Abstract
We show that the relatively small but coincident excesses observed around 2 TeV in the ATLAS Run 1 and Run 2 hadronic diboson searches — when a cut on the number of tracks in the fat jets is not applied — and the null results of all remaining high-mass diboson searches are compatible with the decay of a triboson resonance R into WZ plus an extra particle X. These decays can take place via new neutral (Y 0) or charged (Y ±) particles, namely R → Y 0 W, with Y 0 → ZX, or R → Y ± Z, with Y ± → WX. An obvious candidate for such intermediate particle is a neutral one Y 0, given a 3.9σ excess found at 650 GeV by the CMS Collaboration in searches for intermediate mass diboson resonances decaying to ZV, with V = W, Z. We discuss discovery strategies for triboson resonances with small modifications of existing hadronic searches.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
ATLAS collaboration, Search for high-mass diboson resonances with boson-tagged jets in proton-proton collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, JHEP 12 (2015) 055 [arXiv:1506.00962] [INSPIRE].
CMS collaboration, Search for massive resonances in dijet systems containing jets tagged as W or Z boson decays in pp collisions at \( \sqrt{s}=8 \) TeV, JHEP 08 (2014) 173 [arXiv:1405.1994] [INSPIRE].
ATLAS collaboration, Search for production of WW/WZ resonances decaying to a lepton, neutrino and jets in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Eur. Phys. J. C 75 (2015) 209 [Erratum ibid. C 75 (2015) 370] [arXiv:1503.04677] [INSPIRE].
ATLAS collaboration, Search for resonant diboson production in the \( \ell \ell q\overline{q} \) final state in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Eur. Phys. J. C 75 (2015) 69 [arXiv:1409.6190] [INSPIRE].
CMS collaboration, Search for massive resonances decaying into pairs of boosted bosons in semi-leptonic final states at \( \sqrt{s}=8 \) TeV, JHEP 08 (2014) 174 [arXiv:1405.3447] [INSPIRE].
J.A. Aguilar-Saavedra, Triboson interpretations of the ATLAS diboson excess, JHEP 10 (2015) 099 [arXiv:1506.06739] [INSPIRE].
J.A. Aguilar-Saavedra and F.R. Joaquim, Multiboson production in W′ decays, JHEP 01 (2016) 183 [arXiv:1512.00396] [INSPIRE].
ATLAS collaboration, Search for WW/WZ resonance production in the ℓνqq final state at \( \sqrt{s}=13 \) TeV with the ATLAS detector at the LHC, ATLAS-CONF-2015-075 (2015).
ATLAS collaboration, Search for diboson resonances in the llqq final state in pp collisions at \( \sqrt{s}=13 \) TeV with the ATLAS detector, ATLAS-CONF-2015-071 (2015).
ATLAS collaboration, Search for diboson resonances in the ννqq final state in pp collisions at \( \sqrt{s}=13 \) TeV with the ATLAS detector, ATLAS-CONF-2015-068 (2015).
CMS collaboration, Search for massive resonances decaying into pairs of boosted W and Z bosons at \( \sqrt{s}=13 \) TeV, CMS-PAS-EXO-15-002 (2015).
ATLAS collaboration, Search for resonances with boson-tagged jets in 3.2 fb −1 of pp collisions at \( \sqrt{s}=13 \) TeV collected with the ATLAS detector, ATLAS-CONF-2015-073 (2015).
CMS collaboration, Search for diboson resonances in the semileptonic X → ZV → ℓ + ℓ − \( \mathrm{q}\overline{\mathrm{q}} \) final state at \( \sqrt{s}=13 \) TeV with CMS, CMS-PAS-B2G-16-010 (2016).
Y.L. Dokshitzer, G.D. Leder, S. Moretti and B.R. Webber, Better jet clustering algorithms, JHEP 08 (1997) 001 [hep-ph/9707323] [INSPIRE].
M. Cacciari, G.P. Salam and G. Soyez, The anti-k t jet clustering algorithm, JHEP 04 (2008) 063 [arXiv:0802.1189] [INSPIRE].
