ATTENTION: The software behind KU ScholarWorks is being upgraded to a new version. Starting July 15th, users will not be able to log in to the system, add items, nor make any changes until the new version is in place at the end of July. Searching for articles and opening files will continue to work while the system is being updated.
If you have any questions, please contact Marianne Reed at mreed@ku.edu .
Measurement of the ZZ production cross section and Z→ ℓ+ ℓ− ℓ′+ ℓ′− branching fraction in pp collisions at √s =13 TeV
dc.contributor.author | CMS Collaboration | |
dc.date.accessioned | 2017-10-10T17:13:50Z | |
dc.date.available | 2017-10-10T17:13:50Z | |
dc.date.issued | 2016-10-27 | |
dc.identifier.citation | CMS collaboration. "Measurement of the ZZ production cross section and Z→ ℓ+ ℓ− ℓ′+ ℓ′− branching fraction in pp collisions at √s =13 TeV." Physics letters B 763 (2016): 280-303. | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/25113 | |
dc.description.abstract | Four-lepton production in proton–proton collisions, pp→(Z/γ⁎)(Z/γ⁎)→ℓ+ℓ−ℓ′+ℓ′−pp→(Z/γ⁎)(Z/γ⁎)→ℓ+ℓ−ℓ′+ℓ′−, where ℓ,ℓ′=eℓ,ℓ′=e or μ, is studied at a center-of-mass energy of 13 TeV with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 2.6 fb−1. The ZZ production cross section, View the MathML sourceσ(pp→ZZ)=14.6−1.8+1.9(stat)−0.3+0.5(syst)±0.2(theo)±0.4(lumi)pb, is measured for events with two opposite-sign, same-flavor lepton pairs produced in the mass region 60<mℓ+ℓ−,mℓ′+ℓ′−<120 GeV60<mℓ+ℓ−,mℓ′+ℓ′−<120 GeV. The Z boson branching fraction to four leptons is measured to be View the MathML sourceB(Z→ℓ+ℓ−ℓ′+ℓ′−)=4.9−0.7+0.8 (stat)−0.2+0.3 (syst)−0.1+0.2(theo)±0.1(lumi)×10−6 for the four-lepton invariant mass in the range 80<mℓ+ℓ−ℓ′+ℓ′−<100 GeV80<mℓ+ℓ−ℓ′+ℓ′−<100 GeV and dilepton mass mℓ+ℓ−>4 GeVmℓ+ℓ−>4 GeV for all opposite-sign, same-flavor lepton pairs. The results are in agreement with standard model predictions. | en_US |
dc.publisher | Elsevier | en_US |
dc.rights | ©2016 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license. | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en_US |
dc.title | Measurement of the ZZ production cross section and Z→ ℓ+ ℓ− ℓ′+ ℓ′− branching fraction in pp collisions at √s =13 TeV | en_US |
dc.type | Article | en_US |
kusw.kudepartment | Physics and Astronomy | en_US |
dc.identifier.doi | 10.1016/j.physletb.2016.10.054 | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess |