Search for New Phenomena in <em>tt</em> Events with Large Missing Transverse Momentum in Proton-Proton Collisions at √s=7  TeV with the ATLAS Detector

58 Department of Modern Physics and State Key Laboratory of Particle Detection and Electronics (a) , University of Science and Technology of China, Hefei; Institute of Frontier

Abstract The performance of the missing transverse momentum (E T miss ) reconstruction with the ATLAS detector is evaluated using data collected in proton–proton collisions at the

35 (a) Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; (b) Department of Modern Physics, University of Science and Technology of China, Anhui; (c) Department

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; (b) Department of Modern Physics, University of Science and Technology of China, Anhui; (c) Department

34 ( a ) Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; ( b ) Department of Modern Physics, University of Science and Technology of China, Anhui; ( c

36 ( a ) INFN Gruppo Collegato di Cosenza; ( b ) Dipartimento di Fisica, Università della Calabria, Arcavata di Rende, Italy 37 Faculty of Physics and Applied Computer Science, AGH

In addition to the two high transverse energy ( E T ) photons and large E miss T , the signal events typically include several high-E T jets due to the cascade decays, with the E

32 (a) Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; (b) Department of Modern Physics, University of Science and Technology of China, Anhui; (c) Department