Search for the Standard Model Higgs Boson in the Decay Channel  H → Z Z → 4 l  in  p p  Collisions at  √ s = 7  TeV

CMS Collaboration; U Akgun; E. A Albayrak; B Bilki; W Clarida; F. Duru; S. Griffiths; C. K. Lae; E McCliment; J-P Merlo; H Mermerkaya; A Mestvirishvili; A Moeller; J Nachtman; C. R Newsom; E Norbeck; J Olson; Y Onel; F Ozok; S Sen; E Tiras; J Wetzel; T Yetkin; K Yi

doi:10.1103/PhysRevLett.108.111804

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Search for the Standard Model Higgs Boson in the Decay Channel H → Z Z → 4 l in p p Collisions at √ s = 7 TeV

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Search for the Standard Model Higgs Boson in the Decay Channel H → Z Z → 4 l in p p Collisions at √ s = 7 TeV

CMS Collaboration, U Akgun, E. A Albayrak, B Bilki, W Clarida, F. Duru, S. Griffiths, C. K. Lae, E McCliment, J-P Merlo, …

Physical review letters, Vol.108(11), 111804

2012

DOI: 10.1103/PhysRevLett.108.111804

PMID: 22540464

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Abstract

A search for a Higgs boson in the four-lepton decay channel H→ZZ, with each Z boson decaying to an electron or muon pair, is reported. The search covers Higgs boson mass hypotheses in the range of 110<mH<600 GeV. The analysis uses data corresponding to an integrated luminosity of 4.7 fb−1 recorded by the CMS detector in pp collisions at √s=7 TeV from the LHC. Seventy-two events are observed with four-lepton invariant mass m4ℓ>100 GeV (with 13 below 160 GeV), while 67.1±6.0 (9.5±1.3) events are expected from background. The four-lepton mass distribution is consistent with the expectation of standard model background production of ZZ pairs. Upper limits at 95% confidence level exclude the standard model Higgs boson in the ranges of 134–158 GeV, 180–305 GeV, and 340–465 GeV. Small excesses of events are observed around masses of 119, 126, and 320 GeV, making the observed limits weaker than expected in the absence of a signal.

Details

Title: Subtitle: Search for the Standard Model Higgs Boson in the Decay Channel H → Z Z → 4 l in p p Collisions at √ s = 7 TeV
Creators: CMS Collaboration
U Akgun - University of Iowa, Physics and Astronomy
E. A Albayrak - University of Iowa, Physics and Astronomy
B Bilki - University of Iowa, Physics and Astronomy
W Clarida
F. Duru - University of Iowa
S. Griffiths - University of Iowa
C. K. Lae - University of Iowa
E McCliment - University of Iowa, Physics and Astronomy
J-P Merlo - University of Iowa
H Mermerkaya - University of Iowa
A Mestvirishvili - University of Iowa, Physics and Astronomy
A Moeller - University of Iowa
J Nachtman - University of Iowa, Physics and Astronomy
C. R Newsom - University of Iowa, Physics and Astronomy
E Norbeck
J Olson - University of Iowa
Y Onel - University of Iowa, Physics and Astronomy
F Ozok - University of Iowa
S Sen
E Tiras - University of Iowa, Physics and Astronomy
J Wetzel - University of Iowa, Physics and Astronomy
T Yetkin - University of Iowa, Physics and Astronomy
K Yi - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: Physical review letters, Vol.108(11), 111804
DOI: 10.1103/PhysRevLett.108.111804
PMID: 22540464
NLM abbreviation: Phys Rev Lett
ISSN: 0031-9007
eISSN: 1079-7114
Publisher: American Physical Society
Grant note: DOI: 10.13039/100000015, name: U.S. Department of Energy; DOI: 10.13039/100000001, name: National Science Foundation
Language: English
Date published: 2012
Academic Unit: Physics and Astronomy
Record Identifier: 9984443740802771

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