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 ATLAS collaboration
Eur.Phys.J. C78 (2018) 24, 2018

Abstract
A search for neutral heavy resonances is performed in the $WW\rightarrow e\nu \mu \nu $ decay channel using pp collision data corresponding to an integrated luminosity of $36.1\,\hbox {fb}^{-1}$ , collected at a centre-of-mass energy of 13 $\,\text {TeV}$ 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 $\sigma _X\times B(X \rightarrow WW)$ as a function of the resonance mass are obtained in the mass range between 200 $\,\text {GeV}$ and up to 5 $\,\text {TeV}$ 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.

  • Table 1

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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...

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