Investigation of semileptonic B meson decay to P wave charm mesons
Aug, 199710 pages
Published in:
- Phys.Rev.Lett. 80 (1998) 4127-4131
e-Print:
- hep-ex/9708035 [hep-ex]
PDG: ,
Report number:
- SLAC-PUB-9836,
- CLNS-97-1501,
- CLEO-97-17
Experiments:
Citations per year
Abstract:
We have studied semileptonic meson decays with a P-wave charm meson in the final state using 3.29 x 10^6 B\bar{B} events collected by the CLEO~II detector at the Cornell Electron-positron Storage Ring. We find a value for the exclusive semileptonic product branching fraction: Br(B^- -> D_1^0 l^- \bar{\nu}) x Br(D_1^0 -> D^{*+}\pi^-) = (0.373 \pm 0.085 \pm 0.052 \pm 0.024)% and an upper limit for Br(B^- -> D_2^{*0} l^- \bar{\nu}) x Br(D_2^{*0} -> D^{*+}\pi^-) < 0.16%$ (90% C.L.). These results indicate that at least 20% of the total B^- semileptonic rate is unaccounted for by the observed exclusive decays, B^- -> D^0 l^- \bar{\nu}, B^- -> D^{*0} l^- \bar{\nu}, B^- -> D_1^0 l^- \bar{\nu}, and B^- -> D_2^{*0} l^- \bar{\nu}.Note:
- 10 page postscript file, postscript file also available through http://w4.lns.cornell.edu/public/CLNS Report-no: CLNS 97/1501, CLEO 97-17
- electron positron: colliding beams
- electron positron: annihilation
- Upsilon(10570): electroproduction
- B: pair production
- B-: semileptonic decay
- charmed meson: production
- D1(2420): hadronic decay
- D*2(2460): hadronic decay
- D*(2010)
- B-: branching ratio
References(13)
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