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Journal of High Energy Physics 2 (2013) 085
Search in leptonic channels for heavy resonances decaying to long-lived neutral particles
S. Chatrchyan, M. Besançon1, S. Choudhury1, F. Couderc1, M. Dejardin1, D. Denegri1, B. Fabbro1, J.L. Faure1, F. Ferri1, S. Ganjour1, A. Givernaud1, P. Gras1, G. Hamel de Monchenault1, P. Jarry1, E. Locci1, J. Malcles1, L. Millischer1, A. Nayak1, J. Rander1, A. Rosowsky1, M. Titov1, S. Baffioni2, F. Beaudette2, L. Benhabib2, L. Bianchini2, M. Bluj2, Pierre Busson2, C. Charlot2, N. Daci2, T. Dahms2, M. Dalchenko2, L. Dobrzynski2, A. Florent2, R. Granier de Cassagnac2, M. Haguenauer2, P. Mine2, C. Mironov2, I.N. Naranjo2, M. Nguyen2, C. Ochando2, P. Paganini2, D. Sabes2, R. Salerno2, Y. Sirois2, C. Veelken2, A. Zabi2, J.-L. Agram3, J. Andrea3, D. Bloch3, D. Bodin3, J.-M. Brom3, M. Cardaci3, E.C. Chabert3, C. Collard3, E. Conte3, F. Drouhin3, J.-C. Fontaine3, D. Gele3, U. Goerlach3, P. Juillot3, A.-C. Le Bihan3, P. Van Hove3, S. Beauceron4, N. Beaupere4, O. Bondu4, G. Boudoul4, S. Brochet4, J. Chasserat4, R. Chierici4, D. Contardo4, P. Depasse4, H. El Mamouni4, J. Fay4, S. Gascon4, M. Gouzevitch4, B. Ille4, T. Kurca4, M. Lethuillier4, L. Mirabito4, S. Perries4, L. Sgandurra4, V. Sordini4, Y. Tschudi4, P. Verdier4, S. Viret4
For the CMS collaboration(s)
(2013)

A search is performed for heavy resonances decaying to two long-lived massive neutral particles, each decaying to leptons. The experimental signature is a distinctive topology consisting of a pair of oppositely charged leptons originating at a separated secondary vertex. Events were collected by the CMS detector at the LHC during pp collisions at sqrt(s) = 7 TeV, and selected from data samples corresponding to 4.1 (5.1) inverse femtobarns of integrated luminosity in the electron (muon) channel. No significant excess is observed above standard model expectations, and an upper limit is set with 95% confidence level on the production cross section times the branching fraction to leptons, as a function of the long-lived massive neutral particle lifetime.
1:  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
2:  LLR - Laboratoire Leprince-Ringuet
3:  DRS-IPHC - Département Recherches Subatomiques
4:  IPNL - Institut de Physique Nucléaire de Lyon
Physics/High Energy Physics - Experiment
Fulltext link: 
http://fr.arXiv.org/abs/1211.2472