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Branching fraction measurements of the color-suppressed decays B̅^0 to D^((*)0_π^(0), D^((*)0)η, D^((*)0)ω, and D^((*)0)η′ and measurement of the polarization in the decay B̅ 0→D^(*0)ω

Lees, J. P. and Cheng, C. H. and Doll, D. A. and Echenard, B. and Flood, K. T. and Hitlin, D. G. and Ongmongkolkul, P. and Porter , F. C. and Rakitin, A. Y. (2011) Branching fraction measurements of the color-suppressed decays B̅^0 to D^((*)0_π^(0), D^((*)0)η, D^((*)0)ω, and D^((*)0)η′ and measurement of the polarization in the decay B̅ 0→D^(*0)ω. Physical Review D, 84 (11). p. 112007. ISSN 2470-0010. https://resolver.caltech.edu/CaltechAUTHORS:20120202-093823043

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Abstract

We report updated branching fraction measurements of the color-suppressed decays B̅ ^(0) → D^(0)π^(0), D^(*0)π^(0), D^(0)η, D^(*0)η, D^(0)ω, D^(*0)ω, D^(0)η′, and D^(*0)η′. We measure the branching fractions (×10^(-4)): B(B̅^0 → D^(0)π^(0)) = 2.69±0.09±0.13, B(B̅^(0) → D^(*0)π^(0)) = 3.05±0.14±0.28, B(B̅^(0) → D^(0)η) = 2.53±0.09±0.11, B(B̅^(0) → D^(*0)η) = 2.69±0.14±0.23, B(B̅^(0) → D^(0)ω) = 2.57±0.11±0.14, B(B̅^(0) → D^(*0)ω) = 4.55±0.24±0.39, B(B̅^(0)→D^(0)η′) = 1.48±0.13±0.07, and B(B̅^(0) → D^(*0)n′) = 1.49±0.22±0.15. We also present the first measurement of the longitudinal polarization fraction of the decay channel D*0ω, fL=(66.5±4.7±1.5)%. In the above, the first uncertainty is statistical and the second is systematic. The results are based on a sample of (454±5)×10^6 BB̅ pairs collected at the Υ(4S) resonance, with the BABAR detector at the PEP-II storage rings at SLAC. The measurements are the most precise determinations of these quantities from a single experiment. They are compared to theoretical predictions obtained by factorization, Soft Collinear Effective Theory (SCET) and perturbative QCD (pQCD). We find that the presence of final state interactions is favored and the measurements are in better agreement with SCET than with pQCD.


Item Type:Article
Related URLs:
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http://dx.doi.org/10.1103/PhysRevD.84.112007DOIUNSPECIFIED
http://link.aps.org/doi/10.1103/PhysRevD.84.112007PublisherUNSPECIFIED
Additional Information:© 2011 American Physical Society. Received 29 July 2011; published 16 December 2011. We are grateful for the extraordinary contributions of our PEP-II colleagues in achieving the excellent luminosity and machine conditions that have made this work possible. The success of this project also relies critically on the expertise and dedication of the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and the kind hospitality extended to them. This work is supported by the US Department of Energy and National Science Foundation, the Natural Sciences and Engineering Research Council (Canada), the Commissariat à l’Energie Atomique and Institut National de Physique Nucléaire et de Physique des Particules (France), the Bundesministerium für Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica Nucleare (Italy), the Foundation for Fundamental Research on Matter (The Netherlands), the Research Council of Norway, the Ministry of Education and Science of the Russian Federation, Ministerio de Ciencia e Innovación (Spain), and the Science and Technology Facilities Council (United Kingdom). Individuals have received support from the Marie-Curie IEF program (European Union), the A.P. Sloan Foundation (USA) and the Binational Science Foundation (USA-Israel).
Funders:
Funding AgencyGrant Number
SLACUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Natural Sciences and Engineering Research Council (Canada)UNSPECIFIED
Commissariat à l’Energie Atomique (CEA) (France)UNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules (France)UNSPECIFIED
Bundesministerium für Bildung und Forschung (Germany)UNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (Italy)UNSPECIFIED
Foundation for Fundamental Research on Matter (The Netherlands)UNSPECIFIED
Research Council of NorwayUNSPECIFIED
Ministry of Education and Science of the Russian FederationUNSPECIFIED
Ministerio de Ciencia e Innovación (Spain)UNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Marie-Curie IEF program (European Union)UNSPECIFIED
A.P. Sloan FoundationUNSPECIFIED
Binational Science Foundation (USA-Israel)UNSPECIFIED
Issue or Number:11
Classification Code:PACS: 13.25.Hw, 11.30.Er, 12.15.Hh
Record Number:CaltechAUTHORS:20120202-093823043
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120202-093823043
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:29088
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:02 Feb 2012 21:05
Last Modified:03 Oct 2019 03:38

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