The photon veto system for the NA62 rare kaon decay experiment

✍ Scribed by Stefano Venditti

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 519 KB
• Volume: 617
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2009.10.116

✦ Synopsis

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 assured by the veto system, whose goal is mainly to veto photons from the K þ -p þ p 0 and K þ -p þ p 0 p 0 decays, is a key-point to collect $ 100 events of the K þ -p þ nn decay (BR $ 10 À10 ) 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 V td element of the Cabibbo-Kobayashi-Maskawa (CKM) matrix. The details of this study and the final decision taken will be reviewed in this paper.