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Study of the D0 ---> pi- pi+ pi- pi+ decay [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2007.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
38 pages : digital, PDF file
Additional Creators
Fermi National Accelerator Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Using data from the FOCUS (E831) experiment at Fermilab, they present new measurements for the Cabbibo-suppressed decay mode D° → π⁻π⁺π⁻π⁺. They measure the branching ratio Λ(D° → π⁺π⁻π⁺π⁻)/Λ(D° → K⁻ π⁺π⁻π⁺) = 0.0914 ± 0.0018 ± 0.0022. An amplitude analysis has been performed, a first for this channel, in order to determine the resonant substructure of this decay mode. The dominant component is the decay D° → a₁(1260)⁺π⁻, accounting for 60% of the decay rate. The second most dominant contribution comes from the decay D° → ρ(770)°ρ(770)°, with a fraction of 25%. They also study the a₁(1260) line shape and resonant substructure. Using the helicity formalism for the angular distribution of the decay D° → ρ(770)°ρ(770)°, they measure a longitudinal polarization of P{sub L} = (71 ± 4 ± 2)%.
Report Numbers
E 1.99:fermilab-pub-06-491-e
fermilab-pub-06-491-e
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Note
Published through SciTech Connect.
01/01/2007.
"fermilab-pub-06-491-e"
"arXiv eprint number hep-ex/0701001"
Phys.Rev.D75:052003,2007 75 ISSN 1550-7998 FT
Link, J.M.; Anjos, J.C.; Bediaga, I.; Castromonte, C.; Machado, A.A.; Magnin, J.; Massafferri, A.; de Miranda, J.M.; Pepe, I.M.; Polycarpo, E.; Yager, P.M.
Funding Information
AC02-07CH11359
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