| Document(s) |
Web Page
PhysRevLett.102.222002
arXiv:0902.2816
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| Contact(s) |
Michael Albrow, Emily Nurse
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| Abstract |
We present a search for exclusive Z boson production in proton-antiproton
collisions at sqrt(s) = 1.96 TeV, using the CDF II detector at Fermilab.
We observe no exclusive Z→ll candidates and place the first upper
limit on the exclusive Z cross section in hadron collisions,
σ(excl) < 0.96 pb at 95 % C.L.
In addition, we observe a continuum of exclusive lepton pairs consistent
with the quantum electrodynamic process pp →pγγp→pllp.
The cross section of the continuum for M(ll) > 40 GeV/c2 and |η(l)| < 4 is σ = 0.24^{+0.13}_{-0.10} pb, which is
the first measurement for this mass range and is
consistent with the standard model prediction.
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| Comments |
Last Update: June 2009 Dataset: 2-2.2 fb-1
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