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Search for a Higgs boson decaying into a Z and a photon in pp collisions at sqrt(s) = 7 and 8 TeV

S. Chatrchyan M. Besançon 1 F. Couderc 1 M. Dejardin 1 D. Denegri 1 B. Fabbro 1 J.L. Faure 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 L. Millischer 1 A. Nayak 1 J. Rander 1 A. Rosowsky 1 M. Titov 1 S. Baffioni 2 F. Beaudette 2 L. Benhabib 2 M. Bluj 2 Pierre Busson 2 C. Charlot 2 N. Daci 2 T. Dahms 2 M. Dalchenko 2 L. Dobrzynski 2 A. Florent 2 R. Granier de Cassagnac 2 M. Haguenauer 2 P. Mine 2 C. Mironov 2 I.N. Naranjo 2 M. Nguyen 2 C. Ochando 2 P. Paganini 2 D. Sabes 2 R. Salerno 2 Y. Sirois 2 C. Veelken 2 A. Zabi 2 J.-L. Agram 3 J. Andrea 3 D. Bloch 3 J.-M. Brom 3 E.C. Chabert 3 C. Collard 3 E. Conte 3 F. Drouhin 3 J.-C. Fontaine 3 D. Gele 3 U. Goerlach 3 C. Goetzmann 3 P. Juillot 3 A.-C. Le Bihan 3 P. van Hove 3 S. Gadrat 4 S. Beauceron 5 N. Beaupere 5 G. Boudoul 5 S. Brochet 5 J. Chasserat 5 R. Chierici 5 D. Contardo 5 P. Depasse 5 H. El Mamouni 5 J. Fay 5 S. Gascon 5 M. Gouzevitch 5 B. Ille 5 T. Kurca 5 M. Lethuillier 5 L. Mirabito 5 S. Perries 5 L. Sgandurra 5 V. Sordini 5 M. Vander Donckt 5 P. Verdier 5 S. Viret 5 
Abstract : A search for a Higgs boson decaying into a Z boson and a photon is described. The analysis is performed using proton-proton collision datasets recorded by the CMS detector at the LHC. Events were collected at center-of-mass energies of 7 TeV and 8 TeV, corresponding to integrated luminosities of 5.0 and 19.6 inverse femtobarns, respectively. The selected events are required to have opposite-sign electron or muon pairs with an invariant mass greater than 50 GeV. No excess above standard model predictions has been found in the 120-160 GeV mass range and the first limits on the Higgs boson production cross section times the H to Z gamma branching fraction at the LHC have been derived. The observed limits are between about 4 and 25 times the standard model cross section times the branching fraction. The observed and expected limits for m[ll gamma]at 125 GeV are within one order of magnitude of the standard model prediction.
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Submitted on : Tuesday, July 23, 2013 - 7:33:43 AM
Last modification on : Monday, March 28, 2022 - 9:39:18 AM

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S. Chatrchyan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Search for a Higgs boson decaying into a Z and a photon in pp collisions at sqrt(s) = 7 and 8 TeV. Physics Letters B, Elsevier, 2013, 726, pp.587-609. ⟨10.1016/j.physletb.2013.09.057⟩. ⟨in2p3-00847192⟩

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