Evidence for B Semileptonic Decays Into the Lambda_c Charm Baryon
Author | : |
Publisher | : |
Total Pages | : 16 |
Release | : 2008 |
ISBN-10 | : OCLC:893410677 |
ISBN-13 | : |
Rating | : 4/5 ( Downloads) |
Download or read book Evidence for B Semileptonic Decays Into the Lambda_c Charm Baryon written by and published by . This book was released on 2008 with total page 16 pages. Available in PDF, EPUB and Kindle. 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.