Search for Higgs boson decays to a photon and a Z boson in pp collisions at root s=7 and 8 TeV with the ATLAS detector

ATLAS Collaboration

doi:10.1016/j.physletb.2014.03.015

Search for Higgs boson decays to a photon and a Z boson in pp collisions at root s=7 and 8 TeV with the ATLAS detector

ATLAS Collaboration

Research output: Contribution to journal › Article › peer-review

76 Citations (Scopus)

Abstract

A search is reported for a neutral Higgs boson in the decay channel H -> Z gamma, Z -> l(+)l(-) (l = e, mu), using 4.5 fb(-1) of pp collisions at root s = 7 TeV and 20.3 fb(-1) of pp collisions at root s = 8 TeV, recorded by the ATLAS detector at the CERN Large Hadron Collider. The observed distribution of the invariant mass of the three final-state particles, m(ll gamma), is consistent with the Standard Model hypothesis in the investigated mass range of 120-150 GeV. For a Higgs boson with a mass of 125.5 GeV, the observed upper limit at the 95% confidence level is 11 times the Standard Model expectation. Upper limits are set on the cross section times branching ratio of a neutral Higgs boson with mass in the range 120-150 GeV between 0.13 and 0.5 pb for root s = 8 TeV at 95% confidence level.

Original language	English
Pages (from-to)	8-27
Journal	Physics Letters B
Volume	732
DOIs	https://doi.org/10.1016/j.physletb.2014.03.015
Publication status	Published - 1 May 2014

Keywords

HADRON COLLIDERS
QCD CORRECTIONS
STANDARD MODEL
NNLO QCD
LHC

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10.1016/j.physletb.2014.03.015

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@article{5bc032a575144413a94da6bbfbe87843,

title = "Search for Higgs boson decays to a photon and a Z boson in pp collisions at root s=7 and 8 TeV with the ATLAS detector",

abstract = "A search is reported for a neutral Higgs boson in the decay channel H -> Z gamma, Z -> l(+)l(-) (l = e, mu), using 4.5 fb(-1) of pp collisions at root s = 7 TeV and 20.3 fb(-1) of pp collisions at root s = 8 TeV, recorded by the ATLAS detector at the CERN Large Hadron Collider. The observed distribution of the invariant mass of the three final-state particles, m(ll gamma), is consistent with the Standard Model hypothesis in the investigated mass range of 120-150 GeV. For a Higgs boson with a mass of 125.5 GeV, the observed upper limit at the 95% confidence level is 11 times the Standard Model expectation. Upper limits are set on the cross section times branching ratio of a neutral Higgs boson with mass in the range 120-150 GeV between 0.13 and 0.5 pb for root s = 8 TeV at 95% confidence level. ",

keywords = "HADRON COLLIDERS , QCD CORRECTIONS , STANDARD MODEL , NNLO QCD , LHC",

author = "AD Wemans and {ATLAS Collaboration}",

year = "2014",

month = may,

day = "1",

doi = "10.1016/j.physletb.2014.03.015",

language = "English",

volume = "732",

pages = "8--27",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "North-Holland | Elsevier",

}

TY - JOUR

T1 - Search for Higgs boson decays to a photon and a Z boson in pp collisions at root s=7 and 8 TeV with the ATLAS detector

AU - Wemans, AD

AU - ATLAS Collaboration

PY - 2014/5/1

Y1 - 2014/5/1

N2 - A search is reported for a neutral Higgs boson in the decay channel H -> Z gamma, Z -> l(+)l(-) (l = e, mu), using 4.5 fb(-1) of pp collisions at root s = 7 TeV and 20.3 fb(-1) of pp collisions at root s = 8 TeV, recorded by the ATLAS detector at the CERN Large Hadron Collider. The observed distribution of the invariant mass of the three final-state particles, m(ll gamma), is consistent with the Standard Model hypothesis in the investigated mass range of 120-150 GeV. For a Higgs boson with a mass of 125.5 GeV, the observed upper limit at the 95% confidence level is 11 times the Standard Model expectation. Upper limits are set on the cross section times branching ratio of a neutral Higgs boson with mass in the range 120-150 GeV between 0.13 and 0.5 pb for root s = 8 TeV at 95% confidence level.

AB - A search is reported for a neutral Higgs boson in the decay channel H -> Z gamma, Z -> l(+)l(-) (l = e, mu), using 4.5 fb(-1) of pp collisions at root s = 7 TeV and 20.3 fb(-1) of pp collisions at root s = 8 TeV, recorded by the ATLAS detector at the CERN Large Hadron Collider. The observed distribution of the invariant mass of the three final-state particles, m(ll gamma), is consistent with the Standard Model hypothesis in the investigated mass range of 120-150 GeV. For a Higgs boson with a mass of 125.5 GeV, the observed upper limit at the 95% confidence level is 11 times the Standard Model expectation. Upper limits are set on the cross section times branching ratio of a neutral Higgs boson with mass in the range 120-150 GeV between 0.13 and 0.5 pb for root s = 8 TeV at 95% confidence level.

KW - HADRON COLLIDERS

KW - QCD CORRECTIONS

KW - STANDARD MODEL

KW - NNLO QCD

KW - LHC

U2 - 10.1016/j.physletb.2014.03.015

DO - 10.1016/j.physletb.2014.03.015

M3 - Article

VL - 732

SP - 8

EP - 27

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

ER -

Search for Higgs boson decays to a photon and a Z boson in pp collisions at root s=7 and 8 TeV with the ATLAS detector

Abstract

Keywords

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