Measurements of the $ZZ$ production cross sections in the $$2\ell2\nu$$ channel in proton-proton collisions at $$\sqrt{s}$$ = 7 and 8 TeV and combined constraints on triple gauge couplings
Abstract
Measurements of the ZZ production cross sections in proton–proton collisions at center-of-mass energies of 7 and 8 TeV are presented. We found that candidate events for the leptonic decay mode ZZ → 2l2ν, where l denotes an electron or a muon, are reconstructed and selected from data corresponding to an integrated luminosity of 5.1 (19.6)fb-1 at 7 (8) TeV collected with the CMS experiment. The measured cross sections, σ(pp → ZZ)=5.1+1.5-1.4(stat)+1.4-1.1(syst)±0.1(lumi)pb at 7 TeV, and 7.2+0.8-0.8(stat)+1.9-1.5(syst)±0.2(lumi)pb at 8 TeV, are in good agreement with the standard model predictions with next-to-leading-order accuracy. Furthermore, the selected data are analyzed to search for anomalous triple gauge couplings involving the ZZ final state. In the absence of any deviation from the standard model predictions, limits are set on the relevant parameters. As a result, these limits are then combined with the previously published CMS results for ZZ in 4l final states, yielding the most stringent constraints on the anomalous couplings.
- Authors:
-
- Yerevan Physics Inst. (YerPhI), Yerevan (Armenia). et al.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- CMS Collaboration
- OSTI Identifier:
- 1221280
- Report Number(s):
- FERMILAB-PUB-15-114-CMS; CERN-PH-EP-2015-029; CMS-SMP-12-016
Journal ID: ISSN 1434-6052; arXiv eprint number arXiv:1503.05467
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- European Physical Journal. C, Particles and Fields (Online)
- Additional Journal Information:
- Journal Volume: 75; Journal Issue: 10; Journal ID: ISSN 1434-6052
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Khachatryan, Vardan. Measurements of the $ZZ$ production cross sections in the $2\ell2\nu$ channel in proton-proton collisions at $\sqrt{s}$ = 7 and 8 TeV and combined constraints on triple gauge couplings. United States: N. p., 2015.
Web. doi:10.1140/epjc/s10052-015-3706-0.
Khachatryan, Vardan. Measurements of the $ZZ$ production cross sections in the $2\ell2\nu$ channel in proton-proton collisions at $\sqrt{s}$ = 7 and 8 TeV and combined constraints on triple gauge couplings. United States. https://doi.org/10.1140/epjc/s10052-015-3706-0
Khachatryan, Vardan. 2015.
"Measurements of the $ZZ$ production cross sections in the $2\ell2\nu$ channel in proton-proton collisions at $\sqrt{s}$ = 7 and 8 TeV and combined constraints on triple gauge couplings". United States. https://doi.org/10.1140/epjc/s10052-015-3706-0. https://www.osti.gov/servlets/purl/1221280.
@article{osti_1221280,
title = {Measurements of the $ZZ$ production cross sections in the $2\ell2\nu$ channel in proton-proton collisions at $\sqrt{s}$ = 7 and 8 TeV and combined constraints on triple gauge couplings},
author = {Khachatryan, Vardan},
abstractNote = {Measurements of the ZZ production cross sections in proton–proton collisions at center-of-mass energies of 7 and 8 TeV are presented. We found that candidate events for the leptonic decay mode ZZ → 2l2ν, where l denotes an electron or a muon, are reconstructed and selected from data corresponding to an integrated luminosity of 5.1 (19.6)fb-1 at 7 (8) TeV collected with the CMS experiment. The measured cross sections, σ(pp → ZZ)=5.1+1.5-1.4(stat)+1.4-1.1(syst)±0.1(lumi)pb at 7 TeV, and 7.2+0.8-0.8(stat)+1.9-1.5(syst)±0.2(lumi)pb at 8 TeV, are in good agreement with the standard model predictions with next-to-leading-order accuracy. Furthermore, the selected data are analyzed to search for anomalous triple gauge couplings involving the ZZ final state. In the absence of any deviation from the standard model predictions, limits are set on the relevant parameters. As a result, these limits are then combined with the previously published CMS results for ZZ in 4l final states, yielding the most stringent constraints on the anomalous couplings.},
doi = {10.1140/epjc/s10052-015-3706-0},
url = {https://www.osti.gov/biblio/1221280},
journal = {European Physical Journal. C, Particles and Fields (Online)},
issn = {1434-6052},
number = 10,
volume = 75,
place = {United States},
year = {Thu Oct 29 00:00:00 EDT 2015},
month = {Thu Oct 29 00:00:00 EDT 2015}
}
Web of Science
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Works referencing / citing this record:
Measurement of the ZZ production cross section in proton-proton collisions at s = 8 $$ \sqrt{s}=8 $$ TeV using the ZZ → ℓ−ℓ+ℓ′−ℓ′+ and Z Z → ℓ − ℓ + ν ν ¯ $$ ZZ\to {\ell}^{-}{\ell}^{+}\nu \overline{\nu} $$ decay channels with the ATLAS detector
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