Title: | Measurement of the Z / γ <sup>∗</sup> → ττ cross section in pp collisions at √s=13TeV and validation of τ lepton analysis techniques |
Authors: | Sirunyan, AM Tumasyan, A Adam, W Ambrogi, F Asilar, E Bergauer, T Brandstetter, J Brondolin, E Dragicevic, M Erö, J Del Valle, AE Flechl, M Friedl, M Frühwirth, R Ghete, VM Grossmann, J Hrubec, J Jeitler, M König, A Krammer, N Krätschmer, I Liko, D Madlener, T Mikulec, I Pree, E Rad, N Rohringer, H Schieck, J Schöfbeck, R Spanring, M Spitzbart, D Taurok, A Waltenberger, W Wittmann, J Wulz, CE Zarucki, M Chekhovsky, V Mossolov, V Gonzalez, JS De Wolf, EA Di Croce, D Janssen, X Lauwers, J Van De Klundert, M Van Haevermaet, H Van Mechelen, P Van Remortel, N Zeid, SA Blekman, F D Hondt, J De Bruyn, I De Clercq, J Deroover, K Flouris, G Lontkovskyi, D Lowette, S Marchesini, I Moortgat, S Moreels, L Python, Q Skovpen, K Tavernier, S Van Doninck, W Van Mulders, P Van Parijs, I Beghin, D Bilin, B Brun, H Clerbaux, B De Lentdecker, G Delannoy, H Dorney, B Fasanella, G Favart, L Goldouzian, R Grebenyuk, A Kalsi, AK Lenzi, T Luetic, J Maerschalk, T Marinov, A Seva, T Starling, E Velde, CV Vanlaer, P Vannerom, D Yonamine, R Zenoni, F Cornelis, T Dobur, D Fagot, A Gul, M Khvastunov, I Poyraz, D Roskas, C Salva, S Trocino, D Tytgat, M Verbeke, W Zaganidis, N |
Issue Date: | 3-Sep-2018 |
Publisher: | Springer Verlag |
Citation: | European Physical Journal C, 2018, 78 (9) |
Abstract: | A measurement is presented of the Z / γ ∗ → ττ cross section in pp collisions at s=13TeV, using data recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 2.3fb-1. The product of the inclusive cross section and branching fraction is measured to be σ(pp→Z/γ∗+X)B(Z/γ∗→ττ)=1848±12(stat)±67(syst \,+\,lumi) pb, in agreement with the standard model expectation, computed at next-to-next-to-leading order accuracy in perturbative quantum chromodynamics. The measurement is used to validate new analysis techniques relevant for future measurements of τ lepton production. The measurement also provides the reconstruction efficiency and energy scale for τ decays to hadrons+ντ final states, determined with respective relative uncertainties of 2.2 and 0.9%. |
URI: | http://bura.brunel.ac.uk/handle/2438/18204 |
DOI: | http://dx.doi.org/10.1140/epjc/s10052-018-6146-9 |
ISSN: | 1434-6044 http://dx.doi.org/10.1140/epjc/s10052-018-6146-9 1434-6052 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers
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