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Measurement of the branching fraction for the decay KS → πμν with the KLOE detector. / The KLOE-2 Collaboration.
в: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Том 804, 135378, 10.05.2020.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Measurement of the branching fraction for the decay KS → πμν with the KLOE detector
AU - The KLOE-2 Collaboration
AU - Babusci, D.
AU - Berlowski, M.
AU - Bloise, C.
AU - Bossi, F.
AU - Branchini, P.
AU - Budano, A.
AU - Cao, B.
AU - Ceradini, F.
AU - Ciambrone, P.
AU - Curciarello, F.
AU - Czerwiński, E.
AU - D'Agostini, G.
AU - Danè, E.
AU - De Leo, V.
AU - De Lucia, E.
AU - De Santis, A.
AU - De Simone, P.
AU - Di Cicco, A.
AU - Di Domenico, A.
AU - Domenici, D.
AU - D'Uffizi, A.
AU - Fantini, A.
AU - Fermani, P.
AU - Fiore, S.
AU - Gajos, A.
AU - Gauzzi, P.
AU - Giovannella, S.
AU - Graziani, E.
AU - Ivanov, V. L.
AU - Johansson, T.
AU - Kang, X.
AU - Kisielewska-Kamińska, D.
AU - Kozyrev, E. A.
AU - Krzemien, W.
AU - Kupsc, A.
AU - Lukin, P. A.
AU - Mandaglio, G.
AU - Martini, M.
AU - Messi, R.
AU - Miscetti, S.
AU - Moricciani, D.
AU - Moskal, P.
AU - Parzych, S.
AU - Passeri, A.
AU - Patera, V.
AU - Perez del Rio, E.
AU - Santangelo, P.
AU - Schioppa, M.
AU - Selce, A.
AU - Solodov, E. P.
PY - 2020/5/10
Y1 - 2020/5/10
N2 - Based on a sample of 300 million KS mesons produced in ϕ→KLKS decays recorded by the KLOE experiment at the DAΦNE e+e− collider we have measured the branching fraction for the decay KS→πμν. The KS mesons are identified by the interaction of KL mesons in the detector. The KS→πμν decays are selected by a boosted decision tree built with kinematic variables and by a time-of-flight measurement. Signal efficiencies are evaluated with data control samples of KL→πμν decays. A fit to the reconstructed muon mass distribution finds 7223±180 signal events. Normalising to the KS→π+π− decay events the result for the branching fraction is B(KS→πμν)=(4.56±0.11stat±0.17syst)×10−4. It is the first measurement of this decay mode and the result allows an independent determination of |Vus| and a test of the lepton-flavour universality.
AB - Based on a sample of 300 million KS mesons produced in ϕ→KLKS decays recorded by the KLOE experiment at the DAΦNE e+e− collider we have measured the branching fraction for the decay KS→πμν. The KS mesons are identified by the interaction of KL mesons in the detector. The KS→πμν decays are selected by a boosted decision tree built with kinematic variables and by a time-of-flight measurement. Signal efficiencies are evaluated with data control samples of KL→πμν decays. A fit to the reconstructed muon mass distribution finds 7223±180 signal events. Normalising to the KS→π+π− decay events the result for the branching fraction is B(KS→πμν)=(4.56±0.11stat±0.17syst)×10−4. It is the first measurement of this decay mode and the result allows an independent determination of |Vus| and a test of the lepton-flavour universality.
KW - ee collisions
KW - K meson
KW - Semileptonic decay
KW - V-US
KW - e(+)e(-) collisions
KW - RADIATIVE-CORRECTIONS
KW - K-0 meson
UR - http://www.scopus.com/inward/record.url?scp=85082179137&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2020.135378
DO - 10.1016/j.physletb.2020.135378
M3 - Article
AN - SCOPUS:85082179137
VL - 804
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
M1 - 135378
ER -
ID: 23878059