Feb 21 – 25, 2022
Vienna University of Technology
Europe/Vienna timezone

High level performance of the NA62 RICH detector

Not scheduled
20m
Vienna University of Technology

Vienna University of Technology

Gusshausstraße 27-29, 1040 Wien
Recorded Presentation Cherenkov Detectors

Speaker

Ilaria Panichi (Universita e INFN, Firenze (IT))

Description

NA62 is the last generation kaon experiment at the CERN SPS aiming to measure the branching ratio of the ultra-rare K+→π+νν decay with 10% accuracy. The challenging aspect of NA62 is the suppression of background decay channels with branching ratios up to 10 orders of magnitude higher than the signal and with similar experimental signature: one of the main backgrounds comes from the K+→μ+ν decay, therefore a highly powerful pion/muon separation is needed. To this purpose good identification (PID) is required. A key element of PID in NA62 is the Ring-Imaging Cherenkov (RICH) detector. According to the NA62 requirements, the RICH identifies μ+ and π+ in the momentum range between 15 and 35 GeV/c with a muon rejection factor of 10−2. It also measures the arrival time of charged particles with a precision better than 100 ps and is one of the main components of the NA62 trigger system. The RICH detector has been successfully operated during the 2016, 2017 and 2018 data taking periods of NA62, being essential in the analysis leading to the first evidence for the observation of the K+→π+νν decay. NA62 data taking was resumed in 2021. The main design aspects and operational characteristics of the detector will be described and a detailed report of its performance concerning the π/μ separation, directly measured with the data collected in 2021, will be presented for the first time, together with other preliminary results.

Primary experiment NA62

Primary author

Ilaria Panichi (Universita e INFN, Firenze (IT))

Co-author

Dr Francesca Bucci (INFN Florence)

Presentation materials