New Measurements of the D + s → φ μ + ν Form Factor Ratios
نویسندگان
چکیده
Using a large sample of D s → φ μν decays collected by the FOCUS photoproduction experiment at Fermilab, we present new measurements of two semileptonic form factor ratios: rv and r2. We find rv = 1.549 ± 0.250 ± 0.145 and r2 = 0.713± 0.202± 0.266. These values are consistent with rv and r2 form factors measured for the process D → K∗0l+νl.
منابع مشابه
) Γ ( D + s → φ π + ) Branching Ratios
Using a large sample of charm semileptonic decays collected by the FOCUS photoproduction experiment at Fermilab, we present new measurements of two semileptonic branching ratios. We obtain values of Γ(D + →K ∗0 μν) Γ(D+→K−π+π+) = 0.602 ± 0.010 (stat) ± 0.021 (sys) and Γ(D + s →φ μ ν) Γ(D s →φ π+) = 0.54 ± 0.033 (stat) ± 0.048 (sys). Our D+ → K ∗0 μ+ν result includes the effects of the s-wave in...
متن کاملNew Measurements of the D + → K ∗ 0 μ + ν Form Factor Ratios
Using a large sample of D → Kπμν decays collected by the FOCUS photoproduction experiment at Fermilab, we present new measurements of two semileptonic form factor ratios: rv and r2. We find rv = 1.504 ± 0.057 ± 0.039 and r2 = 0.875 ± 0.049 ± 0.064. Our form factor results include the effects of the s-wave interference discussed in Reference [1].
متن کاملMeasurements of the q 2 dependence of the D 0 → K − μ + ν and D 0 → π − μ + ν form factors
Using a large sample of D0 → K−μ+ν and D0 → π−μ+ν decays collected by the FOCUS photoproduction experiment at Fermilab, we present new measurements of the q2 dependence for the f+(q 2) form factor. These measured f+(q 2) form factors are fit to common parameterizations such as the pole dominance form. We find mpole = 1.93 ± 0.05 ± 0.03 GeV/c 2 for D0 → K−μ+ν and mpole = 1.91 +0.30 −0.15 ± 0.07 ...
متن کاملSe p 20 05 A Non - parametric Approach to the D + → K ∗ 0 μ + ν Form Factors
Using a large sample of D+ → K−π+μ+ν decays collected by the FOCUS photoproduction experiment at Fermilab, we present the first measurements of the helicity basis form factors free from the assumption of spectroscopic pole dominance. We also present the first information on the form factor that controls the s-wave interference discussed in a previous paper by the FOCUS collaboration. We find go...
متن کاملRESIDUAL OF IDEALS OF AN L-RING
The concept of right (left) quotient (or residual) of an ideal η by anideal ν of an L-subring μ of a ring R is introduced. The right (left) quotients areshown to be ideals of μ . It is proved that the right quotient [η :r ν ] of an idealη by an ideal ν of an L-subring μ is the largest ideal of μ such that[η :r ν ]ν ⊆ η . Most of the results pertaining to the notion of quotients(or residual) of ...
متن کامل