- #1
ohwilleke
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The ATLAS experiment has seen a bump that could be a new particle at a mass of 3.0 TeV/c^2 with a local significance of more than three sigma, and a global significance of a bit more than two sigma in Run-2 data looking at decays of qqbb states to a W or Z boson and a Higgs boson.
It is possible to fit this into a "heavy vector boson" hypothesis (such as a W' or Z' model), but I think it is more likely to be a fluke, as it isn't very well motivated and has a low global significance. The preprint is as follows:
arXiv:1707.06958 [pdf, other]
Search for heavy resonances decaying to a W or Z boson and a Higgs boson in the qq¯(′)bb¯ final state in pp collisions at s√=13 TeV with the ATLAS detector
ATLAS Collaboration
Comments: Comments: 18 pages plus author list + cover pages (36 pages total), 5 figures, 4 tables, submitted to PLB, All figures including auxiliary figures are available at this https URL
Subjects: High Energy Physics - Experiment (hep-ex)
A search for heavy resonances decaying to a W or Z boson and a Higgs boson in the qq¯(′)bb¯ final state is described. The search uses 36.1 fb−1 of proton-proton collision data at s√= 13 TeV collected by the ATLAS detector at the CERN Large Hadron Collider in 2015 and 2016. The data are in agreement with the Standard Model expectations, with the largest excess found at a resonance mass of 3.0 TeV with a local (global) significance of 3.3 (2.1) σ. The results are presented in terms of constraints on a simplified model with a heavy vector triplet. Upper limits are set on the production cross-section times branching ratio for resonances decaying to a W (Z) boson and a Higgs boson, itself decaying to bb¯, in the mass range between 1.1 and 3.8 TeV; the limits range between 83 and 1.6 fb (77 and 1.1 fb) at 95% confidence level.
It is possible to fit this into a "heavy vector boson" hypothesis (such as a W' or Z' model), but I think it is more likely to be a fluke, as it isn't very well motivated and has a low global significance. The preprint is as follows:
arXiv:1707.06958 [pdf, other]
Search for heavy resonances decaying to a W or Z boson and a Higgs boson in the qq¯(′)bb¯ final state in pp collisions at s√=13 TeV with the ATLAS detector
ATLAS Collaboration
Comments: Comments: 18 pages plus author list + cover pages (36 pages total), 5 figures, 4 tables, submitted to PLB, All figures including auxiliary figures are available at this https URL
Subjects: High Energy Physics - Experiment (hep-ex)
A search for heavy resonances decaying to a W or Z boson and a Higgs boson in the qq¯(′)bb¯ final state is described. The search uses 36.1 fb−1 of proton-proton collision data at s√= 13 TeV collected by the ATLAS detector at the CERN Large Hadron Collider in 2015 and 2016. The data are in agreement with the Standard Model expectations, with the largest excess found at a resonance mass of 3.0 TeV with a local (global) significance of 3.3 (2.1) σ. The results are presented in terms of constraints on a simplified model with a heavy vector triplet. Upper limits are set on the production cross-section times branching ratio for resonances decaying to a W (Z) boson and a Higgs boson, itself decaying to bb¯, in the mass range between 1.1 and 3.8 TeV; the limits range between 83 and 1.6 fb (77 and 1.1 fb) at 95% confidence level.