Measurement of the Branching Fractions of anti-B ---> D** l- anti-nu(l) Decays in Events Tagged by a Fully Reconstructed B Meson - INSPIRE

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Measurement of the Branching Fractions of anti-B ---> D** l- anti-nu(l) Decays in Events Tagged by a Fully Reconstructed B Meson

BaBar

Collaboration

Aug, 2008

7 pages

Published in:

Phys.Rev.Lett. 101 (2008) 261802

e-Print:

0808.0528 [hep-ex]

DOI:

10.1103/PhysRevLett.101.261802

PDG:

{{\mathit B}^{+}}

\rightarrow

{{\overline{\mathit D}}_{{{1}}}{(2420)}^{0}}{{\mathit \ell}^{+}}{{\mathit \nu}_{{{{{\mathit \ell}}}}}}

{{\overline{\mathit D}}_{{{1}}}^{0}}

\rightarrow

{{\mathit D}^{*-}}{{\mathit \pi}^{+}}

Report number:

SLAC-PUB-13351,
BABAR-PUB-08-028

Experiments:

SLAC-PEP2-BABAR

View in:

reference search63 citations

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Abstract: (arXiv)

We report a measurement of the branching fractions of Bbar -> D** l^- nubar_l decays based on 417 fb-1 of data collected at the Upsilon(4S) resonance with the BaBar detector at the PEP-II e+e- storage rings. Events are selected by fully reconstructing one of the B mesons in a hadronic decay mode. A fit to the invariant mass differences m(D(*)pi)-m(D(*)) is performed to extract the signal yields of the different D** states. We observe the Bbar -> D** l^- nubar_l decay modes corresponding to the four D** states predicted by Heavy Quark Symmetry with a significance greater than six standard deviations including systematic uncertainties.

Note:

7 pages, 1 postscript figure, submitted to Phys. Rev. Lett

13.20.He
12.38.Qk
14.40.Nd
electron positron: annihilation
B: pair production
heavy quark
quark: symmetry
anti-B: semileptonic decay
anti-B: branching ratio
D*2(2460): intermediate state

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