Three possible solutions for a system of large-angle vetoes (LAV) have been analyzed and tested in order to choose the best option for the NA62 experiment, expected to take data in 2011-12 at CERN. The rejection power reached by the veto system, whose goal is mainly to veto photons from the K+ → π+π0 and K+ → π+π 0π0 decays, is a key-point to collect ∼100 events of the K+ → π+vv̄ decay (BR∼10 -10) with a total background (BG) of the order of 10%, thus providing a very stringent test of the Standard Model (SM) and a measurement of the Vtd element of the Cabibbo-Kobayashi-Maskawa (CKM) matrix. The details of this study and the motivations of the choice among tested options will be reviewed in this paper. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
The photon veto system for the NA62 rare kaon decay experiment / Antonelli, A., Ambrosino, F., Costantini, F., D'Agostini, G., Dulach, B., Fantechi, R., Lamanna, G., Leonardi, E., Mannelli, I., Massarotti, P., Moulson, M., Napolitano, M., Palladino, V., Raffaelli, F., Raggi, M., Romano, A., Saracino, G., Serra, M., Spadaro, T., Valente, P., et al.. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - (2009). (2009 Kaon International Conference, KAON 2009 Tsukuba; Japan 2009).
The photon veto system for the NA62 rare kaon decay experiment
D'agostini, G.;Raggi, M.;
2009
Abstract
Three possible solutions for a system of large-angle vetoes (LAV) have been analyzed and tested in order to choose the best option for the NA62 experiment, expected to take data in 2011-12 at CERN. The rejection power reached by the veto system, whose goal is mainly to veto photons from the K+ → π+π0 and K+ → π+π 0π0 decays, is a key-point to collect ∼100 events of the K+ → π+vv̄ decay (BR∼10 -10) with a total background (BG) of the order of 10%, thus providing a very stringent test of the Standard Model (SM) and a measurement of the Vtd element of the Cabibbo-Kobayashi-Maskawa (CKM) matrix. The details of this study and the motivations of the choice among tested options will be reviewed in this paper. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
