Journal
PHYSICAL REVIEW LETTERS
Volume 101, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.171803
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Funding
- DOE and NSF (USA)
- CEA and CNRS/IN2P3 (France)
- FASI, Rosatom, and RFBR (Russia)
- CNPq, FAPERJ, FAPESP, and FUNDUNESP (Brazil)
- DAE and DST (India)
- Colciencias (Colombia)
- CONACyT (Mexico)
- KRF and KOSEF (Korea)
- CONICET and UBACyT (Argentina)
- FOM (The Netherlands)
- STFC (United Kingdom)
- MSMT and GACR (Czech Republic)
- CRC Program, CFI, NSERC and WestGrid Project (Canada)
- BMBF and DFG (Germany)
- SFI (Ireland)
- The Swedish Research Council (Sweden)
- CAS and CNSF (China)
- Alexander von Humboldt Foundation (Germany)
- Istituto Nazionale di Fisica Nucleare (Italy)
- Science and Technology Facilities Council [ST/F00754X/1, ST/F007418/1, PP/E000487/1] Funding Source: researchfish
- STFC [ST/F007418/1, ST/F00754X/1, PP/E000487/1] Funding Source: UKRI
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We present an observation for ZZ -> l(+) l(-) l'(+) l'(-) (l, l' =e or mu) production in p (p) over bar collisions at a center-of-mass energy of root s = 1.96 TeV. Using 1.7 fb(-1) of data collected by the D0 experiment at the Fermilab Tevatron Collider, we observe three candidate events with an expected background of 0.14(-0.02)(+0.03) events. The significance of this observation is 5.3 standard deviations. The combination of D0 results in this channel, as well as in ZZ -> l(+) l(-) v (v) over bar yields a significance of 5.7 standard deviations and a combined cross section of sigma(ZZ) = 1.60 +/- 0.63(stat)(-0.17)(+0.16)(syst) pb.
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