Observation of D1 (2420)+ and D2*(2460)+ Article

Bergfeld, T, Eisenstein, BI, Gollin, G et al. (1994). Observation of D1 (2420)+ and D2*(2460)+ . PHYSICS LETTERS B, 340(3), 194-204. 10.1016/0370-2693(94)01348-9

cited authors

  • Bergfeld, T; Eisenstein, BI; Gollin, G; Ong, B; Palmer, M; Selen, M; Thaler, JJ; Edwards, KW; Ogg, M; Bellerive, A; Britton, DI; Hyatt, ERF; MacFarlane, DB; Patel, PM; Spaan, B; Sadoff, AJ; Ammar, R; Baringer, P; Bean, A; Besson, D; Coppage, D; Copty, N; Davis, R; Hancock, N; Kelly, M; Kotov, S; Kravchenko, I; Kwak, N; Lam, H; Kubota, Y; Lattery, M; Momayezi, M; Nelson, JK; Patton, S; Poling, R; Savinov, V; Schrenk, S; Wang, R; Alam, MS; Kim, IJ; Ling, Z; Mahmood, AH; O'Neill, JJ; Severini, H; Sun, CR; Wappler, F; Crawford, G; Daubenmier, CM; Fulton, R; Fujino, D; Gan, KK; Honscheid, K; Kagan, H; Kass, R; Lee, J; Malchow, R; Sung, M; White, C; Zoeller, MM; Butler, F; Fu, X; Nemati, B; Ross, WR; Skubic, P; Wood, M; Bishai, M; Fast, J; Gerndt, E; Hinson, JW; McIlwain, RL; Miao, T; Miller, DH; Modesitt, M; Payne, D; Shibata, EI; Shipsey, IPJ; Wang, PN; Battle, M; Ernst, J; Gibbons, L; Kwon, Y; Roberts, S; Thorndike, EH; Wang, CH; Dominick, J; Lambrecht, M; Sanghera, S; Shelkov, V; Skwarnicki, T; Stroynowski, R; Volobouev, I; Wei, G; Zadorozhny, P; Artuso, M; Gao, M; Goldberg, M; He, D; Horwitz, N; Moneti, GC; Mountain, R

authors

abstract

  • Using the CLEO II detector at CESR, we have observed two charmed states, where the higher mass state decays to D0π+ and to D*0π+, while the lower mass state decays to D*0π+, but not to D0π+. The masses and widths were measured to be 2425±2±2 MeV/c2 and 26-7-4+8+4 MeV/c2 for the lower mass state, and 2463±3±3 MeV/c2 and 27-8-5+11+5 MeV/c2 for the higher mass state. Properties of these states, including their decay angular distributions and spin-parity assignments have been studied. The results of this analysis support the identification of these states as the charged L = 1 D1 (2420)+ and D2* (2460)+, respectively. The isospin mass splittings between these states and their neutral partners have also been measured. This is the first full reconstruction of any decay mode of the D1 (2420)+ and the first observation of the decay of D2* (2460)+ to D*0π+. © 1994.

publication date

  • December 8, 1994

published in

Digital Object Identifier (DOI)

start page

  • 194

end page

  • 204

volume

  • 340

issue

  • 3