Assertion: lepton's mass | /r/HasProperty | 126.0 ± 0.6 gev/c2
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Source sentences:
text: On 4 July 2012 both of the CERN experiments announced they had independently made the same discovery: CMS of a previously unknown boson with mass 125.3 ± 0.6 GeV/c2 and ATLAS of a boson with mass 126.0 ± 0.6 GeV/c2.