在$B^0$介子系统中观测到时间反演对称性破缺
高能物理 - 实验
2013-01-03 v4
摘要
尽管介子系统中的破缺已由工厂确立，但尚未直接观测到时间反演对称性破缺。纠缠中性介子衰变到确定的味态（或）以及或末态（分别称为或），允许比较四对 T 共轭跃迁的概率，例如和，作为两次衰变时间差的函数。利用 SLAC 的 BABAR 探测器收集的衰变产生的 4.68 亿个对，我们测量了中性介子时间演化中的 T 破缺参数，得到和。这些非零结果代表了通过交换初态和末态，在仅能通过 T 对称变换连接的跃迁中，对 T 破缺的首次直接观测。
引用
@article{arxiv.1207.5832,
title = {Observation of Time Reversal Violation in the B0 Meson System},
author = {The BABAR Collaboration and J. P. Lees and V. Poireau and V. Tisserand and J. Garra Tico and E. Grauges and A. Palanoab and G. Eigen and B. Stugu and D. N. Brown and L. T. Kerth and Yu. G. Kolomensky and G. Lynch and H. Koch and T. Schroeder and D. J. Asgeirsson and C. Hearty and T. S. Mattison and J. A. McKenna and R. Y. So and A. Khan and V. E. Blinov and A. R. Buzykaev and V. P. Druzhinin and V. B. Golubev and E. A. Kravchenko and A. P. Onuchin and S. I. Serednyakov and Yu. I. Skovpen and E. P. Solodov and K. Yu. Todyshev and A. N. Yushkov and M. Bondioli and D. Kirkby and A. J. Lankford and M. Mandelkern and H. Atmacan and J. W. Gary and F. Liu and O. Long and G. M. Vitug and C. Campagnari and T. M. Hong and D. Kovalskyi and J. D. Richman and C. A. West and A. M. Eisner and J. Kroseberg and W. S. Lockman and A. J. Martinez and B. A. Schumm and A. Seiden and D. S. Chao and C. H. Cheng and B. Echenard and K. T. Flood and D. G. Hitlin and P. Ongmongkolkul and F. C. 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Wulsin and C. C. Young and V. Ziegler and W. Park and M. V. Purohit and R. M. White and J. R. Wilson and A. Randle-Conde and S. J. Sekula and M. Bellis and P. R. Burchat and T. S. Miyashita and E. M. T. Puccio and M. S. Alam and J. A. Ernst and R. Gorodeisky and N. Guttman and D. R. Peimer and A. Soffer and P. Lund and S. M. Spanier and J. L. Ritchie and A. M. Ruland and R. F. Schwitters and B. C. Wray and J. M. Izen and X. C. Lou and F. Bianchi and D. Gamba and S. Zambito and L. Lanceri and L. Vitale and J. Bernabeu and F. Martinez-Vidal and A. Oyanguren and P. Villanueva-Perez and H. Ahmed and J. Albert and Sw. Banerjee and F. U. Bernlochner and H. H. F. Choi and G. J. King and R. Kowalewski and M. J. Lewczuk and I. M. Nugent and J. M. Roney and R. J. Sobie and N. Tasneem and T. J. Gershon and P. F. Harrison and T. E. Latham and H. R. Band and S. Dasu and Y. Pan and R. Prepost and S. L. Wu},
journal= {arXiv preprint arXiv:1207.5832},
year = {2013}
}
备注
7 pages, 3 postscript figures, 1 table, appendix with 4 pages containing supplementary material. Accepted by Phys. Rev. Lett