We present a search for the standard model Higgs boson produced in association with a Z boson, using up to 7.9 fb(-1) of integrated luminosity from p (p) over bar collisions collected with the CDF II detector. We utilize several novel techniques, including multivariate lepton selection, multivariate trigger parametrization, and a multi-stage signal discriminant consisting of specialized functions trained to distinguish individual backgrounds. By increasing acceptance and enhancing signal discrimination, these techniques have significantly improved the sensitivity of the analysis above what was expected from a larger dataset alone. We observe no significant evidence for a signal, and we set limits on the ZH production cross section. For a Higgs boson with mass 115 GeV/c(2), we expect (observe) a limit of 3.9 (4.8) times the standard model predicted value, at the 95% credibility level. (c) 2012 Elsevier B.V. All rights reserved. RI song, hao/I-2782-2012; Zanetti, Anna/I-3893-2012

Search for the standard model Higgs boson produced in association with a Z boson in 7.9 fb(-1) of p(p)over-bar collisions at root s=1.96 TeV using the CDF ll detector

Piacentino G;
2012-01-01

Abstract

We present a search for the standard model Higgs boson produced in association with a Z boson, using up to 7.9 fb(-1) of integrated luminosity from p (p) over bar collisions collected with the CDF II detector. We utilize several novel techniques, including multivariate lepton selection, multivariate trigger parametrization, and a multi-stage signal discriminant consisting of specialized functions trained to distinguish individual backgrounds. By increasing acceptance and enhancing signal discrimination, these techniques have significantly improved the sensitivity of the analysis above what was expected from a larger dataset alone. We observe no significant evidence for a signal, and we set limits on the ZH production cross section. For a Higgs boson with mass 115 GeV/c(2), we expect (observe) a limit of 3.9 (4.8) times the standard model predicted value, at the 95% credibility level. (c) 2012 Elsevier B.V. All rights reserved. RI song, hao/I-2782-2012; Zanetti, Anna/I-3893-2012
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11695/4282
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 2
social impact