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Observation and polarization measurement of B^0 → a_1(1260)^(+)a_1(1260)^(-) decay

Aubert, B. and Cheng, C. H. and Doll, D. A. and Echenard, B. and Fang, F. and Hitlin, D. G. and Narsky, I. and Ongmongkolkul, P. and Piatenko, T. and Porter, F. C. (2009) Observation and polarization measurement of B^0 → a_1(1260)^(+)a_1(1260)^(-) decay. Physical Review D, 80 (9). Art. No. 092007. ISSN 2470-0010.

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We present measurements of the branching fraction B and longitudinal polarization fraction f_L for B^0 → a_1(1260)^(+)a_1(1260)^(-) decays, with a_1(1260)^(±) → π^(-)π^(+)π^(±). The data sample, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represents 465 × 10^6 produced BB(overbar) pairs. We measure B(B^0 → a_1(1260)^(+)a_1(1260)^-) × [B(a_1(1260)^+ → π^(-)π^(+)π^(+))]^2 = (11.8±2.6±1.6) ×10^(-6) and f_L = 0.31±0.22±0.10, where the first uncertainty is statistical and the second systematic. The decay mode is measured with a significance of 5.0 standard deviations including systematic uncertainties.

Item Type:Article
Related URLs:
URLURL TypeDescription
Cheng, C. H.0000-0002-8382-0447
Hitlin, D. G.0000-0003-4028-6982
Porter, F. C.0000-0003-1948-8889
Additional Information:© 2009 American Physical Society. Received 13 July 2009; published 20 November 2009. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues, and for the substantial dedicated effort from the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (USA), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MEC (Spain), and STFC (United Kingdom). Individuals have received support from the Marie Curie EIF (European Union) and the A. P. Sloan Foundation.
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Commissariat à l’Energie Atomique (CEA)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Bundesministerium für Bildung und Forschung (BMBF)UNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Stichting voor Fundamenteel Onderzoek der Materie (FOM)UNSPECIFIED
Research Council of NorwayUNSPECIFIED
Ministry of Education and Science of the Russian FederationUNSPECIFIED
Ministerio de Educación y Ciencia (MEC)UNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Marie Curie FellowshipUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)UNSPECIFIED
Issue or Number:9
Classification Code:PACS: 13.25.Hw, 11.30.Er, 12.15.Hh
Record Number:CaltechAUTHORS:20100707-153846261
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:18937
Deposited By: Jason Perez
Deposited On:09 Jul 2010 15:27
Last Modified:09 Mar 2020 13:18

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