Measurements of ZZ Production Cross Section Using Four-lepton Events and Constraints on Anomalous Triple Gauge Couplings at [squareroot]s
Author | : Usama Hussain |
Publisher | : |
Total Pages | : 0 |
Release | : 2020 |
ISBN-10 | : OCLC:1243893437 |
ISBN-13 | : |
Rating | : 4/5 (37 Downloads) |
Download or read book Measurements of ZZ Production Cross Section Using Four-lepton Events and Constraints on Anomalous Triple Gauge Couplings at [squareroot]s written by Usama Hussain and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of four-lepton production in proton-proton collisions, pp → (Z/[gamma]*)(Z/[gamma]*)→ 4l, where l = e or [mu], using data collected during 2016-2018 (Run II) are presented. The dataset corresponds to an integrated luminosity of 137 fb^(−1) at a center-of-mass energy of 13 TeV, collected by the CMS detector at the LHC. All reported measurements use the 2l2l' final states, where l,l' = e or [mu]. The total ZZ cross section for all events with two Z bosons in the mass range 60-120 GeV is measured and found to be [sigma](pp → ZZ) = 17.2 ± 0.3 (stat) ± 0.5 (syst) ± 0.4 (theo) ± 0.3 (lumi) pb. Differentialcross sections are measured as functions of a number of kinematic observables. Allthese results agree with standard model predictions. Searches for anomalous triplegauge couplings are performed, and the four-lepton invariant mass distributions areused to set the most stringent limits to date on a number of parameters affectingneutral gauge boson interactionsl