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%.

Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2018). Measurement of the Z / γ∗→ ττ cross section in pp collisions at √s=13TeV and validation of τ lepton analysis techniques. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 78(9) [10.1140/epjc/s10052-018-6146-9].

Measurement of the Z / γ∗→ ττ cross section in pp collisions at √s=13TeV and validation of τ lepton analysis techniques

Dinardo M. E.;Ghezzi A.;Govoni P.;Paganoni M.;Ragazzi S.;de Fatis T. T.;Lucchini M. T.;Gerosa R.;Massironi A.;De Guio F.;
2018

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%.
Articolo in rivista - Articolo scientifico
Standard, Model;
English
2018
78
9
708
none
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2018). Measurement of the Z / γ∗→ ττ cross section in pp collisions at √s=13TeV and validation of τ lepton analysis techniques. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 78(9) [10.1140/epjc/s10052-018-6146-9].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/306703
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