Measurement of the Z/γ* → ττ Cross Section in pp Collisions at √s = 13 TeV and Validation of τ Lepton Analysis Techniques

European Physical Journal C 2018
Viesturs Veckalns, CERN international group of authors

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%.

DOI
10.1140/epjc/s10052-018-6146-9
Hyperlink
https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-6146-9

Veckalns, V., international group of authors, C. Measurement of the Z/γ* → ττ Cross Section in pp Collisions at √s = 13 TeV and Validation of τ Lepton Analysis Techniques. European Physical Journal C, 2018, Vol. 78, No. 9, pp.1-10. ISSN 1434-6044. e-ISSN 1434-6052. Available from: doi:10.1140/epjc/s10052-018-6146-9

Publication language
English (en)