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Search for Scalar Diphoton Resonances in the Mass Range $65-600$ GeV with the ATLAS Detector in $pp$ Collision Data at $\sqrt{s}$ = 8 $TeV$

G. Aad 1 L. Alio 1 M. Barbero 1 J. C. Clémens 1 Y. Coadou 1 S. Diglio 1 F. Djama 1 L. Feligioni 1 G. Hallewell 1 D. Hoffmann 1 F. Hubaut 1 E. B. F. G. Knoops 1 E. Le Guirriec 1 B. Li 1 D. Madaffari 1 K. Mochizuki 1 E. Monnier 1 S. Muanza 1 Y. Nagai 1 P. Pralavorio 1 A. Rozanov 1 T. Serre 1 M. Talby 1 E. Tiouchichine 1 S. Tisserant 1 J. Toth 1 F. Touchard 1 M. Ughetto 1 L. Vacavant 1 D. Boumediene 2 Emmanuel Busato 2 D. Calvet 2 S. Calvet 2 J. Donini 2 E. Dubreuil 2 N. Ghodbane 2 G. Gilles 2 Ph. Gris 2 C. Guicheney 2 H. Liao 2 D. Pallin 2 Daniela Paredes Hernández 2 F. Podlyski 2 C. Santoni 2 Timothée Theveneaux-Pelzer 2 Loïc Valery 2 F. Vazeille 2 T. Beau 3 M. Bomben 3 G. Calderini 3 F. Crescioli 3 O. Davignon 3 S. de Cecco 3 A. Demilly 3 F. Derue 3 P. Francavilla 3 M.W. Krasny 3 D. Lacour 3 B. Laforge 3 S. Laplace 3, 4 O. Le Dortz 3 G. Lefebvre 3 B. Malaescu 3, 4 G. Marchiori 3 I. Nikolic-Audit 3 J. Ocariz 3 S. Pires 5 M. Ridel 3 L. Roos 3 S. Trincaz-Duvoid 3 F. Vannucci 3 D. Varouchas 3 H. Bachaou 5 F. Balli 5 F. Bauer 5 N. Besson 5 J.-B. Blanchard 5 M. Boonekamp 5 A. Calandri 5 L. Chevalier 5 M. Dano Hoffmann 5 F. Deliot 5 J. Ernwein 5 A.I. Etienvre 6 A. Formica 5 P.F. Giraud 5 J. Goncalves Pinto Firmino da Costa 5 C. Guyot 5 R. Hanna 5 S. Hassani 5 W. Kozanecki 5 E. Lancon 5 J.F. Laporte 5 C. Maiani 5 P. Mal 5 B. Mansoulie 5 H. Martinez 2 N. Meric 5 J.-P. Meyer 5 R. Nicolaidou 5 A. Ouraou 5 E. Protopapadaki 5 C.R. Royon 5 L. L. Schoffel 5 Ph. Schune 5 Ph. Schwemling 5 J. Schwindling 5 D. Tsionou 5 N. Vranjes 5 M. Xiao 5 G. Rahal 6 S. Abdel Khalek 4 A. Bassalat 4 C. Becot 4 S. Binet 4 C. Bourdarios 4 D. Charfeddine 4 J.B. de Vivie de Regie 4 L. Duflot 4 M. Escalier 4 L. Fayard 4 D. Fournier 4 J.-F. Grivaz 4 T. Guillemin 4 F. Hariri 4 S. Henrot-Versillé 4 J. Hrivnac 4 L. Iconomidou-Fayard 4 M. Kado 4 A. Lounis 4 N. Makovec 4 L. Poggioli 4 P. Puzo 4 A. Renaud 4 D. Rousseau 4 G. Rybkin 4 A.C. Schaffer 4 E. Scifo 4 L. Serin 4 S. Simion 4 R. Tanaka 4 H.L. Tran 4 D. Zerwas 4 Zhiqing Zhang 4 N. Berger 7 M. Delmastro 7 L. Di Ciaccio 7 T.K.O. Doan 7 S. Elles 7 C. Goy 7 T. Hryn'Ova 7 S. Jézéquel 7 H. Keoshkerian 7 I. Koletsou 7 R. Lafaye 7 J. Leveque 7 V.P. Lombardo 7 N. Massol 7 H. Przysiezniak 7 G. Sauvage 7 E. Sauvan 7 M. Schwoerer 7 O. Simard 7 T. Todorov 7 I. Wingerter-Seez 7 S. Albrand 8 J. Brown 8 J. Collot 8 S. Crépé-Renaudin 8 B. Dechenaux 8 P.A. Delsart 8 C. Gabaldon 8 M.H. Genest 8 J.Y. Hostachy 8 F. Ledroit-Guillon 8 A. Lleres 8 A. Lucotte 8 F. Malek 8 C. Monini 8 J. Stark 8 B. Trocmé 8 M. Wu 8
Abstract : A search for scalar particles decaying via narrow resonances into two photons in the mass range $65-600$ GeV is performed using 20.3 fb$^{-1}$ of $\sqrt{s}$ = 8 TeV $pp$ collision data collected with the ATLAS detector at the Large Hadron Collider. The recently discovered Higgs boson is treated as a background. No significant evidence for an additional signal is observed. The results are presented as limits at the 95 % confidence level on the production cross-section of a scalar boson times branching ratio into two photons, in a fiducial volume where the reconstruction efficiency is approximately independent of the event topology. The upper limits set extend over a considerably wider mass range than previous searches.
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Submitted on : Friday, July 25, 2014 - 8:52:42 AM
Last modification on : Tuesday, December 1, 2020 - 2:32:13 PM

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G. Aad, L. Alio, M. Barbero, J. C. Clémens, Y. Coadou, et al.. Search for Scalar Diphoton Resonances in the Mass Range $65-600$ GeV with the ATLAS Detector in $pp$ Collision Data at $\sqrt{s}$ = 8 $TeV$. Physical Review Letters, American Physical Society, 2014, 113, pp.171801. ⟨10.1103/PhysRevLett.113.171801⟩. ⟨in2p3-01048570⟩

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