Search for the standard model Higgs boson in the ZH→ννˉbbˉ channel in 9.5 fb.sup.−1./sup. of ppˉ collisions at √s=1.96 TeV

0384681 - FZÚ 2013 RIV NL eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš … celkem 395 autorů
Search for the standard model Higgs boson in the ZH→ννˉbbˉ channel in 9.5 fb⁻¹ of ppˉ collisions at √s=1.96 TeV.
Physics Letters. B. Roč. 716, č. 2 (2012), s. 285-293. ISSN 0370-2693. E-ISSN 1873-2445
Grant CEP: GA MŠMT LA08047; GA MŠMT(CZ) LG12006
Výzkumný záměr: CEZ:AV0Z10100502
Klíčová slova: D0 * Tevatron * standard model * Higgs boson * channel * lepton
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 4.569, rok: 2012
http://www.sciencedirect.com/science/article/pii/S0370269312008842

We present a search for the standard model Higgs boson in 9.5 fb-1 of ppbar collisions at sqrt(s) = 1.96 TeV collected with the D0 detector at the Fermilab Tevatron Collider. The final state considered contains a pair of b jets and is characterized by an imbalance in transverse energy, as expected from ppbar->ZH->vvbb production. The search is also sensitive to the WH->lvbb channel when the charged lepton is not identified. The data are found to be in good agreement with the expected background. For a Higgs boson mass of 125 GeV, we set a limit at the 95% C.L. on the cross section sigma(ppbar->[Z/W]H), assuming standard model branching fractions, that is a factor of 4.3 times larger than the theoretical standard model value, while the expected factor is 3.9. The search is also used to measure a combined WZ and ZZ production cross section that is a factor of 0.94 +/- 0.31(stat) +/- 0.34(syst) times the standard model prediction of 4.4 pb, with an observed significance of 2.0.
Trvalý link: http://hdl.handle.net/11104/0214247