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Search for a massive resonance decaying into a Higgs boson and a W or Z boson in hadronic final states in proton-proton collisions at sqrt(s) = 8 TeV

V. Khachatryan M. Besancon 1 F. Couderc 1 M. Dejardin 1 D. Denegri 1 B. Fabbro 1 J.L. Faure 1 C. Favaro 1 F. Ferri 1 S. Ganjour 1 A. Givernaud 1 P. Gras 1 G. Hamel De Monchenault 1 P. Jarry 1 E. Locci 1 J. Malcles 1 J. Rander 1 A. Rosowsky 1 M. Titov 1 A. Zghiche 1 S. Baffioni 2 F. Beaudette 2 P. Busson 2 L. Cadamuro 2 E. Chapon 2 C. Charlot 2 T. Dahms 2 O. Davignon 2 N. Filipovic 2 A. Florent 2 R. Granier De Cassagnac 2 L. Mastrolorenzo 2 P. Mine 2 I.N. Naranjo 2 M. Nguyen C. Ochando 2 G. Ortona 2 P. Paganini 2 S. Regnard 2 R. Salerno 2 J.B. Sauvan 2 Y. Sirois 2 T. Strebler 2 Y. Yilmaz 2 A. Zabi 2 J.-L. Agram 3 J. Andrea 3 A. Aubin 3 D. Bloch 3 J.-M. Brom 3 M. Buttignol 3 E.C. Chabert 3 N. Chanon 3 C. Collard 3 E. Conte 3 J.-C. Fontaine 3 D. Gele 3 U. Goerlach 3 C. Goetzmann 3 A.-C. Le Bihan 3 J.A. Merlin 3 K. Skovpen 3 P. Van Hove 3 S. Gadrat 4 S. Beauceron 5 N. Beaupere 5 C. Bernet 5 G. Boudoul 5 E. Bouvier 5 S. Brochet 5 C.A. Carrillo Montoya 5 J. Chasserat 5 R. Chierici 5 D. Contardo 5 B. Courbon 5 P. Depasse 5 H. El Mamouni 5 J. Fan 5 J. Fay 5 S. Gascon 5 M. Gouzevitch 5 B. Ille 5 I.B. Laktineh 5 M. Lethuillier 5 L. Mirabito 5 A.L. Pequegnot 5 S. Perries 5 J.D. Ruiz Alvarez 5 D. Sabes 5 L. Sgandurra 5 V. Sordini 5 M. Vander Donckt 5 P. Verdier 5 S. Viret 5 H. Xiao 5
Abstract : A search for a massive resonance decaying into a standard-model-like Higgs boson (H) and a W or Z boson is reported. The analysis is performed on a data sample corresponding to an integrated luminosity of 19.7 inverse femtobarns, collected in proton-proton collisions at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC. Signal events, in which the decay products of Higgs, W, or Z bosons at high Lorentz boost are contained within single reconstructed jets, are identified using jet substructure techniques, including the tagging of b hadrons. This is the first search for heavy resonances decaying into HW or HZ resulting in an all-jet final state, as well as the first application of jet substructure techniques to identify H to WW* to 4q decays at high Lorentz boost. No significant signal is observed and limits are set at 95% confidence level on the production cross section of W' and Z' in a model with mass-degenerate charged and neutral spin-1 resonances. Resonance masses are excluded for W' in the interval [1.0, 1.6] TeV, for Z' in the intervals [1.0, 1.1] and [1.3,1.5] TeV, and for mass-degenerate W' and Z' in the interval [1.0, 1.7] TeV.
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Submitted on : Tuesday, July 21, 2015 - 3:09:45 PM
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V. Khachatryan, M. Besancon, F. Couderc, M. Dejardin, D. Denegri, et al.. Search for a massive resonance decaying into a Higgs boson and a W or Z boson in hadronic final states in proton-proton collisions at sqrt(s) = 8 TeV. Journal of High Energy Physics, Springer Verlag (Germany), 2016, 1602, pp.145. ⟨10.1007/JHEP02(2016)145⟩. ⟨in2p3-01179045⟩



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