J.M. Butterworth, A.R. Davison, M. Rubin and G.P. Salam, Jet substructure as a new Higgs search channel at the LHC, Phys. Rev. Lett. 100 (2008) 242001 [arXiv:0802.2470] [INSPIRE].
A.J. Larkoski, I. Moult and D. Neill, Power Counting to Better Jet Observables, JHEP 12 (2014) 009 [arXiv:1409.6298] [INSPIRE].
Additional results in https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2013-08/#auxstuff.
CMS collaboration, Search for heavy neutrinos and W bosons with right-handed couplings in proton-proton collisions at \( \sqrt{s}=8 \) TeV, Eur. Phys. J. C 74 (2014) 3149 [arXiv:1407.3683] [INSPIRE].
A. Martin and T.S. Roy, Cautionary tale of mismeasured tails from q/g bias, Phys. Rev. D 94 (2016) 014003 [arXiv:1604.05728] [INSPIRE].
ATLAS collaboration, Light-quark and gluon jet discrimination in pp collisions at \( \sqrt{s}=7 \) TeV with the ATLAS detector, Eur. Phys. J. C 74 (2014) 3023 [arXiv:1405.6583] [INSPIRE].
J. Alwall et al., The automated computation of tree-level and next-to-leading order differential cross sections and their matching to parton shower simulations, JHEP 07 (2014) 079 [arXiv:1405.0301] [INSPIRE].
T. Sjöstrand, S. Mrenna and P.Z. Skands, A Brief Introduction to PYTHIA 8.1, Comput. Phys. Commun. 178 (2008) 852 [arXiv:0710.3820] [INSPIRE].
DELPHES 3 collaboration, J. de Favereau et al., DELPHES 3, A modular framework for fast simulation of a generic collider experiment, JHEP 02 (2014) 057 [arXiv:1307.6346] [INSPIRE].
M. Cacciari, G.P. Salam and G. Soyez, FastJet User Manual, Eur. Phys. J. C 72 (2012) 1896 [arXiv:1111.6097] [INSPIRE].
J.A. Aguilar-Saavedra, PROTOS, a PROgram for TOp Simulations, http://jaguilar.web.cern.ch/jaguilar/protos/.
ATLAS collaboration, Search for new resonances decaying to a W or Z boson and a Higgs boson in the \( {\ell}^{+}{\ell}^{-}b\overline{b} \) , \( \ell \nu b\overline{b} \) and \( \nu \overline{\nu}b\overline{b} \) channels with pp collisions at \( \sqrt{s}=13 \) TeV with the ATLAS detector, arXiv:1607.05621 [INSPIRE].
J.H. Collins and W.H. Ng, A 2 TeV W R , supersymmetry and the Higgs mass, JHEP 01 (2016) 159 [arXiv:1510.08083] [INSPIRE].
M. Buen-Abad, A.G. Cohen and M. Schmaltz, A model for the LHC diboson excess, JHEP 05 (2016) 111 [arXiv:1604.03578] [INSPIRE].
ATLAS collaboration, Identification of boosted, hadronically-decaying W and Z bosons in \( \sqrt{s}=13 \) TeV Monte Carlo Simulations for ATLAS, ATL-PHYS-PUB-2015-033 (2015).
ATLAS collaboration, Searches for heavy diboson resonances in pp collisions at \( \sqrt{s}=13 \) TeV with the ATLAS detector, arXiv:1606.04833 [INSPIRE].
ATLAS collaboration, A Search for Resonances Decaying to a W or Z Boson and a Higgs Boson in the \( q{\overline{q}}^{\left(\prime \right)}b\overline{b} \) Final State, ATLAS-CONF-2016-083 (2016).
Open Access
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1607.08911
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
About this article
Cite this article
Aguilar-Saavedra, J.A., Collins, J.H. & Lombardo, S. Traces of a triboson resonance. J. High Energ. Phys. 2016, 50 (2016). https://doi.org/10.1007/JHEP09(2016)050
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP09(2016)050