Measurement of the ZZ production cross section in ppbar collisions at √s=1.96 TeV

0367764 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš … celkem 422 autorů
Measurement of the ZZ production cross section in ppbar collisions at √s=1.96 TeV.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 84, č. 1 (2011), "011103-1"-"011103-8". ISSN 1550-7998
Grant CEP: GA MŠMT LA08047
Výzkumný záměr: CEZ:AV0Z10100502
Klíčová slova: D0 * Tevatron * lepton * final state * quantum chromodynamics * background
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 4.558, rok: 2011

We present a new measurement of the production cross section sigma(p (p) over bar -> ZZ) at a center-of-mass energy root s = 1.96 TeV, obtained from the analysis of the four charged lepton final state l(+)l(-)l´(+)l´-(l,l´ = e or mu). We observe ten candidate events with an expected background of 0: 37 +/- 0: 13 events. The measured cross section sigma(p (p) over bar -> ZZ) = 1.26(-0.37)(+0.47)(stat) +/- 0.14(syst) pb is in agreement with NLO QCD predictions. This result is combined with a previous result from the ZZ -> l(+)l(-)v (v) over bar channel resulting in a combined cross section of sigma(p (p) over bar -> ZZ) = 1.40(-0.37)(+0.43)(stat) +/- 0.14(syst) pb.
Trvalý link: http://hdl.handle.net/11104/0202320