Search for heavy resonances decaying into $WW$ in the $e\nu\mu\nu$ final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

The collaboration
Eur.Phys.J.C 78 (2018) 24, 2018.

Abstract
A search for neutral heavy resonances is performed in the $WW\to e\nu\mu\nu$ decay channel using $pp$ collision data corresponding to an integrated luminosity of 36.1 fb$^{-1}$, collected at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. No evidence of such heavy resonances is found. In the search for production via the quark--antiquark annihilation or gluon--gluon fusion process, upper limits on $\sigma_X \times B(X \to WW)$ as a function of the resonance mass are obtained in the mass range between 200 GeV and up to 5 TeV for various benchmark models: a Higgs-like scalar in different width scenarios, a two-Higgs-doublet model, a heavy vector triplet model, and a warped extra dimensions model. In the vector-boson fusion process, constraints are also obtained on these resonances, as well as on a Higgs boson in the Georgi--Machacek model and a heavy tensor particle coupling only to gauge bosons.

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Figure 1, left, subfigure a, Acceptance times efficiency as a function of signal mass for the ggF or qqA production....

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Figure 1, right, subfigure b, Acceptance times efficiency as a function of signal mass for the VBF production. The "0"...

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Figure 2, left, subfigure a, Transverse mass distribution in the ggF top-quark control regions. For NWA signals, the "0" value...

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Figure 2, right, subfigure b, Transverse mass distribution in the VBF top-quark control regions. For NWA signals, the "0" value...

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Figure 3, left, subfigure a, Transverse mass distribution in the quasi-inclusive ggF WW control regions. The "0" value means lack...

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Figure 3, right, subfigure b, Transverse mass distribution in the quasi-inclusive VBF1Jet WW control regions. The "0" value means lack...

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Figure 4, top left, subfigure a, post-fit distributions of the transverse mass mT in the ggF Signal region. The "0"...

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Figure 4, top right, subfigure b, post-fit distributions of the transverse mass mT in the VBF1Jet Signal region. The "0"...

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Figure 4, bottom, subfigure c, post-fit distributions of the transverse mass mT in the VBF2Jet Signal region. The "0" value...

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Figure 5, left, subfigur a, Upper limits at 95% CL on the Higgs boson production cross section times branching fraction...

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Figure 5, right, subfigure b, Upper limits at 95% CL on the Higgs boson production cross section times branching fraction...

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Figure 6, Upper limits at 95% CL on the total ggF and VBF Higgs boson production cross section times branching...

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Figure 9, top left, subfigure a, Upper limits at 95% CL on the Higgs boson production cross section times branching...

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Figure 9, top right, subfigure b, Upper limits at 95% CL on the Higgs boson production cross section times branching...

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Figure 10, left, subfigure a, Upper limits at 95% CL on the resonance production cross section times branching fraction for...

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Figure 11, left, subfigure a, Upper limits at 95% CL on the resonance production cross section times branching fraction for...

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Figure 11, right, subfigure b, Upper limits at 95% CL on the resonance production cross section times branching fraction for...

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Figure 12, bottom, subfigure c, Upper limits at 95% CL on the resonance production cross section times branching fraction for...

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Figure 12, top right, subfigure b, Upper limits at 95% CL on the resonance production cross section times branching fraction...

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Figure 12, top left, subfigure a, Upper limits at 95% CL on the resonance production cross section times branching fraction...

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Auxiliary material Figure 2e, Event selection efficiencies in the VBF2J event categories as a function of the signal mass for...

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Auxiliary material Figure 2f, Event selection efficiencies in the VBF2J event categories for different kinds of VBF signals production. The...

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Auxiliary material Figure 2c, Event selection efficiencies in the VBF1J event categories as a function of the signal mass for...

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Auxiliary material Figure 2d, Event selection efficiencies in the VBF1J event categories for different kinds of VBF signals production. The...

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Auxiliary material Figure 2a, Event selection efficiencies in the ggF event categories as a function of the signal mass for...

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Auxiliary material Figure 2b, Event selection efficiencies in the ggF event categories for different kinds of VBF signals production. The...

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Auxiliary material Figure 6a, Upper limits at 95% CL on the Higgs production cross section times branching fraction in the...

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Auxiliary material Figure 6c, Upper limits at 95% CL on the Higgs production cross section times branching fraction in the...

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Auxiliary material Figure 6b, Upper limits at 95% CL on the Higgs production cross section times branching fraction in the...

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Auxiliary material Figure 6d, Upper limits at 95% CL on the Higgs production cross section times branching fraction in the...

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Auxiliary material Figure 7b, Upper limits at 95% CL on the total ggF and VBF Higgs production cross section times...

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Auxiliary material Figure 7a, Upper limits at 95% CL on the total ggF and VBF Higgs production cross section times...