Search for ZZ resonances in the 2ℓ2ν final state in proton-proton collisions at 13 TeV
A search for heavy resonances decaying to a pair of Z bosons is performed using data collected with the CMS detector at the LHC. Events are selected by requiring two oppositely charged leptons (electrons or muons), consistent with the decay of a Z boson, and large missing transverse momentum, which is interpreted as arising from the decay of a second Z boson to two neutrinos. The analysis uses data from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb$$^{-1}$$. The hypothesis of a spin-2 bulk graviton (X) decaying to a pair of Z bosons is examined for 600 $$\le m_\mathrm{X} \le$$ 2500 GeV and upper limits at 95% confidence level are set on the product of the production cross section and branching fraction of X $$\to$$ ZZ ranging from 100 to 4 fb. For bulk graviton models characterized by a curvature scale parameter $$\tilde{k} =$$ 0.5 in the extra dimension, the region $$m_\mathrm{X} < $$ 800 GeV is excluded, providing the most stringent limit reported to date. Variations of the model considering the possibility of a wide resonance produced exclusively via gluon-gluon fusion or $$\mathrm{q}\overline{\mathrm{q}}$$ annihilation are also examined.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- The CMS collaboration
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1409343
- Report Number(s):
- FERMILAB-PUB-17-527-CMS; CMS-B2G-16-023; CERN-EP-2017-279; arXiv:1711.04370; 1635891
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2018, Issue 3; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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