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EnglishWe present the result of a direct search for the decay KS →e+e−, obtained with a sample of e+e− → φ → KS KL events produced at DANE, the Frascati φ-factory, for an integrated luminosity of 1.9 fb−1. The search has been performed using a pure KS beam tagged by the simultaneous detection of a KL interaction in the calorimeter. Background rejection has been optimized by using both kinematic and particle identification cuts. We find BR(KS →e+e− ) < 9 × 10−9 at 90% CL, which improves by an order of magnitude on the previous best limit.
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| Titolo: | Search for the Ks -> e+ e- decay with the KLOE detector |
| Autori: | |
| Data di pubblicazione: | 2009 |
| Rivista: | |
| Abstract: | We present the result of a direct search for the decay KS →e+e−, obtained with a sample of e+e− → φ → KS KL events produced at DANE, the Frascati φ-factory, for an integrated luminosity of 1.9 fb−1. The search has been performed using a pure KS beam tagged by the simultaneous detection of a KL interaction in the calorimeter. Background rejection has been optimized by using both kinematic and particle identification cuts. We find BR(KS →e+e− ) < 9 × 10−9 at 90% CL, which improves by an order of magnitude on the previous best limit. |
| Handle: | http://hdl.handle.net/11573/31819 |
| Appare nella tipologia: | 01a Articolo in rivista |
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http://hdl.handle.net/11573/31819
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