We present the result of a direct search for the decay K(S) -> e(+)e(-), obtained with a sample of e(+)e(-) -> phi -> K(S)K(L) events produced at DA phi NE, the Frascati phi-factory, for an integrated luminosity of 1.9 fb(-1). The search has been performed using a pure K(S) beam tagged by the simultaneous detection of a K(L) interaction in the calorimeter. Background rejection has been optimized by using both kinematic and particle identification cuts. We find BR(KS -> e(+)e(-)) < 9 x 10(-9) at 90% CL, which improves by an order of magnitude on the previous best limit, (C) 2009 Elsevier B.V, All rights reserved.

Ambrosino, F., Antonelli, A., Antonelli, M., Archilli, F., Beltrame, R., Bencivenni, G., et al. (2009). Search for the K(S) -> e(+)e(-) decay with the KLOE detector. PHYSICS LETTERS. SECTION B, 672(3), 203-208 [10.1016/j.physletb.2009.01.037].

Search for the K(S) -> e(+)e(-) decay with the KLOE detector

CERADINI, Filippo;DI MICCO, Biagio;
2009-01-01

Abstract

We present the result of a direct search for the decay K(S) -> e(+)e(-), obtained with a sample of e(+)e(-) -> phi -> K(S)K(L) events produced at DA phi NE, the Frascati phi-factory, for an integrated luminosity of 1.9 fb(-1). The search has been performed using a pure K(S) beam tagged by the simultaneous detection of a K(L) interaction in the calorimeter. Background rejection has been optimized by using both kinematic and particle identification cuts. We find BR(KS -> e(+)e(-)) < 9 x 10(-9) at 90% CL, which improves by an order of magnitude on the previous best limit, (C) 2009 Elsevier B.V, All rights reserved.
2009
Ambrosino, F., Antonelli, A., Antonelli, M., Archilli, F., Beltrame, R., Bencivenni, G., et al. (2009). Search for the K(S) -> e(+)e(-) decay with the KLOE detector. PHYSICS LETTERS. SECTION B, 672(3), 203-208 [10.1016/j.physletb.2009.01.037].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/120396
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