Search for Displaced Supersymmetry in Events with an Electron and a Muon with Large Impact Parameters

Search for Displaced Supersymmetry in Events with an Electron and a Muon with Large Impact Parameters

A search for new long-lived particles decaying to leptons is presented using proton-proton collisions produced by the LHC at root s = 8 TeV. Data used for the analysis were collected by the CMS detector and correspond to an integrated luminosity of 19.7 fb(-1). Events are selected with an electron a...

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Hauptverfasser: Liko, D, Alderweireldt, S, Reis, T, Delaere, C, Perrini, L, Alda, WL, Aleksandrov, A, Chen, GM, Wang, Z, Asawatangtrakuldee, C, Gomez, JP, Puljak, I, Kadija, K, Goetzmann, C, Alvarez, JDR, Perieanu, A, Wittmer, B, Merschmeyer, M, Hoehle, F, Horton, D, Melzer-Pellmann, IA, Sander, C, Rocker, S, Geralis, T, Markou, A, Aslanoglou, X, Kaur, M, Goldouzian, R, Grunewald, M, Pompili, A, Abbiendi, G, Gonzi, S, Zumerle, G, Savoy-Navarro, A, Spagnolo, P, Organtini, G, Zanetti, A, Kim, GN, Song, S, Lopez-Fernandez, R, Gallinaro, M, Iglesias, LL, Lanev, A, Krychkine, V, Sobol, A, Cuevas, J, Caballero, IG, Benhabib, L, Girone, M, Moortgat, F, Sphicas, P, Chanon, N, Takahashi, M, Lin, W, Lu, YJ, Tzeng, YM, Bakirci, MN, Dozen, C, Dumanoglu, I, Gurpinar, E, Hos, I, Della Negra, M, Nash, J, Raymond, DM, Acosta, MV, Dittmann, J, Lawson, P, Alimena, J, Luk, M, Narain, M, Erbacher, R, Miceli, T, Lebourgeois, M, Bornheim, A, Wilkinson, R, Xie, S, Alexander, J, Ryd, A, Anderson, J, Hanlon, J, Hirschauer, J, Spalding, WJ, Tkaczyk, S, Cheng, T, Yumiceva, F, O'Brien, C, Yetkin, T, Fehling, D, Malek, M, Bauer, G, Klapoetke, K, Knowlton, D, Wood, D, Planer, M, Marlow, D, Ecklund, KM, de Barbaro, P, Park, M, Schnetzer, S, Tuo, S
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Zusammenfassung:A search for new long-lived particles decaying to leptons is presented using proton-proton collisions produced by the LHC at root s = 8 TeV. Data used for the analysis were collected by the CMS detector and correspond to an integrated luminosity of 19.7 fb(-1). Events are selected with an electron and muon with opposite charges that both have transverse impact parameter values between 0.02 and 2 cm. The search has been designed to be sensitive to a wide range of models with nonprompt e-mu final states. Limits are set on the "displaced supersymmetry" model, with pair production of top squarks decaying into an e-mu final state via R-parity-violating interactions. The results are the most restrictive to date on this model, with the most stringent limit being obtained for a top squark lifetime corresponding to c tau = 2 cm, excluding masses below 790 GeV at 95% confidence level.
ISSN:0031-9007