@article{b66ee14d5fe34fbaab222d2a2033f6ac,
title = "Measurement of the τ lepton polarization in Z boson decays in proton-proton collisions at (Formula presented.)",
abstract = "The polarization of τ leptons is measured using leptonic and hadronic τ lepton decays in Z → τ+ τ− events in proton-proton collisions at (Formula presented.) recorded by CMS at the CERN LHC with an integrated luminosity of 36.3 fb−1. The measured τ− lepton polarization at the Z boson mass pole is Pτ(Z) = −0.144 ± 0.006 (stat) ± 0.014 (syst) = −0.144 ± 0.015, in good agreement with the measurement of the τ lepton asymmetry parameter of Aτ = 0.1439 ± 0.0043 = − Pτ(Z) at LEP. The τ lepton polarization depends on the ratio of the vector to axial-vector couplings of the τ leptons in the neutral current expression, and thus on the effective weak mixing angle sin2 θWeff , independently of the Z boson production mechanism. The obtained value sin2 θWeff = 0.2319 ± 0.0008(stat) ± 0.0018(syst) = 0.2319 ± 0.0019 is in good agreement with measurements at e+ e− colliders. [Figure not available: see fulltext.].",
keywords = "Hadron-Hadron Scattering, Tau Physics",
author = "{The CMS collaboration
[email protected]} and A. Hayrapetyan and A. Tumasyan and W. Adam and Andrejkovic, {J. W.} and T. Bergauer and S. Chatterjee and K. Damanakis and M. Dragicevic and {Escalante Del Valle}, A. and Hussain, {P. S.} and M. Jeitler and N. Krammer and D. Liko and I. Mikulec and J. Schieck and R. Sch{\"o}fbeck and D. Schwarz and M. Sonawane and S. Templ and W. Waltenberger and Wulz, {C. E.} and Darwish, {M. R.} and T. Janssen and {Van Mechelen}, P. and Bols, {E. S.} and J. D{\textquoteright}Hondt and S. Dansana and {De Moor}, A. and M. Delcourt and {El Faham}, H. and S. Lowette and I. Makarenko and D. M{\"u}ller and Sahasransu, {A. R.} and S. Tavernier and M. Tytgat and {Van Putte}, S. and D. Vannerom and B. Clerbaux and {De Lentdecker}, G. and L. Favart and D. Hohov and J. Jaramillo and A. Khalilzadeh and K. Lee and M. Mahdavikhorrami and A. Malara and S. Paredes and L. P{\'e}tr{\'e} and W. Lin",
note = "Publisher Copyright: {\textcopyright} 2024, The Author(s).",
year = "2024",
month = jan,
doi = "10.1007/JHEP01(2024)101",
language = "???core.languages.en_GB???",
volume = "2024",
journal = "Journal of High Energy Physics",
issn = "1126-6708",
number = "1",
}