A Non - parametric Approach to Measuring the K − π + Amplitudes in D + → K − K + π + Decay
نویسندگان
چکیده
Using a large sample of D+ → K−K+π+ decays collected by the FOCUS photoproduction experiment at Fermilab, we present the first non-parametric analysis of the K−π+ amplitudes in D+ → K−K+π+ decay. The technique is similar to the technique used for our non-parametric measurements of the D+ → K ∗0 e+ν form factors. Although these results are in rough agreement with those of E687, we observe a wider S-wave contribution for the K ∗0 0 (1430) contribution than the standard, PDG [1] Breit-Wigner parameterization. We have some weaker evidence for the existence of a new, D-wave component at low values of the K−π+ mass.
منابع مشابه
The locating-chromatic number for Halin graphs
Let G be a connected graph. Let f be a proper k -coloring of G and Π = (R_1, R_2, . . . , R_k) bean ordered partition of V (G) into color classes. For any vertex v of G, define the color code c_Π(v) of v with respect to Π to be a k -tuple (d(v, R_1), d(v, R_2), . . . , d(v, R_k)), where d(v, R_i) is the min{d(v, x)|x ∈ R_i}. If distinct vertices have distinct color codes, then we call f a locat...
متن کاملStudies of Three-Body B^+→D ̅^* 〖(2007)〗^0 K^+ K ̅^0 and B^0→D^* 〖(2010)〗^- K^+ K ̅^0 Decays
We analyze three-body decays of and . Under the factorization approach, there are tree level diagrams for these decay modes and the transition matrix element of decay is factorized into a form factor multiplied by decay constant and form factor multiplied into weak vertices form factor. The transition matrix element of decay is also factorized into a form factor multiplied into weak vertic...
متن کاملJa n 20 03 Study of the Cabibbo - suppressed decay modes D 0 → π − π + and D 0 → K − K
Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement for the branching ratios of the Cabibbo-suppressed decay modesD0 → π−π+ and D0 → K−K+. We measured: Γ(D0 → K−K+)/Γ(D0 → π−π+) = 2.81 ± 0.10(stat) ± 0.06(syst), Γ(D0 → K−K+)/Γ(D0 → K−π+) = 0.0993 ± 0.0014(stat) ± 0.0014(syst), and Γ(D0 → π−π+)/Γ(D0 → K−π+) = 0.0353 ± 0.0012(stat) ± 0.0006(syst). These values ha...
متن کاملCarbon K edge structures of molecular crystals from first-principles: A comparison between phenanthrene and anthracene
By means of ab-initio calculations on the basis of the FPLAPW method, we compared the energy loss near edge structure (ELNES) of carbon K edges in crystalline phenanthrene and its isomer, anthracene. In these two organic compounds, different non-equivalent carbon atoms can result in distinct K edge spectra due to the different carbon-carbon bond lengths, as a characteristic behavior of the mole...
متن کاملStudy of the Cabibbo - suppressed decay modes
Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement for the branching ratios of the Cabibbo-suppressed decay modesD0 → π−π+ and D0 → K−K+. We measured: Γ(D0 → K−K+)/Γ(D0 → π−π+) = 2.81 ± 0.10(stat) ± 0.06(syst), Γ(D0 → K−K+)/Γ(D0 → K−π+) = 0.0993 ± 0.0014(stat) ± 0.0014(syst), and Γ(D0 → π−π+)/Γ(D0 → K−π+) = 0.0353 ± 0.0012(stat) ± 0.0006(syst). These values ha...
متن کامل