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Volpe, R.; Anzivino, G.; Aisa, D.; Barbanera, M.; Bizzarri, M.; Bizzeti, A.; Brizioli, F.; Bucci, F.; Campeggi, C.; Carassiti, V.; Cassese, A.; Cenci, P.; Ciaranfi, R.; Duk, V.; Iacopini, E.; Engelfried, J.; Estrada-Tristan, N.; Imbergamo, E.; Latino, G.; Lenti, M.; Lollini, R.; Maletta, F.; Papi, A.; Pepe, M.; Piandani, R.; Piccini, M.; Piluso, A.; Scolieri, G.
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 02/2020, Volume: 952Journal Article
The NA62 experiment aims to measure the BR(K+→π+νν̄) with a 10% 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%, with a muon suppression factor of about 500, in the momentum range 15–35 GeV/c.
