Yazar "Ambrogi, E." seçeneğine göre listele

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    Öğe
    Search for heavy resonances that decay into a vector boson and a Higgs boson in hadronic final states at ?s=13TeV
    (Springer, 2017) Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, E.; Asilar, E.; Bergauer, T.; The CMS Collaboration
    A search for heavy resonances with masses above 1 TeV, decaying to final states containing a vector boson and a Higgs boson, is presented. The search considers hadronic decays of the vector boson, and Higgs boson decays to b quarks. The decay products are highly boosted, and each collimated pair of quarks is reconstructed as a single, massive jet. The analysis is performed using a data sample collected in 2016 by the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1). The data are consistent with the background expectation and are used to place limits on the parameters of a theoretical model with a heavy vector triplet. In the benchmark scenario with mass-degenerate W' and Z' bosons decaying predominantly to pairs of standard model bosons, for the first time heavy resonances for masses as high as 3.3 TeV are excluded at 95% confidence level, setting the most stringent constraints to date on such states decaying into a vector boson and a Higgs boson.
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    Öğe
    Search for new physics in events with a leptonically decaying Z boson and a large transverse momentum imbalance in proton-proton collisions at ?s=13 TeV
    (Springer, 2018) Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, E.; Asilar, E.; Bergauer, T.; The CMS Collaboration
    A search for new physics in events with a Z boson produced in association with large missing transverse momentum at the LHC is presented. The search is based on the 2016 data sample of proton-proton collisions recorded with the CMS experiment at root s = 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1). The results of this search are interpreted in terms of a simplified model of dark matter production via spin-0 or spin-1 mediators, a scenario with a standard-model-like Higgs boson produced in association with the Z boson and decaying invisibly, a model of unparticle production, and a model with large extra spatial dimensions. No significant deviations from the background expectations are found, and limits are set on relevant model parameters, significantly extending the results previously achieved in this channel.