Multiboson production in W ′ decays

Aguilar-Saavedra, J. A.; Joaquim, F. R.

doi:10.1007/jhep01(2016)183

Cited by 35 publications

(22 citation statements)

References 115 publications

(164 reference statements)

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“…Nevertheless, the combination with other LHC excesses around the resonant mass M ≈ 2 TeV provides motivation to explore the observed excess despite its insufficient significance. Other analyses in the context of LRSMs were performed in [40,[42][43][44][45][46][47]. The excess has also been discussed in wider theoretical contexts [48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65].…”

Section: Lhc Signatures a Experimental Picturementioning

confidence: 99%

Reconciling the 2 TeV excesses at the LHC in a linear seesaw left-right model

et al. 2016

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We interpret the 2 TeV excesses at the LHC in a left-right symmetric model with Higgs doublets and spontaneous D-parity violation. The light neutrino masses are understood via a linear seesaw, suppressed by a high D-parity breaking scale, and the heavy neutrinos have a pseudo-Dirac character. In addition, with a suppressed right-handed gauge coupling gR/gL ≈ 0.6 in an SO(10) embedding, we can thereby interpret the observed eejj excess at CMS. We show that it can be reconciled with the diboson and dijet excesses within a simplified scenario based on our model. Moreover, we find that the mixing between the light and heavy neutrinos can be potentially large which would induce dominant non-standard contributions to neutrinoless double beta decay via long-range λ and η neutrino exchange.

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Section: Lhc Signatures a Experimental Picturementioning

confidence: 99%

Reconciling the 2 TeV excesses at the LHC in a linear seesaw left-right model

et al. 2016

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“…Spin-0 explanations are discussed in context of a Higgs singlet [36], a two Higgs doublet model [37][38][39][40], sparticles [41,42] or composite scalars [43,44]. Spin-1 proposals include composite vector resonances [45][46][47][48][49][50][51][52], generic and effective field theory (EFT) models [53][54][55][56] as well as heavy W resonances [22][23][24][25][57][58][59][60][61][62][63][64][65][66][67][68][69], Z resonances [26,[70][71][72][73][74][75][76] or both [77][78][79]…”

Section: Jhep09(2016)036mentioning

confidence: 99%

Angular observables for spin discrimination in boosted diboson final states

Buschmann¹,

Yu²

2016

J. High Energ. Phys.

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We investigate the prospects for spin determination of a heavy diboson resonance using angular observables. Focusing in particular on boosted fully hadronic final states, we detail both the differences in signal efficiencies and distortions of differential distributions resulting from various jet substructure techniques. We treat the 2 TeV diboson excess as a case study, but our results are generally applicable to any future discovery in the diboson channel. Scrutinizing ATLAS and CMS analyses at 8 TeV and 13 TeV, we find that the specific cuts employed in these analyses have a tremendous impact on the discrimination power between different signal hypotheses. We discuss modified cuts that can offer a significant boost to spin sensitivity in a post-discovery era. Even without altered cuts, we show that CMS, and partly also ATLAS, will be able to distinguish between spin 0, 1, or 2 new physics diboson resonances at the 2σ level with 30 fb −1 of 13 TeV data, for our 2 TeV case study.

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“…This provides additional motivation to explore the observed excess despite its insufficient significance. Other analyses in the context of LRSMs were performed in [41,42]. The excess has also been discussed in other theoretical contexts [71][72][73][74][75].…”

Section: Collider Signaturesmentioning

confidence: 99%

“…Consequently, the heavy RH states can all be as light as the TeV scale. Moreover, the suppressed gauge coupling g R allows us to interpret an excess of events observed in the range of 1.9 TeV to 2.4 TeV by the CMS group [39] at LHC as the signature of a right handed gauge boson of LRSMs with spontaneous D parity breaking as pointed out in [40] and in subsequent works [41,42].…”

Section: Introductionmentioning

confidence: 99%

Double beta decay, lepton flavor violation, and collider signatures of left-right symmetric models with spontaneousD-parity breaking

et al. 2015

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We propose a class of left-right symmetric models (LRSMs) with spontaneous D parity breaking, where SU (2)R breaks at the TeV scale while discrete left-right symmetry breaks around 10 9 GeV. By embedding this framework in a non-supersymmetric SO(10) Grand Unified Theory (GUT) with Pati-Salam symmetry as the highest intermediate breaking step, we obtain gR/gL ≈ 0.6 between the right-and left-handed gauge couplings at the TeV scale. This leads to a suppression of beyond the Standard Model phenomena induced by the right-handed gauge coupling. Here we focus specifically on the consequences for neutrinoless double beta decay, low energy lepton flavour violation and LHC signatures due to the suppressed right handed currents. Interestingly, the reduced gR allows us to interpret an excess of events observed recently in the range of 1.9 TeV to 2.4 TeV by the CMS group at the LHC as the signature of a right handed gauge boson in LRSMs with spontaneous D parity breaking. Moreover, the reduced right-handed gauge coupling also strongly suppresses the non-standard contribution of heavy states to the neutrinoless double beta decay rate as well as the amplitude of low energy lepton flavour violating processes. In a dominant type-II Seesaw mechanism of neutrino mass generation, we find that both sets of observables provide stringent and complimentary bounds which make it challenging to observe the scenario at the LHC.

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Multiboson production in W ′ decays

Cited by 35 publications

References 115 publications

Reconciling the 2 TeV excesses at the LHC in a linear seesaw left-right model

Reconciling the 2 TeV excesses at the LHC in a linear seesaw left-right model

Angular observables for spin discrimination in boosted diboson final states

Double beta decay, lepton flavor violation, and collider signatures of left-right symmetric models with spontaneousD-parity breaking

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