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Abreu, H; Alio, L; Alison, J; Arabidze, G; Ayoub, M K; Bain, T; Bates, R L; Beacham, J B; Beckingham, M; Beltramello, O; Bender, M; Black, J E; Blanchard, J-B; Boumediene, D; Burmeister, I; Camacho Toro, R; Capeans Garrido, M D M; Caron, S; Cerio, B C; Cheplakov, A; Chernyatin, V; Chwastowski, J J; Coniavitis, E; Dai, T; Denisov, S P; Di Donato, C; Djobava, T; Ducu, O A; Dudarev, A; Fiorini, L; Fleck, I; Fletcher, R R M; Friedrich, F; Froidevaux, D; Gagnon, P; Gross, E; Hellman, S; Henderson, J; Hirschbuehl, D; Hu, D; Huhtinen, M; Ideal, E; Isaksson, C; Kagan, H; Klingenberg, R; Kluth, S; Kramberger, G; Lee, C A; Livan, M; Lohse, T; Losada, M; Love, J; Lysak, R; Macina, D; Manhaes de Andrade Filho, L; Mantifel, R; Meier, K; Mete, A S; Mineev, M; Morley, A K; Mueller, R S P; Namasivayam, H; Nemecek, S; Oakham, F G; Okumura, Y; Olivares Pino, S A; Padilla Aranda, C; Pataraia, S; Pearce, J; Pedraza Lopez, S; Peng, C; Pizio, C; Plotnikova, E; Qin, Y; Quarrie, D R; Rajagopalan, S; Rinaldi, L; Royon, C R; Saddique, A; Sanchez, A; Schioppa, M; Seuster, R; Shabalina, E; Shamim, M; Silva, J; Smestad, L; Smirnov, S Yu; Tayalati, Y; Trischuk, W; Trovatelli, M; Tsulaia, V; Undrus, A; Ungaro, F C; Vetterli, M C; Walker, R; Wang, H; White, M J; Wiik-Fuchs, L A M; Yamaguchi, Y; Zhao, Z
The European physical journal. C, Particles and fields, 09/2015, Letnik: 75, Številka: 9Journal Article
Many extensions of the Standard Model predict the existence of charged heavy long-lived particles, such as -hadrons or charginos. These particles, if produced at the Large Hadron Collider, should be moving non-relativistically and are therefore identifiable through the measurement of an anomalously large specific energy loss in the ATLAS pixel detector. Measuring heavy long-lived particles through their track parameters in the vicinity of the interaction vertex provides sensitivity to metastable particles with lifetimes from 0.6 ns to 30 ns. A search for such particles with the ATLAS detector at the Large Hadron Collider is presented, based on a data sample corresponding to an integrated luminosity of Formula: see text fbFormula: see text of collisions at Formula: see text TeV. No significant deviation from the Standard Model background expectation is observed, and lifetime-dependent upper limits on -hadrons and chargino production are set. Gluino -hadrons with 10 ns lifetime and masses up to 1185 GeV are excluded at 95 Formula: see text confidence level, and so are charginos with 15 ns lifetime and masses up to 482 GeV.
