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Abstract: (arXiv)
We report a study of semileptonic B decays to P-wave D** mesons. Semileptonic decays to D*_0 and D*_2 mesons are observed for the first time and their branching ratios are measured to be Br(B+ -> anti-D*0_0 l+ nu) x Br(anti-D*0_0 -> D- pi+) = 0.24+-0.04(stat.)+-0.06(syst.) % and Br(B+ -> anti-D*0_2 l+ nu) x Br(anti-D*0_2 -> D- pi+) = 0.22+-0.03(stat.)+-0.04(syst.)%. The results are obtained using the full reconstruction tagging method from a data sample that contains 657 millions BB-bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.Note:
- 12 pages, 4 figures, submitted to PRD(RC)
- 13.20.-v
- 13.20.He
- 14.40.Lb
- electron positron: colliding beams
- electron positron: annihilation
- Upsilon(10570): electroproduction
- B: pair production
- B: leptonic decay
- D*(2010): hadronic decay
- D*2(2460): hadronic decay
References(26)
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