A model for the LHC diboson excess

Abstract

The first run of the LHC showed hints of a new resonance with mass near $1.9$ TeV decaying into electroweak gauge boson pairs as well as into dijets. While Run 2 has neither confirmed nor ruled out such a resonance, it has yielded new constraints on models attempting to explain these decays. Additionally in $W^{\prime }$ models where this new resonance is a charged vector boson that is a weak isospin singlet there is the potential for conflict with the electroweak precision $T$ parameter. We construct variants of a $W^{\prime }$ resonance model that provide an excellent fit to both Run 1 and Run 2 data, as well as electroweak precision measurements. The model also predicts a neutral vector boson, a $Z^{\prime }$, with mass close to $3$ TeV. This $Z^{\prime }$ is compatible with the intriguing Run 2 observation of a dielectron pair with invariant mass of $2.9$ TeV at CMS.

References in corpus (14)

• Parton distributions for the LHC
• Search for high-mass dilepton resonances in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Search for new phenomena in the dijet mass distribution using $p-p$ collision data at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for resonances and quantum black holes using dijet mass spectra in proton-proton collisions at sqrt(s) = 8 TeV
• Search for narrow resonances decaying to dijets in proton-proton collisions at sqrt(s) = 13 TeV
• Search for New Phenomena in Dijet Mass and Angular Distributions from $pp$ Collisions at $\sqrt{s}$ = 13 TeV with the ATLAS Detector
• Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at sqrt(s) = 8 TeV
• Search for massive resonances in dijet systems containing jets tagged as W or Z boson decays in pp collisions at sqrt(s) = 8 TeV
• Search for massive resonances decaying into pairs of boosted bosons in semi-leptonic final states at sqrt(s) = 8 TeV
• Search for resonant diboson production in the $\ell \ell q\bar{q}$ final state in pp collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Discovery and Identification of W' and Z' in SU(2) x SU(2) x U(1) Models at the LHC
• Search for massive WH resonances decaying into the l nu b anti-b final state at sqrt(s) = 8 TeV
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• The Diboson Excess: Experimental Situation and Classification of Explanations; A Les Houches Pre-Proceeding

Cited by in corpus (1)

• Traces of a triboson resonance