A measurement of the direct CP violating charge asymmetries of the Dalitz plot linear slopes Ag = (g(+) − g(−) )/(g(+) + g(−) ) in K± → π± π+ π− and K± → π± π0 π0 decays by the NA48/2 experiment at CERN SPS is presented. A new technique of asymmetry measurement involving simultaneous K+ and K−beams and a large data sample collected allowed a result of an unprecedented precision. The charge asymmetries were measured to be Agc = (−1.5 ± 2.2) × 10^−4 with 3.11 × 10^9 K± → π± π+ π− decays, and Agn = (1.8 ± 1.8) × 10^−4 with 9.13 × 10^7 K± → π± π0 π0 decays. The precision of the results is limited mainly by the size of the data sample.
Search for direct CP violating charge asymmetries in K ±→π±π+π - and K±→π±π 0π0 decays / J. R., B., A. J., C., G., K., C., L., D. J., M., M. W., S., S. A., W., R., A., G., B., N., C., A., C., D., C., V., F., M., F., L., G., A., G., W., K., A., N., A., M., M., P., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - STAMPA. - 52:(2007), pp. 875-891. [10.1140/epjc/s10052-007-0456-7]
Search for direct CP violating charge asymmetries in K ±→π±π+π - and K±→π±π 0π0 decays
BIZZETI, Andrea;
2007
Abstract
A measurement of the direct CP violating charge asymmetries of the Dalitz plot linear slopes Ag = (g(+) − g(−) )/(g(+) + g(−) ) in K± → π± π+ π− and K± → π± π0 π0 decays by the NA48/2 experiment at CERN SPS is presented. A new technique of asymmetry measurement involving simultaneous K+ and K−beams and a large data sample collected allowed a result of an unprecedented precision. The charge asymmetries were measured to be Agc = (−1.5 ± 2.2) × 10^−4 with 3.11 × 10^9 K± → π± π+ π− decays, and Agn = (1.8 ± 1.8) × 10^−4 with 9.13 × 10^7 K± → π± π0 π0 decays. The precision of the results is limited mainly by the size of the data sample.| File | Dimensione | Formato | |
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