WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7150

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Now showing 1 - 3 of 3
  • Article
    Citation - WoS: 24
    Citation - Scopus: 34
    Measurement of Spin Correlations in Tt‾ Production Using the Matrix Element Method in the Muon+jets Final State in Pp Collisions at √s=8 Tev
    (Elsevier B.V., 2016) Khachatryan, V.; Karapınar, Güler; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Cuevas, J.; 01. Izmir Institute of Technology
    The consistency of the spin correlation strength in top quark pair production with the standard model (SM) prediction is tested in the muon+jets final state. The events are selected from pp collisions, collected by the CMS detector, at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.7 fb−1. The data are compared with the expectation for the spin correlation predicted by the SM and with the expectation of no correlation. Using a template fit method, the fraction of events that show SM spin correlations is measured to be 0.72±0.08(stat)−0.13 +0.15(syst), representing the most precise measurement of this quantity in the muon+jets final state to date. © 2016 The Author
  • Article
    Citation - WoS: 76
    Citation - Scopus: 85
    A Search for Pair Production of New Light Bosons Decaying Into Muons
    (Elsevier B.V., 2016) Khachatryan, V.; Karapınar, Güler; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Soares, M.S.; 01. Izmir Institute of Technology
    A search for the pair production of new light bosons, each decaying into a pair of muons, is performed with the CMS experiment at the LHC, using a dataset corresponding to an integrated luminosity of 20.7 fb−1 collected in proton–proton collisions at center-of-mass energy of s=8 TeV. No excess is observed in the data relative to standard model background expectation and a model independent upper limit on the product of the cross section, branching fraction, and acceptance is derived. The results are compared with two benchmark models, the first one in the context of the next-to-minimal supersymmetric standard model, and the second one in scenarios containing a hidden sector, including those predicting a nonnegligible light boson lifetime. © 2015 CERN for the benefit of the CMS Collaboration
  • Article
    Citation - WoS: 32
    Citation - Scopus: 28
    Search for a Heavy Gauge Boson W′ in the Final State With an Electron and Large Missing Transverse Energy in Pp Collisions at S=7 Tev
    (Elsevier B.V., 2011) Khachatryan, V.; Demir, Durmuş Ali; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Lustermann, W.; 04.05. Department of Pyhsics; 04. Faculty of Science; 01. Izmir Institute of Technology
    A search for a heavy gauge boson W′ has been conducted by the CMS experiment at the LHC in the decay channel with an electron and large transverse energy imbalance ET miss, using proton–proton collision data corresponding to an integrated luminosity of 36 pb−1. No excess above standard model expectations is seen in the transverse mass distribution of the electron-ET miss system. Assuming standard-model-like couplings and decay branching fractions, a W′ boson with a mass less than 1.36 TeV/c2 is excluded at 95% confidence level. © 2011 CERN