[1] Wigner Res Ctr Phys, Inst Particle & Nucl Phys, Konkoly Thege M 29-33, H-1121 Budapest, Hungary
[2] CERN, TE, VSC, VSM, Esplanade Particules 1, CH-1217 Meyrin, Switzerland
[3] CERN, TE, MSC, MDT, Esplanade Particules 1, CH-1217 Meyrin, Switzerland
[4] CERN, TE, ABT, Esplanade Particules 1, CH-1217 Meyrin, Switzerland
[5] CERN, TE, ABT, SE, Esplanade Particules 1, CH-1217 Meyrin, Switzerland
[6] CERN, TE, ABT, BTP, Esplanade Particules 1, CH-1217 Meyrin, Switzerland
[7] Univ Oxford, Dept Phys, Oxford OX1 3PU, England