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.; Venditti, S.. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - (2009). (Intervento presentato al convegno 2009 Kaon International Conference, KAON 2009 tenutosi a Tsukuba; Japan nel 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.
