@article{3165333,
    title = "Search for long-lived particles that decay into final states containing
two electrons or two muons in proton-proton collisions at root s=8Tev",
    author = "Khachatryan, V. and Sirunyan, A. M. and Tumasyan, A. and Adam, W. and and Bergauer, T. and Dragicevic, M. and Eroe, J. and Friedl, M. and and Fruehwirth, R. and Ghete, V. M. and Hartl, C. and Hoermann, N. and and Hrubec, J. and Jeitler, M. and Kiesenhofer, W. and Knuenz, V. and and Krammer, M. and Kraetschmer, I. and Liko, D. and Mikulec, I. and Rabady, and D. and Rahbaran, B. and Rohringer, H. and Schoefbeck, R. and Strauss, J. and and Treberer-Treberspurg, W. and Waltenberger, W. and Wulz, C-E and and Mossolov, V. and Shumeiko, N. and Gonzalez, J. Suarez and Alderweireldt, and S. and Bansal, M. and Bansal, S. and Comelis, T. and De Wolf, E. A. and and Janssen, X. and Knutsson, A. and Lauwers, J. and Luyckx, S. and and Ochesanu, S. and Rougny, R. and Van De Klundert, M. and Van Haevermaet, and H. and Van Mechelen, P. and Van Remortel, N. and Van Spilbeeck, A. and and Blekman, F. and Blyweert, S. and D'Hondt, J. and Daci, N. and and Heracleous, N. and Keaveney, J. and Lowette, S. and Maes, M. and and Olbrechts, A. and Python, Q. and Strom, D. and Tavemier, S. and Van and Doninck, W. and Van Mulders, P. and Van Onsem, G. P. and Villella, I. and and Caillol, C. and Clerbaux, B. and De Lentdecker, G. and Dobur, D. and and Favart, L. and Gay, A. P. R. and Grebenyuk, A. and Leonard, A. and and Mohammadi, A. and Pernie, L. and Randle-conde, A. and Reis, T. and Seva, and T. and Thomas, L. and Vander Velde, C. and Vanlaer, P. and Wang, J. and and Zenoni, F. and Adler, V. and Beernaert, K. and Benucci, L. and Cimmino, and A. and Costantini, S. and Crucy, S. and Dildick, S. and Fagot, A. and and Garcia, G. and Mccartin, J. and Rios, A. A. Ocampo and Ryckbosch, D. and and Diblen, S. Salva and Sigamani, M. and Strobbe, N. and Thyssen, F. and and Tytgat, M. and Yazgan, E. and Zaganidis, N. and Basegmez, S. and and Beluffi, C. and Bruno, G. and Castello, R. and Caudron, A. and Ceard, L. and and Da Silveira, G. G. and Delaere, C. and du Pree, T. and Favart, D. and and Forthomme, L. and Giammanco, A. and Hollar, J. and Jafari, A. and and Jez, P. and Komm, M. and Lemaitre, V. and Nuttens, C. and Pagano, D. and and Perrini, L. and Pin, A. and Piotrzkowski, K. and Popov, A. and and Quertenmont, L. and Selvaggi, M. and Marono, M. 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A. and and Carlsmith, D. and Cepeda, M. and Dasu, S. and Dodd, L. and Duric, S. and and Friis, E. and Hall-Wilton, R. and Herndon, M. and Herve, A. and and Klabbers, P. and Lanaro, A. and Lazaridis, C. and Levine, A. and and Loveless, R. and Mohapatra, A. and Ojalvo, I. and Perry, T. and Pierro, and G. A. and Polese, G. and Ross, I. and Sarangi, T. and Savin, A. and and Smith, W. H. and Taylor, D. and Vuosalo, C. and Woods, N. and CMS and Collaboration",
    journal = "Physical Review D",
    year = "2015",
    volume = "91",
    number = "5",
    publisher = "AMER PHYSICAL SOC",
    issn = "2470-0010, 2470-0029",
    doi = "10.1103/PhysRevD.91.052012",
    abstract = "A search is performed for long-lived particles that decay into final
states that include a pair of electrons or a pair of muons. The
experimental signature is a distinctive topology consisting of a pair of
charged leptons originating from a displaced secondary vertex. Events
corresponding to an integrated luminosity of 19.6 (20.5) fb(-1) in the
electron (muon) channel were collected with the CMS detector at the CERN
LHC in proton-proton collisions at root s TeV. No significant excess is
observed above standard model expectations. Upper limits on the product
of the cross section and branching fraction of such a signal are
presented as a function of the long-lived particle’s mean proper decay
length. The limits are presented in an approximately model-independent
way, allowing them to be applied to a wide class of models yielding the
above topology. Over much of the investigated parameter space, the
limits obtained are the most stringent to date. In the specific case of
a model in which a Higgs boson in the mass range 125-1000 GeV/c(2)
decays into a pair of long-lived neutral bosons in the mass range 20-350
GeV= c(2), each of which can then decay to dileptons, the upper limits
obtained are typically in the range 0.2-10 fb for mean proper decay
lengths of the long-lived particles in the range 0.01-100 cm. In the
case of the lowest Higgs mass considered (125 GeV/c(2)), the limits are
in the range 2-50 fb. These limits are sensitive to Higgs boson
branching fractions as low as 10(-1)."
}