Measurement of the branching ratios of the decays Xi0 --> Sigma+ e- nubar and anti-Xi0 --> anti-Sigma+ e+ nu
| dc.creator | I Collaboration | |
| dc.date | 2006-12-18 | |
| dc.date.accessioned | 2026-07-07T10:22:07Z | |
| dc.date.available | 2026-07-07T10:22:07Z | |
| dc.description | From 56 days of data taking in 2002, the NA48/1 experiment observed 6316 Xi0 --> Sigma+ e- nubar candidates (with the subsequent Sigma+ --> p pi0 decay) and 555 anti-Xi0 --> anti-Sigma+ e+ nu candidates with background contamination of 215+-44 and 136+-8 events, respectively. From these samples, the branching ratios BR(Xi0 --> Sigma+ e- nubar)= (2.51+-0.03stat+-0.09syst)E(-4) and BR(anti-Xi0 --> anti-Sigma+ e+ nu)= (2.55+-0.14stat+-0.10syst)E(-4) were measured allowing the determination of the CKM matrix element |Vus| = 0.209+0.023-0.028. Using the Particle Data Group average for |Vus| obtained in semileptonic kaon decays, we measured the ratio g1/f1 = 1.20+-0.05 of the axial-vector to vector form factors. | |
| dc.description | 16 pages, 11 figures Submitted to Phys.Lett.B | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0612043 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0612043 | |
| dc.identifier | Phys.Lett.B645:36-46,2007 | |
| dc.identifier | doi:10.1016/j.physletb.2006.12.028 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/175406 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurement of the branching ratios of the decays Xi0 --> Sigma+ e- nubar and anti-Xi0 --> anti-Sigma+ e+ nu | |
| dc.type | text |