Editing UA2 experiment (section)

===Discovery of the W and Z bosons===
The UA2 and UA1 collaboration chose to search for the W boson by identifying its [[lepton]]ic decay, because the [[hadron]]ic decays, although more frequent, have a larger background.<ref name=Rubbia/> By the end 1982, the Sp{{overline|p}}S had reached high enough luminosity to permit the observation of <math> W \rightarrow e \nu </math> and <math> W \rightarrow \mu \nu </math> decays. On 22 January 1983, the UA2 collaboration announced that the UA2 detector had recorded four events that were candidates for a W boson. This brought the combined number of candidate events seen by UA1 and UA2 up to 10.  Three days later, CERN made a public announcement that the W boson was found.<ref name=WCERN>{{cite web |last=O'Luanaigh |first=Cian |date=12 March 2015 |title=Carrying the Weak Force: Thirty Years of the W boson |url=https://home.cern/about/updates/2013/01/carrying-weak-force-thirty-years-w-boson |publisher=CERN |access-date=21 June 2017}}</ref>

The next step was to track down the Z boson. However, the theory said that the Z boson would be ten times rarer than the W boson. The experiments therefore needed to collect several times the data collected in the 1982 run that showed the existence of the W boson. With improved techniques and methods, the luminosity was increased substantially.<ref name=Experiments>{{cite web |url=https://cern-discoveries.web.cern.ch/cern-discoveries/Courier/experiments/Experiments.html |title=The experiments |date=1983 |publisher=CERN Courier, CERN Discoveries |access-date=22 June 2017}}</ref> These efforts were successful, and on 1 June 1983, the formal announcement of the discovery of the Z boson was made at CERN.<ref>{{cite web|url=https://home.cern/about/updates/2013/05/thirty-years-z-boson|title=Thirty years of the Z boson {{!}} CERN|website=home.cern|language=en|access-date=2017-06-23}}</ref>