Standard Model $H\to Z{Z}^{(\ast )}\to \ell \ell \ell \ell$, $\ell \ell \nu \nu$, $\ell \ell qq$ Searches with ATLAS at the LHC

Abstract

The latest results on the direct experimental search for a Standard Model Higgs boson decaying to a pair of Z bosons are presented. Three distinct final states are considered: $H\to Z{Z}^{(\ast )}\to \ell \ell \ell \ell$, $H\to ZZ\to \ell \ell \nu \nu$, and $H\to ZZ\to \ell \ell qq$, where $\ell =e,\mu$. A dataset of more than 1fb${}^{-1}$ of proton-proton collisions at $\sqrt{s}=7$ TeV collected by the ATLAS detector at the CERN LHC during the on-going 2011 run is used. In this model and for these final states, Higgs boson masses in the ranges 192 GeV $<m_H<$ 196 GeV, 214 $<m_H<$ 222 GeV, and 340 $<m_H<$ 460 GeV have been excluded at the 95% confidence level.

arXiv comment3 pages, 4 figures, PIC 2011, XXXI PHYSICS IN COLLISION, Vancouver, BC Canada, August 28 - September 1, 2011