| Preprint | |
| Report number | hep-ex/0410032 |
| Title | Semileptonic KL Decays at NA48 |
| Author(s) | Veltri, M. (Urbino U. ; INFN, Florence) |
| Publication | 2004 |
| Collaboration | NA48 Collaboration |
| Imprint | 12 Oct 2004 |
| Number of pages | 4 |
| Note | 4 pages, 2 figures. To appear in the proceedings of the Vth Rencontres du Vietnam, Particle Physics and Astrophysics, Hanoi, Vietnam, August 5-11, 2004 |
| Presented at | 5th Rencontres du Vietnam on Particle Physics and Astrophysics: New Views in Particle Physics, Hanoi, Vietnam, 5 - 11 Aug 2004 |
| Subject category | Particle Physics - Experiment |
| Abstract | Preliminary results on KL->pi e nu(gamma) decays collected by the NA48 detector at the CERN SPS are reported. Using a sample of 6.8 X 10^6 reconstructed events BR(Ke3) = 0.4010+-0.0028+-0.0035 was obtained. From the branching ratio the value of |Vus|= 0.2187+-0.0028 was extracted. The same data sample has provided also a high precision measurement of the slope lambda+ of the form factor of the Ke3 decay. Investigating the Ke3gamma decay, from a sample of 18977 reconstructed events, BR(Ke3gamma)/BR(Ke3) = (0.964+-0.008+0.012-0.011)% was determined. |
| Other source | Inspire |
Record created 2004-10-14, last modified 2023-03-14