CMS Collaboration, Adair, A., Akgun, B., et al.. "Search for Monotop Signatures in Proton-Proton Collisions at √s=8 TeV." Physical Review Letters, 114, (2015) American Physical Society: 101801. http://dx.doi.org/10.1103/PhysRevLett.114.101801.
Results are presented from a search for new decaying massive particles whose presence is inferred from an imbalance in transverse momentum and which are produced in association with a single top quark that decays into a bottom quark and two light quarks. The measurement is performed using 19.7 fb−1 of data from proton-proton collisions at a center-of-mass energy of 8 TeV, collected with the CMS detector at the CERN LHC. No deviations from the standard model predictions are observed and lower limits are set on the masses of new invisible bosons. In particular, scalar and vector particles, with masses below 330 and 650 GeV, respectively, are excluded at 95% confidence level, thereby substantially extending a previous limit published by the CDF Collaboration.
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