Study of the D0 ---> pi- pi+ pi- pi+ decay Page: 3 of 38
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Abstract
Using data from the FOCUS (E831) experiment at Fermilab, we present new measurements
for the Cabibbo-suppressed decay mode D0 - r-cr+r-r+. We measure the branching ratio
F(D0 - ir+ir-r+r-)/(D0 - K-r+r-r+) = 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 D0 - ai(1260)+r-, accounting for 60% of the
decay rate. The second most dominant contribution comes from the decay D0 - p(770)0p(770)0,
with a fraction of 25%. We also study the al(1260) line shape and resonant substructure. Using
the helicity formalism for the angular distribution of the decay D0 - p(770)0p(770)0, we measure
a longitudinal polarization of PL = (71 + 4 + 2)%.
PACS numbers: 13.25Ft,13.30Eg,13.87Fh3
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Link, J. M.; Yager, P. M.; /UC, Davis; Anjos, J. C.; Bediaga, I.; Castromonte, C. et al. Study of the D0 ---> pi- pi+ pi- pi+ decay, article, January 1, 2007; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc889901/m1/3/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.