About   Contents   Introduction   Synopsis   Search   Subject Index   Summaries   Texts

ABE 1995

CDF collaboration; Abe, F. et al.
Observation of Top Quark Production in anti-p p Collisions
Phys. Rev. Lett. 74 (1995) 2626;

Abstracts
We establish the existence of the top quark using a 67 pb^-1 data sample of anti-pp collisions at = 1.8 TeV collected with the Collider Detector at Fermilab (CDF). Employing techniques similar to those we previously published, we observe a signal consistent with t anti-t decay to WWb anti-b, but inconsistent with the background prediction by 4.8σ. Additional evidence for the top quark is provided by a peak in the reconstructed mass distribution. We measure the top quark mass to be 176 ± 8(stat) ± 10(syst) GeV/c², and the t anti-t production cross section to be 6.8^+3.6_-2.4 pb.

Accelerator FNAL-COLLIDER Detectors CDF

Related references
More (earlier) information appears in
F. Abe et al., Phys. Rev. D50 (1994) 2966;
F. Abe et al., Phys. Rev. Lett. 73 (1994) 225;
See also
F. Abe et al., preprint HEP-EX-9412009 (1994);
S. Abachi et al., Phys. Rev. Lett. 72 (1994) 2138;

Reactions

	anti-p p μ+ e– 2jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p μ– e+ 2jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p μ– μ+ 2jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p e– e+ 2jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p μ+ e– 3jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p μ+ e+ 3jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p 2μ+ 3jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p μ– e– 3jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p μ– e+ 3jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p μ– μ+ 3jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p e+ 4jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p e– 4jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p μ– 4jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p μ+ 4jet X	1.8 TeV (Ecm)	pt, et, mass
	anti-p p anti-t t X	1.8 TeV (Ecm)	cs
	W+ e+ νe
	W– e– anti-νe
	W+ μ+ νμ
	W– μ– anti-νμ
	t W+ b
	anti-t W– anti-b
	W+ 2jet
	W– 2jet
	b jet
	b μ– X
	anti-b jet
	anti-b μ+ X

Particles studied

	t	ex, mass
	anti-t	ex, mass

Record comments
Observation of the top quark. CDF Collaboration.

New Comments List of Comments About   Contents   Introduction   Synopsis   Search   Subject Index   Summaries   Texts