A sample of 1.3 x 10(5)K+? p(0)e(+)?? candidates with less than 1% background was collected by the NA62 experiment at the CERN SPS in 2017-2018. Branching fraction measurements are obtained at percent relative precision in three restricted kinematic regions, improving on existing results by a factor larger than two. An asymmetry, possibly related to T-violation, is investigated with no evidence observed within the achieved precision.
A study of the K+ → π0e+νγ decay
Cortina Gil, E.;Dalpiaz, P.;Fiorini, M.;Mazzolari, A.;Neri, I.;Norton, A.;Petrucci, F.;Soldani, M.;Wahl, H.;Bandiera, L.;Cotta Ramusino, A.;Gianoli, A.;Romagnoni, M.;Sytov, A.;Iacopini, E.;Latino, G.;Parenti, A.;Georgiev, G.;Lanfranchi, G.;D'Errico, M.;Giordano, R.;Santoni, C.;Barbanera, M.;Cenci, P.;Pepe, M.;Di Lella, L.;D'Agostini, G.;Turisini, M.;Valente, P.;Vicini, P.;Menichetti, E.;Ruggiero, G.;
2023
Abstract
A sample of 1.3 x 10(5)K+? p(0)e(+)?? candidates with less than 1% background was collected by the NA62 experiment at the CERN SPS in 2017-2018. Branching fraction measurements are obtained at percent relative precision in three restricted kinematic regions, improving on existing results by a factor larger than two. An asymmetry, possibly related to T-violation, is investigated with no evidence observed within the achieved precision.File in questo prodotto:
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