Stringy origin of diboson and dijet excesses at the LHC

a Department of Physics and Astronomy, Lehman College, City University of New York, NY 10468, USA b Department of Physics, Graduate Center, City University of New York, NY 10016, USA c Department of Astrophysics, American Museum of Natural History, NY 10024, USA d LPTHE, UMR CNRS 7589, Sorbonne Universités, UPMC Paris 6, 75005 Paris, France e Albert Einstein Center, Institute for Theoretical Physics, Bern University, Sidlerstrasse 5, CH-3012 Bern, Switzerland f Department of Physics, Northeastern University, Boston, MA 02115, USA g Department of Physics, National Taiwan Normal University, Taipei, 116, Taiwan h Max-Planck-Institut für Physik, Werner-Heisenberg-Institut, 80805 München, Germany i Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München, 80333 München, Germany