Recent results from the NA48/2 experiment are presented. The most precise measurement of the charged kaon semileptonic form factors has been obtained from 4.28 million Ke±3 and 2.91 million Kµ±3 events collected in 2004. A sample of 1663 events of the very rare decay K± ? µ±?e+e- has been collected in the region Mee > 140 MeV/c2 with negligible background. The measured model independent decay rate is in agreement with ChPT predictions. The branching ratio of the K± ? p±p0e+e- decay, never observed so far, has been obtained from a sample of 5000 candidates, in agreement with ChPT predictions.

New and recent results from NA48/2 / Madigozhin, D., Anzivino, G., Arcidiacono, R., Baldini, W., Balev, S., Batley, J.R., Behler, M., Bifani, S., Biino, C., Bizzeti, A., Bloch-Devaux, B., Bocquet, G., Cabibbo, N., Calvetti, M., Cartiglia, N., Ceccucci, A., Celeghini, E., Cenci, P., Cerri, C., Cheshkov, C., et al.. - (2017), pp. 65-70. (52nd Rencontres de Moriond on QCD and High Energy Interactions 2017 Aosta Valley, ita 2017).

New and recent results from NA48/2

Bizzeti A.;
2017

Abstract

Recent results from the NA48/2 experiment are presented. The most precise measurement of the charged kaon semileptonic form factors has been obtained from 4.28 million Ke±3 and 2.91 million Kµ±3 events collected in 2004. A sample of 1663 events of the very rare decay K± ? µ±?e+e- has been collected in the region Mee > 140 MeV/c2 with negligible background. The measured model independent decay rate is in agreement with ChPT predictions. The branching ratio of the K± ? p±p0e+e- decay, never observed so far, has been obtained from a sample of 5000 candidates, in agreement with ChPT predictions.
2017
52nd Rencontres de Moriond on QCD and High Energy Interactions 2017
Aosta Valley, ita
2017
65
70
Madigozhin, D.; Anzivino, G.; Arcidiacono, R.; Baldini, W.; Balev, S.; Batley, J. R.; Behler, M.; Bifani, S.; Biino, C.; Bizzeti, A.; Bloch-Devaux, B....espandi
New and recent results from NA48/2 / Madigozhin, D., Anzivino, G., Arcidiacono, R., Baldini, W., Balev, S., Batley, J.R., Behler, M., Bifani, S., Biino, C., Bizzeti, A., Bloch-Devaux, B., Bocquet, G., Cabibbo, N., Calvetti, M., Cartiglia, N., Ceccucci, A., Celeghini, E., Cenci, P., Cerri, C., Cheshkov, C., et al.. - (2017), pp. 65-70. (52nd Rencontres de Moriond on QCD and High Energy Interactions 2017 Aosta Valley, ita 2017).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1210666
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