Measurement of the decay asymmetry parameters in 5"-H IT+ Article

Chan, S, Eigen, G, Lipeles, E et al. (2001). Measurement of the decay asymmetry parameters in 5"-H IT+ . PHYSICAL REVIEW D, 63(11), 10.1103/PhysRevD.63.111102

cited authors

  • Chan, S; Eigen, G; Lipeles, E; Miller, JS; Schmidtler, M; Shapiro, A; Sun, WM; Urheim, J; Weinstein, AJ; Würthwein, F; Jaffe, DE; Masek, G; Paar, HP; Potter, EM; Prell, S; Sharma, V; Asner, DM; Eppich, A; Gronberg, J; Hill, TS; Lange, DJ; Morrison, RJ; Nelson, HN; Nelson, TK; Roberts, D; Behrens, BH; Ford, WT; Gritsan, A; Krieg, H; Roy, J; Smith, JG; Alexander, JP; Baker, R; Bebek, C; Berger, BE; Berkelman, K; Boisvert, V; Cassel, DG; Crowcroft, DS; Dickson, M; von Dombrowski, S; Drell, PS; Ecklund, KM; Ehrlich, R; Foland, AD; Gaidarev, P; Gibbons, L; Gittelman, B; Gray, SW; Hartill, DL; Heltsley, BK; Hopman, PI; Kreinick, DL; Lee, T; Liu, Y; Mistry, NB; Ng, CR; Nordberg, E; Ogg, M; Patterson, JR; Peterson, D; Riley, D; Soffer, A; Valant-Spaight, B; Warburton, A; Ward, C; Athanas, M; Avery, P; Jones, CD; Lohner, M; Prescott, C; Rubiera, AI; Yelton, J; Zheng, J; Brandenburg, G; Briere, RA; Ershov, A; Gao, YS; Kim, DYJ; Wilson, R; Browder, TE; Li, Y; Rodriguez, JL; Yamamoto, H; Bergfeld, T; Eisenstein, BI; Ernst, J; Gladding, GE; Gollin, GD; Hans, RM; Johnson, E; Karliner, I; Marsh, MA; Palmer, M; Selen, M; Thaler, JJ; Edwards, KW; Bellerive, A; Janicek, R; Patel, PM

authors

abstract

  • Using the CLEO II detector at the Cornell Electron Storage Ring we have measured the Ξc0 decay asymmetry parameter in the decay Ξc0→Ξ-π+. We find αξ c0αΞ = -0.26±0.18(stat)-0.04+0.05(syst); using the world average value of αΞ= -0.456±0.014 we obtain a=o=-0.56±0.39(stat)-0.09+0.10(syst). The physically allowed range of a decay asymmetry parameter is -1<α<+1. Our result prefers a negative value: αξ c0 is <0.1 at the 90% C.L. The central value occupies the middle of the theoretically expected range but is not yet precise enough to choose between models. ©2001 The American Physical Society.

publication date

  • January 1, 2001

published in

Digital Object Identifier (DOI)

volume

  • 63

issue

  • 11