A Study of the semileptonic charm decays D0 --->pi- e+ nu(e), D+ ---> pi0 e+ nu(e), D0 ---> K- e+ nu(e), and D+ ---> anti-K0 e+ nu(e)
Collaboration
18 pages
Published in:
- Phys.Rev.D 77 (2008) 112005
e-Print:
- 0712.1020 [hep-ex]
Report number:
- CLNS-06-1968,
- CLEO-06-13
Experiments:
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Citations per year
Abstract: (arXiv)
Using a sample of 1.8 million DDbar meson pairs collected at the psi(3770) with the CLEO-c detector, we study the semileptonic decays D^0 -> pi^- e^+ nu_e, D^+ -> pi^0 e^+ \nu_e, D^0 -> K^- e^+ \nu_e, and D^+ -> Kbar^0 e^+ nu_e. For the total branching fractions we find B(D^0 -> pi^- e^+ \nu_e) = 0.299(11)(9)%, B(D^+ -> pi^0 e^+ \nu_e) = 0.373(22)(13)%, B(D^0 -> K^- e^+ nu_e) = 3.56(3)(9)%, and B(D^+ -> Kbar^0 e^+ nu_e) = 8.53(13)(23)%, where the first error is statistical and the second systematic. In addition, form factors are studied through fits to the partial branching fractions obtained in five q^2 ranges. By combining our results with recent unquenched lattice calculations, we obtain |Vcd| = 0.217(9)(4)(23) and |Vcs| = 1.015(10)(11)(106), where the final error is theoretical.Note:
- 18 pages, postscript also available through http://www.lns.cornell.edu/public/CLNS/2006/, submitted to PRD
- 12.15.Hh
- 13.20.Fc
- 14.40.Lb
- electron positron: colliding beams
- psi(3770): electroproduction
- D: pair production
- D: semileptonic decay
- D+: branching ratio
- D0: branching ratio
- decay: form factor
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