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Measurement of the ZZZZ Production Cross Section in ppˉp\bar{p} Collisions at s=1.96\sqrt{s}=1.96 TeV

Collaboration
Apr, 2011
14 pages
Published in:
  • Phys.Rev.D 84 (2011) 011103
e-Print:
DOI:
Report number:
  • FERMILAB-PUB-11-158-E
Experiments:
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2011201420172020202102468101214
Abstract: (arXiv)
We present a new measurement of the production cross section σ(ppˉ→ZZ)\sigma(p\bar{p} \rightarrow ZZ) at a center-of-mass energy s=1.96\sqrt{s}=1.96 TeV, obtained from the analysis of the four charged lepton final state ℓ+ℓ−ℓ′+ℓ′−\ell^{+}\ell^{-}\ell^{'+} \ell^{'-} (ℓ\ell, ℓ′\ell^{'} = ee or μ\mu). We observe ten candidate events with an expected background of 0.37±0.130.37 \pm 0.13 events. The measured cross section σ(ppˉ→ZZ)=1.26−0.37+0.47(stat)±0.14(syst)\sigma(p\bar{p} \to ZZ)= 1.26^{+0.47}_{-0.37} \mathrm{(stat)} \pm 0.14 \mathrm{(syst)} pb is in agreement with NLO QCD predictions. This result is combined with a previous result from the ZZ→ℓ+ℓ−ννˉZZ\to\ell^{+}\ell^{-}\nu\bar{\nu} channel resulting in a combined cross section of σ(ppˉ→ZZ)=1.40−0.37+0.43(stat)±0.14(syst)\sigma(p\bar{p} \to ZZ)= 1.40^{+0.43}_{-0.37} \mathrm{(stat)} \pm 0.14 \mathrm{(syst)} pb.
Note:
  • Submitted to Phys. Rev. D
  • 12.15.Ji
  • 14.70.Hp
  • 13.85.Qk
  • lepton: final state
  • quantum chromodynamics
  • background