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First Observation of B -> D(*) rho', rho' -> omega pi-

High Energy Physics - Experiment 2010-05-28 v3
Authors: J. Alexander , CLEO Collaboration
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Abstract

We report on the observation of B-> D(*) pi+ pi- pi- pi^o decays. The branching ratios for D*+ and D*o are (1.72+/-0.14+/-0.24)% and (1.80+/-0.24+/-0.27)%, respectively. Each final state has a D* omega pi- component, with branching ratios (0.29+/-0.03+/-0.04)% and (0.45+/-0.10+/-0.07)% for the D*+ and D*o modes, respectively. We also observe B -> D omega pi- decays. The branching ratios for D+ and Do are (0.28+/-0.05+/-0.04)% and (0.41+/-0.07+/-0.06)%, respectively. A spin parity analysis of the D omega pi- final state prefers a wide 1^- resonance. A fit to the omega pi- mass spectrum finds a central mass of (1349+/-25^{+10}_{-5}) MeV and width of (547+/-86^{+46}_{-45}) MeV. We identify this object as the rho(1450) or the \rho'.

Keywords

B decays rho prime omega pi branching ratios spin parity resonance

Cite

@article{arxiv.hep-ex/0103021,
  title  = {First Observation of B -> D(*) rho', rho' -> omega pi-},
  author = {J. Alexander and CLEO Collaboration},
  journal= {arXiv preprint arXiv:hep-ex/0103021},
  year   = {2010}
}

Comments

42 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS, To Appear in PRD

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