Search for vector-like light-flavor quark partners in proton-proton collisions at $\sqrt{s} = 8$ TeV

Albert M Sirunyan, Armen Tumasyan, Wolfgang Adam, Ece Asilar, Thomas Bergauer, Johannes Brandstetter, Erica Brondolin, Marko Dragicevic, Janos Erö, Martin Flechl, Markus Friedl, Rudolf Fruehwirth, Vasile Mihai Ghete, Christian Hartl, Natascha Krammer, Josef Hrubec, Manfred Jeitler, Axel König, Ilse Krätschmer, Dietrich Liko, Takashi Matsushita, Ivan Mikulec, Dinyar Rabady, Navid Rad, Babak Rahbaran … & Nathaniel Woods
A search is presented for heavy vector-like quarks (VLQs) that couple only to light quarks in proton-proton collisions at $\sqrt{s} = 8$ TeV at the LHC. The data were collected by the CMS experiment during 2012 and correspond to an integrated luminosity of 19.7 fb$^{-1}$. Both single and pair production of VLQs are considered. The single-production search is performed for down-type VLQs (electric charge of magnitude 1/3), while the pair-production search is sensitive to up-type...
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