Study of the D0→π-π+π-π+ decay

Authors

J. M. Link, University of California, DavisFollow
P. M. Yager, University of California, DavisFollow
J. C. Anjos, Centro Brasileiro de Pesquisas FísicasFollow
I. Bediaga, Centro Brasileiro de Pesquisas FísicasFollow
C. Castromonte, Centro Brasileiro de Pesquisas Físicas
A. A. Machado, Centro Brasileiro de Pesquisas FísicasFollow
J. Magnin, Centro Brasileiro de Pesquisas FísicasFollow
A. Massafferri, Centro Brasileiro de Pesquisas FísicasFollow
Abaz Kryemadhi, Messiah UniversityFollow
I. M. Ahsan, Kansas State UniversityFollow

Document Type

Article

Publication Date

3-27-2007

Abstract

Using data from the FOCUS (E831) experiment at Fermilab, we present new measurements for the Cabibbo-suppressed decay mode D0→π-π+π-π+. We measure the branching ratio Γ(D0→π+π-π+π-)/ Γ(D0→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 D0→a1(1260)+π-, accounting for 60% of the decay rate. The second most dominant contribution comes from the decay D0→ρ(770) 0ρ(770)0, with a fraction of 25%. We also study the a1(1260) line shape and resonant substructure. Using the helicity formalism for the angular distribution of the decay D0→ρ(770)0ρ(770)0, we measure a longitudinal polarization of PL=(71±4±2)%. © 2007 The American Physical Society.

Recommended Citation

Link, J. M.; Yager, P. M.; Anjos, J. C.; Bediaga, I.; Castromonte, C.; Machado, A. A.; Magnin, J.; Massafferri, A.; Kryemadhi, Abaz; and Ahsan, I. M., "Study of the D0→π-π+π-π+ decay" (2007). Educator Scholarship & Departmental Newsletters. 154.
https://mosaic.messiah.edu/mps_ed/154