A measurement is presented of the Z/∗→ cross section in pp collisions at √s = 13 TeV, using data recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 2.3 fb−1 . The product of the inclusive cross section and branching fraction is measured to be (pp→Z/∗+X)Br(Z/∗→) = 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 lepton production. The measurement also provides the reconstruction efficiency and energy scale for decays to hadrons + _ final states, determined with respective relative uncertainties of 2.2 and 0.9%.

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

Ravera, F.;Meridiani, P.;Amapane, N.;Argiro, S.;Bellan, R.;Costa, M.;Covarelli, R.;Kiani, B.;Migliore, E.;Monaco, V.;Monteil, E.;Obertino, M. M.;Pacher, L.;Romero, A.;Sacchi, R.;Sola, V.;Solano, A.;Rumerio, P.;
2018-01-01

Abstract

A measurement is presented of the Z/∗→ cross section in pp collisions at √s = 13 TeV, using data recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 2.3 fb−1 . The product of the inclusive cross section and branching fraction is measured to be (pp→Z/∗+X)Br(Z/∗→) = 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 lepton production. The measurement also provides the reconstruction efficiency and energy scale for decays to hadrons + _ final states, determined with respective relative uncertainties of 2.2 and 0.9%.
2018
78
9
708
749
http://link.springer-ny.com/link/service/journals/10052/index.htm
Engineering (miscellaneous); Physics and Astronomy (miscellaneous)
Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Del Valle, A....espandi
File in questo prodotto:
File Dimensione Formato  
Sirunyan2018_Article_MeasurementOfTheMathrmZGammaRi.pdf

Accesso aperto

Tipo di file: PDF EDITORIALE
Dimensione 2.12 MB
Formato Adobe PDF
2.12 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1692967
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 10
social impact