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Physical Review D 87 (2013) 052011
Search for charged massive long-lived particles at sqrt(s)= 1.96 TeV
V.M. Abazov, U. Bassler1, G. Bernardi2, M. Besançon1, D. Brown2, J. Brown2, E. Chapon1, F. Couderc1, F. Deliot1, Y. Enari2, S. Greder3, G. Grenier4, A. Grohsjean1, Z. Hubacek1, T. Kurca4, P. Lebrun4, J. Lellouch2, F. Miconi3, I. Ripp-Baudot3, C. Royon1, M. Titov1, B. Tuchming1, P. Verdier4, L. Zivkovic2, J.-F. Grivaz5, T. Guillemin5, M. Jaffré5, P. Pétroff5, G. Sajot6, J. Stark6, F. Badaud7, Ph. Gris7, M.-C. Cousinou8, A. Duperrin8, W. Geng8, E. Kajfasz8, S. Kermiche8, E. Nagy8, N. Osman8
D0 Collaboration(s)
(2013)

We present a search for charged massive long-lived particles (CMLLPs) that are pair produced in p-pbar collisions at sqrt(s)= 1.96 TeV collected by the D0 experiment at the Fermilab Tevatron collider. Our result is a combination of two searches where either one or both CMLLPs are reconstructed in the detector. We select events with muon-like particles that have both speed and ionization energy loss dE/dx different from muons produced in p-pbar collisions. In the absence of evidence for CMLLPs corresponding to 6.3 fb-1 of integrated luminosity, we set limits on the CMLLP masses in several supersymmetric models, excluding masses below 278 GeV for long-lived gaugino-like charginos, and masses below 244 GeV for long-lived higgsino-like charginos at the 95% C.L. We also set limits on the cross section for pair production of long-lived scalar tau leptons that range from 0.04 pb to 0.008 pb for scalar tau lepton masses of 100 to 300 GeV.
1 :  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
2 :  LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
3 :  IPHC - Institut Pluridisciplinaire Hubert Curien
4 :  IPNL - Institut de Physique Nucléaire de Lyon
5 :  LAL - Laboratoire de l'Accélérateur Linéaire
6 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
7 :  LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]
8 :  CPPM - Centre de Physique des Particules de Marseille
Physique/Physique des Hautes Energies - Expérience
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/1211.2466