Abstract
Results are presented from a search in the dijet final state for new massive narrow resonances decaying to pairs of W and Z bosons or to a W/Z boson and a quark. Results are based on data recorded in proton-proton collisions at s=13 TeV with the CMS detector at the CERN LHC. The data correspond to an integrated luminosity of 35.9 fb−1. The mass range investigated extends upwards from 1.2 TeV. No excess is observed above the estimated standard model background and limits are set at 95% confidence level on cross sections, which are interpreted in terms of various models that predict gravitons, heavy spin-1 bosons, and excited quarks. In a heavy vector triplet model, W′ and Z′ resonances, with masses below 3.2 and 2.7 TeV, respectively, and spin-1 resonances with degenerate masses below 3.8 TeV are excluded at 95% confidence level. In the case of a singlet W′ resonance masses between 3.3 and 3.6 TeV can be excluded additionally. Similarly, excited quark resonances, q*, decaying to qW and qZ with masses less than 5.0 and 4.7 TeV, respectively, are excluded. In a narrow-width bulk graviton model, upper limits are set on cross sections ranging from 0.6 fb for high resonance masses above 3.6 TeV, to 36.0 fb for low resonance masses of 1.3 TeV.1 MoreReceived 17 August 2017DOI:https://doi.org/10.1103/PhysRevD.97.072006Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.© 2018 CERN, for the CMS CollaborationPhysics Subject Headings (PhySH)Research AreasExtensions of fermion sectorExtensions of gauge sectorParticles & Fields
Highlights
The standard model (SM) of particle physics describes with high accuracy a multitude of experimental and observational data
This paper presents a search for narrow resonances with W or Z bosons decaying hadronically at resonance masses larger than 1.2 TeV
We evaluate the influence of uncertainties in the parton distribution functions (PDF) and the choice of factorization and renormalization scales on the signal cross section and acceptance by considering differences in the predicted kinematics of the resonance
Summary
The standard model (SM) of particle physics describes with high accuracy a multitude of experimental and observational data. The SM does not accommodate phenomena such as gravity or dark matter and dark energy inferred from cosmological observations, prompting theoretical work on its extensions Theories that address these shortcomings commonly predict new particles, which can potentially be observed at the CERN LHC. Models in which these new particles decay to VV or qV, where V denotes either a W or a Z boson, are considered in this work. We consider final states produced when a VV boson pair decays into four quarks or qV decays into three quarks, and each boson is reconstructed as a single jet, resulting in events with two reconstructed jets (dijet channel). Compared to the previous measurement [17], this analysis profits from an increase in integrated luminosity of more than a factor of 13 and uses improved substructure variables
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