Observation of $Z Z$ production in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96-TeV - INSPIRE

DataBETA

Observation of $Z Z$ production in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96-TeV

D0

Collaboration

Aug, 2008

7 pages

Published in:

Phys.Rev.Lett. 101 (2008) 171803

e-Print:

0808.0703 [hep-ex]

DOI:

10.1103/PhysRevLett.101.171803

Report number:

FERMILAB-PUB-08-279-E

Experiments:

FNAL-E-0823

View in:

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Abstract: (arXiv)

We present an observation for ZZ -> l+l-l'+l'- (l, l' = e or mu) production in ppbar collisions at a center-of-mass energy of sqrt(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 +0.03 -0.02 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-nunubar, yields a significance of 5.7 standard deviations and a combined cross section of sigma(ZZ) = 1.60 +/- 0.63 (stat.) +0.16 -0.17 (syst.) pb.

Note:

7 pages, 1 figure, submitted to Phys. Rev. Lett

12.15.Ji
07.05.Kf
14.70.Hp
13.85.Qk
anti-p p: interaction
Z0: pair production
Z0: leptonic decay
mass spectrum: (4lepton)
channel cross section
DZERO

References(13)

Figures(1)

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