Precise measurement of the decay ${K_{L}\toπ^0γγ}$
| dc.creator | Lai, A. | |
| dc.date | 2002-05-06 | |
| dc.date.accessioned | 2026-07-07T10:32:10Z | |
| dc.date.available | 2026-07-07T10:32:10Z | |
| dc.description | The decay rate of $\klpgg$ has been measured with the NA48 detector at the CERN SPS. A total of 2558 $\klpgg$ candidates have been observed with a residual background of 3.2%. The branching ratio is determined to be $(1.36 \pm0.03_{(stat)} \pm0.03_{(syst)}\pm 0.03_{(norm)})\times10^{-6}$ and the vector coupling constant $a_v = -0.46 \pm0.03_{(stat)} \pm0.04_{(syst)}$. This result suggests that the CP-violation effects are dominating in the $\klpee$ decay. An upper limit for the $\klpgg$ decay rate in the two photon mass region $m_{γγ}<m_{π^0}$ is also given. | |
| dc.description | 12 pages, 7 figures and 2 tables. to be published in Phisics Letters B | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0205010 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0205010 | |
| dc.identifier | Phys.Lett.B536:229-240,2002 | |
| dc.identifier | doi:10.1016/S0370-2693(02)01863-4 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/178663 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Precise measurement of the decay ${K_{L}\toπ^0γγ}$ | |
| dc.type | text |