Excited charmed mesons decaying to D??+ are studied by performing fits to the Dalitz plots of B+ ?D? K+?+ and B+ ? D.??+? + candidates. A structure at m (D??.+) 2:78 GeV=c2 in the D? K+?+ data sample is determined to have spin-1 for the first time.
Since the D meson is the lightest meson which contains a charm quark, it must change that charm quark to some other quark in order to decay . Transmutations of quarks occurs by the weak interaction, which changes the charm quark to a strange quark with a W particle. This weak interaction process is indicated in both of the decays above.
Semi-Leptonic B Meson Decays to Excited D Mesons 3 is the relative (CM) coordinate, x x 1 ?x 2 (X (m 1x 1 +m 2x 2 )=(m 1 +m 2), where the m i represent the quark masses). The functionU is given by U(P)= 1 2 p 2 [(?? 5P s(v)+i? V (v))(1+iv ?)] (2.2) where P s(V s) represents the pseudoscalar (vector) meson eld, and v P =M [P (M) is the, To estimate the width of the latter we need the decay constant of the radially excited D – meson that we computed in lattice QCD with N f = 2 dynamical flavors and after taking the continuum limit we found f D ? = 117 (25) MeV. We also provide an update for the values of the D – meson decay constants obtained by using maximally twisted mass QCD.
D Meson – Georgia State University, D meson – Wikipedia, D Meson – Georgia State University, D Meson – Georgia State University, A. Hadronic decays into meson states 36 B. Baryonic decay D+ s ?p+¯n 37 IX. DALITZ DECAYS OF D MESONS 39 A. Three-body Dalitz plot analyses 39 1. Formalism for Dalitz plot ?ts 39 2. Experimental considerations 40 3.
excited Dmeson states. First experimental data on some exclusive Bdecay channels to excited charmed mesons are becoming available now [1{3] and more data are expected in near future. Thus the comprehensive theoretical study of these decays is necessary. The presence of the heavy quark in the initial and nal meson states in these decays consider-, Excited charmed mesons decaying to D ? ? + are studied by performing fits to the Dalitz plots of B + ? D ? K + ? + and B + ? D ? ? + ? + candidates. A structure at m(D ? ? +) ? 2.78 GeV/ c2 in the data sample is determined to have spin-1 for the first time.
Using an approximately 1fb^{ -1} data sample from the Upsilon (4S) resonance taken with the CLEO II detector at CESR, we have detected several B^- and B^0 exclusive decay modes into either D ^{* +} or D ^{* 0} together with 1-3 charged or neutral pions. We present branching ratios and new determinations of B meson masses in these modes. The large data sample has …
