Charm Physics at CLEO-c

✍ Scribed by David H. Miller

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 259 KB
• Volume: 185
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/j.nuclphysbps.2008.10.012

✦ Synopsis

The latest results are presented from CLEO-c on W annihilation decays of the D + and D + s mesons. This includes the decay constants and the first observation of the decay D + s → pn. Presented here is the final result for the D + from the complete data set of 818 pb -1 and an updated result for the D + s from 400 pb -1 of the total data set of 600 pb -1 The final result is f D + = (205.8 ± 8.5 ± 2.5) MeV, and the preliminary value for the D + s is f D + s = (267.9 ± 8.2 ± 3.9) MeV, where both results are radiatively corrected. The recent most precise unquenched Lattice-QCD calculation for the D + agree with this result but are in disagreement with the D + s . Using almost identical analysis techniques the decay D + s → pn has been observed with a branching fraction B(D + s → pn) = (1.30 ± 0.36 +0.12 -0.16 ) × 10 -3 .