Apr 19 – 21, 2017
Trieste - Italia
Europe/Rome timezone
Proceedings: Il Nuovo Cimento C, Vol. 41, N. 1-2, 2018 : https://www.sif.it/riviste/sif/ncc/econtents/2018/041/01-02

Search for narrow resonances in dilepton mass spectra in p-p collisions at sqrt(s) = 13 TeV and combination with 8 TeV data

Apr 20, 2017, 6:10 PM
Aula Magna - Edificio H3 (Trieste - Italia)

Aula Magna - Edificio H3

Trieste - Italia

Università degli Studi di Trieste Via Valerio nº 12/2 I-34127 Trieste (TS)
Oral contribution Sessione Frontiera Energia Sessione Frontiera Energia


Filippo Errico (BA)


any well established models extending beyond Standard Model (e.g. Grand Unified Theory, Sequential Standard Model or models proposing extra spatial dimension(s)) predict the existence of new heavy neutral bosons that would decay in two leptons. A search for new narrow resonances, generically referred as Z', in the dielectron and dimuon decay channels has been performed using data collected by the CMS experiment in 2016 from proton - proton collisions at a center of mass energy of sqrt(s) = 13 TeV (corresponding to an integrated luminosity of 13 fb-1) and combining 2015 13 TeV data (corresponding a luminosity of 2.9 fb-1) with a previous analysed set of data obtained at sqrt(s) = 8 TeV (corresponding a luminosity of 20 fb-1). In the absence of a significant deviation from the standard model predictions, 95% confidence level limits are set on the ratio of the production cross section times branching fraction for high-mass resonances to that for the Z boson. For several models, lower limits on the resonance mass are derived.

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