Study of $Z \gamma$ events and limits on anomalous $Z Z \gamma$ and $Z \gamma \gamma$ couplings in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96-TeV - INSPIRE

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Study of $Z \gamma$ events and limits on anomalous $Z Z \gamma$ and $Z \gamma \gamma$ couplings in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96-TeV

D0

Collaboration

Feb, 2005

7 pages

Published in:

Phys.Rev.Lett. 95 (2005) 051802

e-Print:

hep-ex/0502036 [hep-ex]

DOI:

10.1103/PhysRevLett.95.051802

Report number:

FERMILAB-PUB-05-023-E

Experiments:

FNAL-E-0823

View in:

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Abstract:

We present a measurement of the Z\gamma production cross section and limits on anomalous ZZ\gamma and Z\gamma\gamma couplings for form-factor scales of Lambda = 750 and 1000 GeV. The measurement is based on 138 (152) candidate events in the ee\gamma (\mu\mu\gamma) final state using 320 (290) pb^{-1} of ppbar collisions at \sqrt{s} = 1.96 TeV. The 95% C.L. limits on real and imaginary parts of individual anomalous couplings are |h_{10,30}^{Z}|<0.23, |h_{20,40}^{Z}|<0.020, |h_{10,30}^{\gamma}|<0.23, and |h_{20,40}^{\gamma}|<0.019 for Lambda = 1000 GeV.

Note:

submitted to Phys. Rev. Letters Report-no: FERMILAB-PUB-05-023-E

12.15.Ji
13.40.Em
13.38.Dg
13.85.Qk
intermediate boson production
high-energy elementary particle interactions
intermediate boson decay
standard model
Z bosons
proton-proton inclusive interactions

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