Measurement of the [ital D][r arrow][pi][pi] branching fractions

Journal Article · Mon Sep 27 00:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.1973· OSTI ID:6132706

Selen, M; Sadoff, A J; Ammar, R; Ball, S; Baringer, P; Coppage, D; Copty, N; Davis, R; Hancock, N; Kelly, M; Kwak, N; Lam, H; Kubota, Y; Lattery, M; Nelson, J K; Patton, S; Perticone, D; Poling, R; Savinov, V; Schrenk, S ; Wang, R; Alam, M S; Kim, I J; Nemati, B; O'Neill, J J; Severini, H; Sun, C R; Zoeller, M M; Crawford, G; Daubenmeir, C M; Fulton, R; Fujino, D; Gan, K K; Honscheid, K; Kagan, H; Kass, R; Lee, J; Malchow, R; Morrow, F; Skovpen, Y; Sung, M; White, C; Whitmore, J; Wilson, P; Butler, F; Fu, X; Kalbfleisch, G; Lambrecht, M; Ross, W R; Skubic, P; Snow, J; Wang, P L; Wood, M; Bortoletto, D; Brown, D N; Fast, J; McIlwain, R L; Miao, T; Miller, D H; Modesitt, M; Schaffner, S F; Shibata, E I; Shipsey, I P.J.; Wang, P N; Battle, M; Ernst, J; Kroha, H; Roberts, S; Sparks, K; Thorndike, E H; Wang, C H; Dominick, J; Sanghera, S; Skwarnicki, T; Stroynowski, R; Artuso, M; He, D; Goldberg, M; Horwitz, N; Ken,

Using data from CLEO II at the Cornell Electron Storage Ring we provide a new measurement of the branching fraction for [ital D][sup 0][r arrow][pi][sup +][pi][sup [minus]], and we present the first measurements of [ital D][sup 0][r arrow][pi][sup 0][pi][sup 0] and of [ital D][sup +][r arrow][pi][sup +][pi][sup 0], which is due to an isospin changing [Delta][ital I]=3/2 transition. From these data we extract the ratio of isospin amplitudes [vert bar][ital A][sub 2]/[ital A][sub 0][vert bar], and the cosine of the relative phase [delta]=[delta][sub 2][minus][delta][sub 0] between these amplitudes, for [ital D][r arrow][pi][pi] decays. Unlike the situation in kaon decay where [ital A][sub 2] is strongly suppressed, we find [vert bar][ital A][sub 2]/[ital A][sub 0][vert bar]=0.72[plus minus]0.13[plus minus]0.11 and cos[delta]=0.14[plus minus]0.13[plus minus]0.09.

• OSTI ID: 6132706
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 71:13; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

662350* -- Decays of Mesons-- (1992-)
662420 -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BOSONS
BRANCHING RATIO
CHARM PARTICLES
CHARMED MESONS
D MESONS
DECAY
ELEMENTARY PARTICLES
HADRONS
ISOSPIN
MESONS
PARTICLE DECAY
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS