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ANSARI 1987E

UA2 collaboration; Ansari, R. et al.
Measurement of the Standard Model Parameters from a Study of W and Z Bosons
Phys. Lett. 186B (1987) 440;

Abstracts
A study has been made of the decays W → eν and Z → e⁺e^–, using the UA2 detector at the CERN anti-pp Collider. The data correspond to an integrated luminosity of 142 nb^-1 at a centre-of-mass collision energy = 546 GeV, and 768 nb^-1 at = 630 GeV. Measurements of the standard model parameters from samples of 251 W decay and 39 Z decay candidates are compared with expectations of the standard electroweak model.

Accelerator CERN-PBAR/P Detectors UA2

Related references
See also
UA2 Coll., M. Banner et al., Phys. Lett. 122B (1983) 476;
J. A. Appel et al., Z. Phys. C30 (1986) 1;
UA2 Coll., P. Bagnaia et al., Phys. Lett. 129B (1983) 130;

Reactions

	anti-p p W+ X	546,630 GeV (Ecm)	cs
	anti-p p W– X	546,630 GeV (Ecm)	cs
	anti-p p Zo X	546,630 GeV (Ecm)	cs
	W+ e+ νe		angp
	W– e– anti-νe		angp
	Zo e– e+

Particles studied

	W+	mass, w
	W–	mass, w
	Zo	mass, w

Record comments
Firm establishment of properties of the W⁺, W^–, and Z^o bosons.

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