abstract
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The NA62 experiment aims to measure the BR(K →π νν̄) with a 10%25 precision. One of the main backgrounds comes from the decay K →μ ν, therefore a highly powerful pion/muon separation is needed. The NA62 RICH, together with the calorimeter system, provides an accurate particle identification which has been essential to obtain the first results of the NA62 K →π νν̄ analysis, based on 2016 data. Two different algorithms have been exploited which, used in combination, allowed to get a pion reconstruction and identification efficiency of 75%25, with a muon suppression factor of about 500, in the momentum range 15–35 GeV/c. © 2019
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The NA62 experiment aims to measure the BR(K%2b→π%2bνν̄) with a 10%25 precision. One of the main backgrounds comes from the decay K%2b→μ%2bν, therefore a highly powerful pion/muon separation is needed. The NA62 RICH, together with the calorimeter system, provides an accurate particle identification which has been essential to obtain the first results of the NA62 K%2b→π%2bνν̄ analysis, based on 2016 data. Two different algorithms have been exploited which, used in combination, allowed to get a pion reconstruction and identification efficiency of 75%25, with a muon suppression factor of about 500, in the momentum range 15–35 GeV/c. © 2019
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