Measurement of the rare decay pi0 -> e+ e-
| dc.creator | Abouzaid, E. | |
| dc.date | 2006-10-24 | |
| dc.date.accessioned | 2026-07-07T10:24:42Z | |
| dc.date.available | 2026-07-07T10:24:42Z | |
| dc.description | The branching ratio of the rare decay pi0 -> e+ e- has been measured precisely, using the complete data set from the KTeV E799-II experiment at Fermilab. We observe 794 candidate pi0 -> e+ e- events using K0_L -> 3pi0 as a source of tagged pi0's. The expected background is 52.7 +- 11.2 events, predominantly from high e+ e- mass pi0 -> e+ e- gamma decays. We have measured B[(pi0 -> e+ e-), (m_e+e-/m_pi0)^2 > 0.95] = 6.44 +- 0.25(stat) +- 0.22(syst) x10^(-8), which is above the unitary bound from pi0 -> gamma gamma and within the range of theoretical expectations from the standard model. | |
| dc.description | 6 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0610072 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0610072 | |
| dc.identifier | Phys.Rev.D75:012004,2007 | |
| dc.identifier | doi:10.1103/PhysRevD.75.012004 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/176281 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurement of the rare decay pi0 -> e+ e- | |
| dc.type | text |