Study of Methods for Finding Double Charm Baryons
Author | : Bimal Bhattarai |
Publisher | : |
Total Pages | : 106 |
Release | : 2005 |
Genre | : Baryons |
ISBN | : |
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Author | : Bimal Bhattarai |
Publisher | : |
Total Pages | : 106 |
Release | : 2005 |
Genre | : Baryons |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 161 |
Release | : 2007 |
Genre | : |
ISBN | : |
In this dissertation I describe a study of double-charm and charm-strange baryons based on data collected with the BABAR Detector at the Stanford Linear Accelerator Center. In this study I search for new baryons and make precise measurements of their properties and decay modes. I seek to verify and expand upon double-charm and charm-strange baryon observations made by other experiments. The BABAR Detector is used to measure subatomic particles that are produced at the PEP-II storage rings. I analyze approximately 300 million e+e- → c{bar c} events in a search for the production of double-charm baryons. I search for the double-charm baryons?{sub cc} (containing the quarks ccd) and?{sup ++}{sub cc} (ccu) in decays to?+{sub c}K−?+ and?+{sub c}K−?+?+, respectively. No statistically significant signals for their production are found, and upper limits on their production are determined. Statistically significant signals for excited charm-strange baryons are observed with my analysis of approximately 500 million e+e- → c{bar c} events. The charged charm-strange baryons?{sub c}(2970)+,?{sub c}(3055)+,?{sub c}(3123)+ are found in decays to?+{sub c}K−?+, the same decay mode used in the?+{sub cc} search. The neutral charm-strange baryon?{sub c}(3077)° is observed in decays to?+{sub c}K?−. I also search for excited charm-strange baryon decays to?+{sub c}K8,?+{sub c}K−,?+{sub c}K8?−?+, and?+{sub c}K−?−?+. No significant charm-strange baryon signals a f h these decay modes. For each excited charm-strange baryon state that I observe, I measure its mass, natural width (lifetime), and production rate. The properties of these excited charm-strange baryons and their decay modes provide constraints for phenomenological models of quark interactions through quantum chromodynamics. My discovery of the two new charm-strange baryons?{sub c}(3055)+ and?{sub c}(3123)+ influences our theoretical understanding of charm-strange baryon states.
Author | : Adam Jacob Edwards |
Publisher | : |
Total Pages | : 168 |
Release | : 2007 |
Genre | : |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 4 |
Release | : 2002 |
Genre | : |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 782 |
Release | : 1995 |
Genre | : Power resources |
ISBN | : |
Author | : Jian Liu |
Publisher | : |
Total Pages | : 128 |
Release | : 2007 |
Genre | : Baryons |
ISBN | : |
Author | : Joseph Alexander Swiatek |
Publisher | : |
Total Pages | : 248 |
Release | : 1995 |
Genre | : |
ISBN | : |
Author | : Brian Aa Petersen |
Publisher | : |
Total Pages | : 8 |
Release | : 2006 |
Genre | : |
ISBN | : |
The authors report on several studies of charm baryon production and decays by the BABAR collaboration. They confirm previous observations of the {Xi}'{sub c}{sup 0/+}, {Xi}{sub c}(2980){sup +} and {Xi}{sub c}(3077){sup +} baryons, measure branching ratios for Cabibbo-suppressed {Lambda}{sub c}{sup +} decays and use baryon decays to study the properties of the light-quark baryons, {Omega}{sup -} and {Xi}(1690){sup 0}.
Author | : |
Publisher | : |
Total Pages | : 412 |
Release | : 1999 |
Genre | : Hadrons |
ISBN | : |
Author | : Mark Edward Mattson |
Publisher | : |
Total Pages | : 0 |
Release | : 2002 |
Genre | : |
ISBN | : |