x / 03 03 04 3 v 1 2 7 M ar 2 00 3 BABAR - CONF - 03 / 08 SLAC - PUB - 9696 March 2003 Limits on the Lifetime Difference of Neutral B Mesons

Using events in which one of two neutral B mesons from the decay of an Υ (4S) resonance is fully reconstructed, we set limits on the lifetime difference between the two neutral-B mass eigenstates and on CP , T , and CPT violation in B0B0 mixing. Both CP and non-CP eigenstates were obtained from the 88 million Υ (4S) → BB decays collected between 1999 and 2002 with the BABAR detector at the PEP-II asymmetric-energy B-Factory at SLAC. We determine six independent parameters governing mixing (∆m, ∆Γ/Γ), CPT/CP violation (Rez, Imz), and CP/T violation (ImλCP , |q/p|), where λCP characterizes B 0 and B0 decays to states of charmonium plusK0 S orK0 L . The preliminary results are sgn(ReλCP )∆Γ/Γ = −0.008±0.037(stat.) ± 0.018(syst.) [−0.084,0.068] , |q/p| = 1.029±0.013(stat.) ± 0.011(syst.) [ 1.001,1.057] , (ReλCP /|λCP |) Rez = 0.014±0.035(stat.) ± 0.034(syst.) [−0.072,0.101] , Imz = 0.038±0.029(stat.) ± 0.025(syst.) [−0.028,0.104] . The values inside square brackets indicate the 90% confidence-level intervals. For ImλCP /|λCP | and ∆m we find values consistent with recent results from other analyses. These results are consistent with Standard Model expectations. Presented at the XXXVIIIth Rencontres de Moriond on Electroweak Interactions and Unified Theories, 3/15–3/22/2003, Les Arcs, Savoie, France Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309 Work supported in part by Department of Energy contract DE-AC03-76SF00515. The BABAR Collaboration, B. Aubert, R. Barate, D. Boutigny, J.-M. Gaillard, A. Hicheur, Y. Karyotakis, J. P. Lees, P. Robbe, V. Tisserand, A. Zghiche Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France A. Palano, A. Pompili Università di Bari, Dipartimento di Fisica and INFN, I-70126 Bari, Italy J. C. Chen, N. D. Qi, G. Rong, P. Wang, Y. S. Zhu Institute of High Energy Physics, Beijing 100039, China G. Eigen, I. Ofte, B. Stugu University of Bergen, Inst. of Physics, N-5007 Bergen, Norway G. S. Abrams, A. W. Borgland, A. B. Breon, D. N. Brown, J. Button-Shafer, R. N. Cahn, E. Charles, C. T. Day, M. S. Gill, A. V. Gritsan, Y. Groysman, R. G. Jacobsen, R. W. Kadel, J. Kadyk, L. T. Kerth, Yu. G. Kolomensky, J. F. Kral, G. Kukartsev, C. LeClerc, M. E. Levi, G. Lynch, L. M. Mir, P. J. Oddone, T. J. Orimoto, M. Pripstein, N. A. Roe, A. Romosan, M. T. Ronan, V. G. Shelkov, A. V. Telnov, W. A. Wenzel Lawrence Berkeley National Laboratory and University of California, Berkeley, CA 94720, USA T. J. Harrison, C. M. Hawkes, D. J. Knowles, R. C. Penny, A. T. Watson, N. K. Watson University of Birmingham, Birmingham, B15 2TT, United Kingdom T. Deppermann, K. Goetzen, H. Koch, B. Lewandowski, M. Pelizaeus, K. Peters, H. Schmuecker, M. Steinke Ruhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, Germany N. R. Barlow, W. Bhimji, J. T. Boyd, N. Chevalier, W. N. Cottingham, C. Mackay, F. F. Wilson University of Bristol, Bristol BS8 1TL, United Kingdom C. Hearty, T. S. Mattison, J. A. McKenna, D. Thiessen University of British Columbia, Vancouver, BC, Canada V6T 1Z1 P. Kyberd, A. K. McKemey Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom V. E. Blinov, A. D. Bukin, V. B. Golubev, V. N. Ivanchenko, E. A. Kravchenko, A. P. Onuchin, S. I. Serednyakov, Yu. I. Skovpen, E. P. Solodov, A. N. Yushkov Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia D. Best, M. Chao, D. Kirkby, A. J. Lankford, M. Mandelkern, S. McMahon, R. K. Mommsen, W. Roethel, D. P. Stoker University of California at Irvine, Irvine, CA 92697, USA C. Buchanan University of California at Los Angeles, Los Angeles, CA 90024, USA H. K. Hadavand, E. J. Hill, D. B. MacFarlane, H. P. Paar, Sh. Rahatlou, U. Schwanke, V. Sharma University of California at San Diego, La Jolla, CA 92093, USA