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CDF PRELIMINARY
Limits on Z' production
ee + Np (110 pb-)
CDF PRELIMINARY
Limits on Z' production(95 % C.L.)
--B predicted
using SM couplings
95% C.L. o-B limt(lA PRD p b)
505 GeV/c -
95% C . B limit0eV
200 400 600
Z' Mass (GeV/c2)
0
a,
A
b
(a) Limits on Z' production as a func-
tion of the Z' mass for a standard
model Z'
0-I
NN 585 G1eV/c
590 GeV/c
Boa Z Z,
580 GeV/c 555 GeV/c
a Z - ZLR 0
10
610 GeV/c 620 GeV/c 10
10-* N -0
Z' mass (GeV)
(b) Limits on Z' production as a func-
tion of Z' mass for several models
References
1. G. G. Ross, Grand Unified Theories, (Cambridge University Press, Cam-
bridge, England, 1987), and references therein.
2. F. del Aguila, M. Quiros and F. Zwirner, Nucl. Phys. B 287, 457
(1987),F. Feruglio,L. Maiani and A. Masiero, Phys. Lett. B 233, 512
(1989)
3. H. Georgi and S. L. Glashow, in Harvard University Preprint HUTP-
96/A024, (1996) and J. L. Rosner in CERN Preprint CERN-TH/96-
169, (1996) discuss a Z' that does not couple to Standard Model leptons.
No limits can be set on such a Z' from this analysis.
4. The previous direct search at CDF in the dielectron decay mode using
20 pb-1 of data is described in F. Abe et al,Phys. Rev. D 51, R949
(1995)
5. For a detailed description of the CDF detector see F. Abe et al,Nucl.
Instrum. Methods A 271, 387 (1988) and references therein.
3
.00
.01
10.00
5.00
0
-W 1.00
0 0.50
A
b 0.10
0.05