Evidence for B Semileptonic Decays Into the Lambda_c Charm Baryon
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| Author | : |
| Publisher | : |
| Total Pages | : 16 |
| Release | : 2008 |
| ISBN-10 | : OCLC:893410677 |
| ISBN-13 | : |
| Rating | : 4/5 (77 Downloads) |
Book Synopsis Evidence for B Semileptonic Decays Into the Lambda_c Charm Baryon by :
Book excerpt: We present the first evidence for B semileptonic decays into the charmed baryon [Lambda]{sub c} based on 420 fb−1 of data collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II ee− storage rings. Events are tagged by fully reconstructing one of the B mesons in a hadronic decay mode. We measure the relative branching fraction [Beta]({bar B} 2![Lambda]{sub c}+ Xl−{bar {nu}}{sub {ell}})/[Beta]({bar B} 2![Lambda]{sub c}+/{bar {Lambda}}{sub c}−X) = (3.2 ± 0.9{sub stat.} ± 0.9{sub syst.})%. The significance of the signal including the systematic uncertainty is 4.9 standard deviations.
