Observation of ZZ Production in p(p)over-bar Collisions at root s=1.96 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
30/09/2013
20/05/2014
30/09/2013
20/05/2014
24/10/2008
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Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) We present an observation for ZZ -> l(+) l(-) l'(+) l'(-) (l, l' =e or mu) production in p (p) over bar collisions at a center-of-mass energy of root s = 1.96 TeV. Using 1.7 fb(-1) of data collected by the D0 experiment at the Fermilab Tevatron Collider, we observe three candidate events with an expected background of 0.14(-0.02)(+0.03) events. The significance of this observation is 5.3 standard deviations. The combination of D0 results in this channel, as well as in ZZ -> l(+) l(-) v (v) over bar yields a significance of 5.7 standard deviations and a combined cross section of sigma(ZZ) = 1.60 +/- 0.63(stat)(-0.17)(+0.16)(syst) pb. |
Formato |
7 |
Identificador |
http://dx.doi.org/10.1103/PhysRevLett.101.171803 Physical Review Letters. College Pk: Amer Physical Soc, v. 101, n. 17, p. 7, 2008. 0031-9007 http://hdl.handle.net/11449/24422 10.1103/PhysRevLett.101.171803 WOS:000260383600018 WOS000260383600018.pdf |
Idioma(s) |
eng |
Publicador |
Amer Physical Soc |
Relação |
Physical Review Letters |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |