Muenstermann, D., Sampson, E., Smizanska, M., & Wharton, A. M. (2025). Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at = 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2025(5), Article 38. https://doi.org/10.1007/jhep05(2025)038

Vancouver

Ali H, Alsolami Z, Barton AE, Borissov G, Bouhova-Thacker EV, Ferguson R et al. Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at = 13 TeV with the ATLAS detector. Journal of High Energy Physics. 2025 May 31;2025(5):38. Epub 2025 May 6. doi: 10.1007/jhep05(2025)038

Author

Ali, Hanadi ; Alsolami, Zainab ; Barton, A.E. et al. / Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at = 13 TeV with the ATLAS detector. In: Journal of High Energy Physics. 2025 ; Vol. 2025, No. 5.

Bibtex

@article{337d68dba3d34d589e21cd6ad3d0b0a2,
title = "Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at = 13 TeV with the ATLAS detector",
abstract = "A measurement of the ratio of the branching fractions, R{\"I}„/e = B(W {\^a}†{\textquoteright} {\"I}„{\^I}½)/B(W {\^a}†{\textquoteright} e{\^I}½), is performed using a sample of W bosons originating from top-quark decays to final states containing {\"I}„-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{\^a}ˆ{\textquoteright}1. The W {\^a}†{\textquoteright} {\"I}„{\^I}½{\"I}„ (with {\"I}„ {\^a}†{\textquoteright} e{\^I}½e{\^I}½{\"I}„) and W {\^a}†{\textquoteright} e{\^I}½e 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{\"I}„/e = 0.975 {\^A}± 0.012 (stat.) {\^A}± 0.020 (syst.), is consistent with the Standard Model assumption of lepton flavour universality in W-boson decays.",
keywords = "Flavour Physics, Tau Physics, Hadron-Hadron Scattering",
author = "Hanadi Ali and Zainab Alsolami and A.E. Barton and G. Borissov and E.V. Bouhova-Thacker and Ruby Ferguson and James Ferrando and H. Fox and Alina Hagan and R.C.W. Henderson and R.W.L. Jones and V. Kartvelishvili and P.A. Love and Marshall, {Emma J.} and Luke McElhinney and L. Meng and D. Muenstermann and Elliot Sampson and M. Smizanska and A.M. Wharton",
year = "2025",
month = may,
day = "31",
doi = "10.1007/jhep05(2025)038",
language = "English",
volume = "2025",
journal = "Journal of High Energy Physics",
issn = "1029-8479",
publisher = "Springer-Verlag",
number = "5",

}

RIS

TY - JOUR

T1 - Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at = 13 TeV with the ATLAS detector

AU - Ali, Hanadi

AU - Alsolami, Zainab

AU - Barton, A.E.

AU - Borissov, G.

AU - Bouhova-Thacker, E.V.

AU - Ferguson, Ruby

AU - Ferrando, James

AU - Fox, H.

AU - Hagan, Alina

AU - Henderson, R.C.W.

AU - Jones, R.W.L.

AU - Kartvelishvili, V.

AU - Love, P.A.

AU - Marshall, Emma J.

AU - McElhinney, Luke

AU - Meng, L.

AU - Muenstermann, D.

AU - Sampson, Elliot

AU - Smizanska, M.

AU - Wharton, A.M.

PY - 2025/5/31

Y1 - 2025/5/31

N2 - 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.

AB - 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.

KW - Flavour Physics

KW - Tau Physics

KW - Hadron-Hadron Scattering

U2 - 10.1007/jhep05(2025)038

DO - 10.1007/jhep05(2025)038

M3 - Journal article

VL - 2025

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 5

M1 - 38

ER -