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Published April 2012 | Published
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Search for a Higgs boson in the decay channel H → ZZ^(*) → qqℓ^-ℓ^+ in pp collisions at √s = 7TeV

Chatrchyan, S.
Apresyan, A. ORCID icon
Bornheim, A. ORCID icon
Bunn, J. ORCID icon
Chen, Y.
Di Marco, E.
Duarte, J.
Gataullin, M.
Ma, Y.
Mott, A.
Newman, H. B. ORCID icon
Rogan, C. ORCID icon
Shin, K.
Timciuc, V.
Traczyk, P.
Veverka, J.
Wilkinson, R.
Yang, Y.
Zhu, R. Y. ORCID icon
Spiropulu, M. ORCID icon
Dubinin, M.
Dias, F. A.
CMS Collaboration
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Abstract

A search for the standard model Higgs boson decaying into two Z bosons with subsequent decay into a final state containing two quark jets and two leptons, H → ZZ^(*) → qqℓ^−ℓ^+ is presented. Results are based on data corresponding to an integrated luminosity of 4.6 fb^(−1) of proton-proton collisions at √s=7 TeV, collected with the CMS detector at the LHC. In order to discriminate between signal and background events, kinematic and topological quantities, including the angular spin correlations of the decay products, are employed. Events are further classified according to the probability of the jets to originate from quarks of light or heavy flavor or from gluons. No evidence for the Higgs boson is found, and upper limits on its production cross section are determined for a Higgs boson of mass between 130 and 600 GeV.

Additional Information

© 2012 CERN, for the benet of the CMS collaboration This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Received: February 7, 2012. Accepted: March 8, 2012. Published: April 6, 2012. We wish to congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative staff at CERN and other CMS institutes, and acknowledge support from: FMSR (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON, RosAtom, RAS and RFBR (Russia); MSTD (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (U.S.A.). Individuals have received support from the Marie-Curie programme and the European Research Council (European Union); the Leventis Foundation; the A. P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the Council of Science and Industrial Research, India; and the HOMING PLUS programme of Foundation for Polish Science, conanced from European Union, Regional Development Fund.

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