Inclusive production of the charmed baryon Λc+ from e+e− annihilations at s=10.55 GeV
Year: 1991
Type: article
Abstract: We report results on inclusive production of the charmed baryon ${{\ensuremath{\Lambda}}_{c}}^{+}$ from ${e}^{+}{e}^{\ensuremath{-}}$ annihilations at $\sqrt{s}=10.5$ GeV. Measurements are presented of the inclusive cross section times branching fraction for the continuum production of ${{\ensuremath{\Lambda}}_{c}}^{+}$ as observed in six different decay modes, and of a new, improved value of the ${{\ensuremath{\Lambda}}_{c}}^{+}$ mass. The inclusive cross section times the branching fraction into $p{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ is measured to be 10.0\ifmmode\pm\else\textpm\fi{}1.5\ifmmode\pm\else\textpm\fi{}1.5 pb summed over all ${x}_{p}$. The branching fractions of ${{\ensuremath{\Lambda}}_{c}}^{+}$ into $p{\overline{K}}^{0}$, $p{\overline{K}}^{0}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, $\ensuremath{\Lambda}{\ensuremath{\pi}}^{+}$, $\ensuremath{\Lambda}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$, and ${\ensuremath{\Xi}}^{\ensuremath{-}}{K}^{+}{\ensuremath{\pi}}^{+}$ relative to that into $p{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ are measured to be 0.44\ifmmode\pm\else\textpm\fi{}0.07\ifmmode\pm\else\textpm\fi{}0.05, 0.43\ifmmode\pm\else\textpm\fi{}0.12\ifmmode\pm\else\textpm\fi{}0.04, 0.18\ifmmode\pm\else\textpm\fi{}0.03\ifmmode\pm\else\textpm\fi{}0.03, 0.65\ifmmode\pm\else\textpm\fi{}0.11\ifmmode\pm\else\textpm\fi{}0.12, and 0.15\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.03, respectively. The ${{\ensuremath{\Lambda}}_{c}}^{+}$ mass is measured to be 2284.7\ifmmode\pm\else\textpm\fi{}0.6\ifmmode\pm\else\textpm\fi{}0.7 MeV/${\mathit{c}}^{2}$. The measured momentum distributions for continuum production of ${{\ensuremath{\Lambda}}_{c}}^{+}$ are compared to analytical fragmentation functions and to other measurements.
Authors: P. Avery, D. Besson, L. Garren, J. Yelton, K. Kinoshita, F. M. Pipkin, M. Procario, Richard Wilson, J. Wolinski, D. Xiao, Y. Zhu, R. Ammar, P. Baringer, D. Coppage, P. Haas, N. Kwak, Ha Lam, S. Ro, Y. Kubota, J. K. Nelson, D. Perticone, R. Poling, R. Fulton, T. Jensen, D. R. Johnson, H. Kagan, R. Kass, F. Morrow, J. Whitmore, P. Wilson, D. Bortoletto, W. -Y. Chen, J. Dominick, R. L. McIlwain, D. H. Miller, C. R. Ng, S. F. Schaffner, E. I. Shibata, I. P. J. Shipsey, W. -M. Yao, K. Sparks, E. H. Thorndike, C. -H. Wang, M. S. Alam, I. J. Kim, W. C. Li, X. C. Lou, V. Romero, C. R. Sun, P. -N. Wang, M. M. Zoeller, M. Goldberg, T. Haupt, N. Horwitz, V. Jain, M. D. Mestayer, G. C. Moneti, Y. Rozen, P. Rubin, V. Sharma, T. Skwarnicki, M. Thulasidas, G. Zhu, S. E. Csorna, T. Letson, J. Alexander, M. Artuso, C. Bebek, K. Berkelman, T. Browder, D. G. Cassel, E. Cheu, D. M. Coffman, G. Crawford, J. W. DeWire, P. S. Drell, R. Ehrlich, R. S. Galik, B. Gittelman, S. W. Gray, A. M. Halling, D. L. Hartill, B. K. Heltsley, J. Kandaswamy, N. Katayama, D. L. Kreinick, J. D. Lewis, G. S. Ludwig, N. B. Mistry, J. Mueller, S. Nandi, E. Nordberg, C. O'Grady, D. Peterson, M. Pisharody, D. Riley, M. Sapper, M. Selen, A. Silverman, S. Stone, H. Worden, M. Worris, A. J. Sadoff
Institutions: University of Florida, Harvard University, University of Kansas, University of Minnesota, The Ohio State University, Purdue University West Lafayette, University of Rochester, State University of New York, University at Albany, State University of New York, Syracuse University, Vanderbilt University, Cornell University, Ithaca College
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2139124342