Search for the Standard Model Higgs Boson in the Decay Channel<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>H</mml:mi><mml:mo>→</mml:mo><mml:mi>Z</mml:mi><mml:mi>Z</mml:mi><mml:mo>→</mml:mo><mml:mn>4</mml:mn><mml:mi>l</mml:mi></mml:math>in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math>Collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>7</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:math>

S. Chatrchyan , V. Khachatryan , A. M. Sirunyan , S. Chatrchyan , V. Khachatryan , A. M. Sirunyan , A. Tumasyan , W. Adam , T. Bergauer , M. Dragicevic , J. Erö , C. Fabjan , M. Friedl , R. Frühwirth , V. M. Ghete , J. Hammer , M. Hoch , N. Hörmann , J. Hrubec , M. Jeitler , W. Kiesenhofer , M. Krammer , D. Liko , I. Mikulec , M. Pernicka , B. Rahbaran , C. Rohringer , H. Rohringer , R. Schöfbeck , J. Strauss , A. Taurok , F. A. Teischinger , P. Wagner , W. Waltenberger , G. Walzel , E. Widl , C.-E. Wulz , V. Mossolov , N. Shumeiko , J. Suarez Gonzalez , S. Bansal , L. Benucci , T. Cornelis , E. A. De Wolf , X. Janssen , S. Luyckx , T. Maes , L. Mucibello , S. Ochesanu , B. Roland , R. Rougny , M. Selvaggi , H. Van Haevermaet , P. Van Mechelen , N. Van Remortel , A. Van Spilbeeck , F. Blekman , S. Blyweert , J. D’Hondt , R. Gonzalez Suarez , A. Kalogeropoulos , M. Maes , A. Olbrechts , W. Van Doninck , P. Van Mulders , G. P. Van Onsem , I. Villella , O. Charaf , B. Clerbaux , G. De Lentdecker , V. Dero , A. P. R. Gay , G. H. Hammad , T. Hreus , A. Léonard , P. Marage , L. Thomas , C. Vander Velde , P. Vanlaer , J. Wickens , V. Adler , K. Beernaert , A. Cimmino , S. Costantini , G. Garcia , M. Grünewald , B. Klein , J. Lellouch , A. Marinov , J. Mccartin , A. A. Ocampo Rios , D. Ryckbosch , N. Strobbe , F. Thyssen , M. Tytgat , L. Vanelderen , P. Verwilligen , S. Walsh , E. Yazgan , N. Zaganidis , S. Başeğmez , G. Bruno , L. Ceard
2012 Physical Review Letters 114 citations

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<m(H)<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 m(4ℓ)>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.

Keywords

PhysicsHiggs bosonParticle physicsMuonLeptonStandard Model (mathematical formulation)Nuclear physicsLuminosityLarge Hadron ColliderBosonInvariant massElectronAstrophysics

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Publication Info

Year
2012
Type
article
Volume
108
Issue
11
Pages
111804-111804
Citations
114
Access
Closed

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S. Chatrchyan, V. Khachatryan, A. M. Sirunyan et al. (2012). Search for the Standard Model Higgs Boson in the Decay Channel<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>H</mml:mi><mml:mo>→</mml:mo><mml:mi>Z</mml:mi><mml:mi>Z</mml:mi><mml:mo>→</mml:mo><mml:mn>4</mml:mn><mml:mi>l</mml:mi></mml:math>in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math>Collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>7</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:math>. Physical Review Letters , 108 (11) , 111804-111804. https://doi.org/10.1103/physrevlett.108.111804

Identifiers

DOI
10.1103/physrevlett.108.111804