Observation of a Broad L=1 $c\bar{q}$ State in $B^{-}\to D^{*+}π^{-}π^{-}$ at CLEO

Details Observation of a Broad L=1 $c\bar{q}$ State in $B^{-}\to D^{*+}π^{-}π^{-}$ at CLEO Observation of a Broad L=1 $c\bar{q}$ State in $B^{-}\to D^{*+}π^{-}π^{-}$ at CLEO

1999-08-03

arxiv.org/abs/hep-ex/9908009v1

Nucl.Phys.A663:647-650,2000

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS

Scientific paper

10.1016/S0375-9474(99)00697-1

Using 4.7 fb^-1 of data taken at CESR at energies at and near the Upsilon(4S) we have studied the decay B- -> D{*+}pi-pi- (and its conjugate). We observe a new, broad charmed meson state, which we interpret as D_J(j=1/2), in its decay to D{*+}pi-. Our preliminary results indicate the mass and width of this L=1 state to be m = (2461 +41/-3} +/-10 +/-32) MeV and Gamma = (290 +101/-79 +/-26 +/-36) MeV, with the third uncertainty associated with the parameterization of the relative strong phases. In addition we have measured several new branching fractions of charged B mesons. All quoted results are preliminary.

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