Phys. Rev. D 64, 092001 (2001) [23 pages]

First observation of B̅ →D(*)ρ′-, ρ′-→ωπ-

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J. P. Alexander et al. (CLEO Collaboration)
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Received 9 March 2001; published 18 September 2001

We report on the observation of B̅ →D*π+π-π-π0 decays. The branching ratios for D*+ and D*0 are (1.72±0.14±0.24)% and (1.80±0.24±0.27)%, respectively. Each final state has a D*ωπ- component, with branching ratios (0.29±0.03±0.04)% and (0.45±0.10±0.07)% for the D*+ and D*0 modes, respectively. We also observe B̅ →Dωπ- decays. The branching ratios for D+ and D0 are (0.28±0.05±0.04)% and (0.41±0.07±0.06)%, respectively. A spin parity analysis of the ωπ- system in the Dωπ- final state shows a preference for a wide 1- resonance. A fit to the ωπ- mass spectrum finds a central mass of (1349±25-5+10) MeV and width of (547±86-45+46) MeV. We identify this object as the ρ(1450) or the ρ.


©2001 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevD.64.092001
DOI: 10.1103/PhysRevD.64.092001
PACS: 13.25.Hw, 13.65.+i, 14.40.Cs

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