New measurement of BR(D+→ρ0μ+ν)BR(D+→K¯∗0μ+ν) branching ratio

Using data collected by the FOCUS experiment at Fermilab, we present a new measurement of the charm semileptonic branching ratio BR(D+→ρ0μ+ν)BR(D+→K¯∗0μ+ν). From a sample of 320±44 and 11372±161D+→ρ0μ+ν and D+→K−π+μ+ν events respectively, we find BR(D+→ρ0μ+ν)BR(D+→K¯∗0μ+ν)=0.041±0.006(stat)±0.004(syst).