Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at $$ sqrt{s}=13 $$ TeV

Abstract

Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √ s = 13 TeVThe CMS Collaboration * AbstractA search for a new scalar resonance decaying to a pair of Z bosons is performed in the mass range from 130 GeV to 3 TeV, and for various width scenarios. The analysis is based on proton-proton collisions recorded by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb −1 at a center-of-mass energy of 13 TeV. The Z boson pair decays are reconstructed using the 4 , 2 2q, and 2 2ν final states, where = e or µ. Both gluon fusion and electroweak production of the scalar resonance are considered, with a free parameter describing their relative cross sections. A dedicated categorization of events, based on the kinematic properties of associated jets, and matrix element techniques are employed for an optimal signal and background separation. A description of the interference between signal and background amplitudes for a resonance of an arbitrary width is included. No significant excess of events with respect to the standard model expectation is observed and limits are set on the product of the cross section for a new scalar boson and the branching fraction for its decay to ZZ for a large range of masses and widths.

Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state

“…Many of the technical details of the search for a scalar resonance X → ZZ at high mass in Run 2 data, documented in Ref. [37], are also shared in the analyses presented here. The rest of the paper is organized as follows.…”

Probing pseudo-Goldstone dark matter at the LHC

“…• Searches for h 2 → W W and h 2 → ZZ in ATLAS [35][36][37] and CMS [38]. The CMS h 2 → ZZ search [38] probes the lowest mass range: m h2 ≥ 130GeV. The ATLAS h 2 → W W and h 2 → ZZ searches are sensitive to masses above 200 GeV.…”

Searching for dark photons with maverick top partners

“…• Scalar: The addition of a new scalar shifts Higgs boson couplings away from SM predictions, as well as contributing to new loop contributions to EW precision parameters. Additionally, many searches have been performed for new scalar production at the LHC [62][63][64][65][66][67][68] as well as at LEP [69][70][71]. However, the most stringent constraints [72] come from precision measurements of the observed M 1 = 125 GeV Higgs boson for M 1 M 2 650 GeV and precision W -mass constraints [51,52,73] for 650 GeV M 2 1 TeV.…”