Title

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

Document Type

Article

Publication Date

11-1-2001

Abstract

We report on the observation of B̄→D*π π π π decays. The branching ratios for D* and D* are (1.72±0.14±0.24)% and (1.80±0.24±0.27)%, respectively. Each final state has a 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* modes, respectively. We also observe B̄→Dωπ decays. The branching ratios for D and D 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 ) MeV and width of (547±86 ) MeV. We identify this object as the ρ(1450) or the ρ′. ©2001 The American Physical Society. + - - 0 + 0 - + 0 - + 0 - - - - +10 +46 -5 -45

Publication Name

Physical Review D

Volume Number

64

Issue Number

9

Article

092001

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