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Search for new resonances in $W\gamma$ and $Z\gamma$ Final States in $pp$ Collisions at $\sqrt{s}=8$ TeV with the ATLAS Detector

G. Aad 1 Z. Barnovska 2 N. Berger 2 M. Delmastro 2 L. Di Ciaccio 2 S. Elles 2 C. Goy 2 T. Hryn'Ova 2 S. Jézéquel 2 H. Keoshkerian 2 I. Koletsou 2 R. Lafaye 2 J. Leveque 2 V.P. Lombardo 2 N. Massol 2 H. Przysiezniak 2 G. Sauvage 2 E. Sauvan 2 M. Schwoerer 2 O. Simard 2 T. Todorov 2 I. Wingerter-Seez 2 S. Albrand 3 J. Brown 3 J. Collot 3 S. Crépé-Renaudin 3 B. Dechenaux 3 P.A. Delsart 3 C. Gabaldon 3 M.H. Genest 3 J.Y. Hostachy 3 F. Ledroit-Guillon 3 A. Lleres 3 A. Lucotte 3 F. Malek 3 C. Monini 3 J. Stark 3 B. Trocmé 3 M. Wu 3 D. Boumediene 4 Emmanuel Busato 4 D. Calvet 4 S. Calvet 4 J. Donini 4 E. Dubreuil 4 N. Ghodbane 4 G. Gilles 4 Ph. Gris 4 C. Guicheney 4 H. Liao 4 D. Pallin 4 Daniela Paredes Hernández 4 F. Podlyski 4 C. Santoni 4 Timothée Theveneaux-Pelzer 4 Loïc Valery 4 F. Vazeille 4 S. Abdel Khalek 5 A. Bassalat 5 C. Becot 5 S. Binet 5 C. Bourdarios 5 D. Charfeddine 5 J.B. de Vivie de Regie 5 L. Duflot 5 M. Escalier 5 L. Fayard 5 D. Fournier 5 J.-F. Grivaz 5 T. Guillemin 5 F. Hariri 5 S. Henrot-Versillé 5 J. Hrivnac 5 L. Iconomidou-Fayard 5 M. Kado 5 A. Lounis 5 N. Makovec 5 L. Poggioli 5 P. Puzo 5 A. Renaud 5 D. Rousseau 5 G. Rybkin 5 A.C. Schaffer 5 E. Scifo 5 L. Serin 5 S. Simion 5 R. Tanaka 5 H.L. Tran 5 D. Zerwas 5 Z. Zhang 5 L. Alio 1 M. Barbero 1 C. Bertella 1 J. C. Clémens 1 Y. Coadou 1 S. Diglio 1 F. Djama 1 L. Feligioni 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 N. Tannoury 1 E. Tiouchichine 1 S. Tisserant 1 J. Toth 1 F. Touchard 1 M. Ughetto 1 L. Vacavant 1
Abstract : This letter presents a search for new resonances decaying to final states with a vector boson produced in association with a high transverse momentum photon, $V\gamma$, with $V= W(\rightarrow \ell \nu)$ or $Z(\rightarrow \ell^{+} \ell^{-})$, where $\ell = e$ or $\mu$. The measurements use 20.3 fb$^{-1}$ of proton-proton collision data at a center-of-mass energy of $\sqrt{s}=8$ TeV recorded with the ATLAS detector. No deviations from the Standard Model expectations are found, and production cross section limits are set at 95% confidence level. Masses of the hypothetical $a_{T}$ and $\omega_{T}$ states of a benchmark Low Scale Technicolor model are excluded in the ranges [275,960] GeV and $[200,700]\cup[750,890]$ GeV, respectively. Limits at 95% confidence level on the production cross section of a singlet scalar resonance decaying to $Z\gamma$ final states have also been obtained for masses below 1180 GeV.
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Submitted on : Friday, August 1, 2014 - 10:11:01 AM
Last modification on : Thursday, November 26, 2020 - 3:39:06 PM

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G. Aad, Z. Barnovska, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. Search for new resonances in $W\gamma$ and $Z\gamma$ Final States in $pp$ Collisions at $\sqrt{s}=8$ TeV with the ATLAS Detector. Physics Letters B, Elsevier, 2014, 738, pp.428-447. ⟨10.1016/j.physletb.2014.10.002⟩. ⟨in2p3-01053685⟩

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