Yazar "Abud, A." seçeneğine göre listele

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  • Küçük Resim Yok
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    Search for heavy diboson resonances in semileptonic final states in pp collisions at ?s=13 TeV with the ATLAS detector
    (Springer, 2020) Aad, G.; Abbott, B.; Abbott, D. C.; Abud, A.; Abeling, K.; Abhayasinghe, D. K.; Çetin, Serkant Ali
    This paper reports on a search for heavy resonances decaying into WW, ZZ or WZ using proton-proton collision data at a centre-of-mass energy of integral s = 13TeV. The data, corresponding to an integrated luminosity of 139 fb(1), were recorded with the ATLAS detector from 2015 to 2018 at the Large Hadron Collider. The search is performed for final states in which one W or Z boson decays leptonically, and the other W boson or Z boson decays hadronically. The data are found to be described well by expected backgrounds. Upper bounds on the production cross sections of heavy scalar, vector or tensor resonances are derived in the mass range 300-5000 GeV within the context of Standard Model extensions with warped extra dimensions or including a heavy vector triplet. Production through gluon-gluon fusion, Drell-Yan or vector-boson fusion are considered, depending on the assumed model.
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    Search for new phenomena in final states with large jet multiplicities and missing transverse momentum using ?s=13 TeV proton-proton collisions recorded by ATLAS in Run 2 of the LHC
    (Springer, 2020) Aad, G.; Abbott, B.; Abbott, D. C.; Abud, A.; Abeling, K.; Abhayasinghe, D. K.; Çetin, Serkant Ali
    Results of a search for new particles decaying into eight or more jets and moderate missing transverse momentum are presented. The analysis uses 139 fb(-1) of proton-proton collision data at root s = 13 TeV collected by the ATLAS experiment at the Large Hadron Collider between 2015 and 2018. The selection rejects events containing isolated electrons or muons, and makes requirements according to the number of b-tagged jets and the scalar sum of masses of large-radius jets. The search extends previous analyses both in using a larger dataset and by employing improved jet and missing transverse momentum reconstruction methods which more cleanly separate signal from background processes. No evidence for physics beyond the Standard Model is found. The results are interpreted in the context of supersymmetry-inspired simplified models, significantly extending the limits on the gluino mass in those models. In particular, limits on the gluino mass are set at 2 TeV when the lightest neutralino is nearly massless in a model assuming a two-step cascade decay via the lightest chargino and second-lightest neutralino.