We present a Kπ mass spectrum analysis of the four-body semileptonic charm decay D+→K-π+μ+ν in the range of 0.65 GeV/c2<1.5 GeV/c2. We observe a non-resonant contribution of 5.30±0.74-0.96+0.99% with respect to the total D+→K-π+μ+ν decay. For the K*(892)0 resonance, we obtain a mass of 895.41±0.32-0.43+0.35 MeV/c2, a width of 47.79±0.86-1.06+1.32 MeV/c2, and a Blatt-Weisskopf damping factor parameter of 3.96±0.54-0.90+1.31 GeV-1. We also report 90% CL upper limits of 4% and 0.64% for the branching ratios Γ(D+→K̄*(1680)0μ+ν)Γ(D+→K-π+μ+ν) and Γ(D+→K̄0*(1430)0μ+ν) Γ(D+→K-π+μ+ν), respectively. © 2005 Published by Elsevier B.V.

Hadronic mass spectrum analysis of D+ → K -π+μ+ν decay and measurement of the K* (892)0 mass and width

Boca G.;Liguori G.;Merlo M. M.;Ratti S. P.;Riccardi C.;Vitulo P.;
2005

Abstract

We present a Kπ mass spectrum analysis of the four-body semileptonic charm decay D+→K-π+μ+ν in the range of 0.65 GeV/c2<1.5 GeV/c2. We observe a non-resonant contribution of 5.30±0.74-0.96+0.99% with respect to the total D+→K-π+μ+ν decay. For the K*(892)0 resonance, we obtain a mass of 895.41±0.32-0.43+0.35 MeV/c2, a width of 47.79±0.86-1.06+1.32 MeV/c2, and a Blatt-Weisskopf damping factor parameter of 3.96±0.54-0.90+1.31 GeV-1. We also report 90% CL upper limits of 4% and 0.64% for the branching ratios Γ(D+→K̄*(1680)0μ+ν)Γ(D+→K-π+μ+ν) and Γ(D+→K̄0*(1430)0μ+ν) Γ(D+→K-π+μ+ν), respectively. © 2005 Published by Elsevier B.V.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11571/1351977
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