[1] Univ Savoie, Lab Annecy Le Vieux Phys Particules, IN2P3, CNRS, F-74941 Annecy Le Vieux, France
[2] So Methodist Univ, Dept Phys, Dallas, TX 75275 USA
[3] CERN, Geneva, Switzerland
[4] Univ Geneva, Dept Phys Nucl & Corpusculaire, Geneva, Switzerland
[5] Columbia Univ, Nevis Labs, Irvington, NY USA
[6] Ctr Phys Particles Marsielle CPPM, Marseille, France
[7] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst Phys, D-8000 Munich, Germany
[8] Lab Accelerateur Lineaire, F-91405 Orsay, France
[9] Univ Paris 06, Lab Phys Nucl & Hautes Energies, Paris, France
[10] Univ Paris 07, Lab Phys Nucl & Hautes Energies, Paris, France
[11] Acad Sinica, Inst Phys, Taipei, Taiwan