Study of the D0→π-π+π-π+ decay

J. M. Link, P. M. Yager, J. C. Anjos, I. Bediaga, C. Castromonte, A. A. Machado, J. Magnin, A. Massafferri, J. M. De Miranda, I. M. Pepe, E. Polycarpo, A. C. Dos Reis, S. Carrillo, E. Casimiro, E. Cuautle, A. Sánchez-Hernández, C. Uribe, F. Vázquez, L. Agostino, L. CinquiniJ. P. Cumalat, V. Frisullo, B. O'Reilly, I. Segoni, K. Stenson, J. N. Butler, H. W.K. Cheung, G. Chiodini, I. Gaines, P. H. Garbincius, L. A. Garren, E. Gottschalk, P. H. Kasper, A. E. Kreymer, R. Kutschke, M. Wang, L. Benussi, S. Bianco, F. L. Fabbri, A. Zallo, M. Reyes, C. Cawlfield, D. Y. Kim, A. Rahimi, J. Wiss, R. Gardner, A. Kryemadhi, Y. S. Chung, J. S. Kang, B. R. Ko, J. W. Kwak, K. B. Lee, K. Cho, H. Park, G. Alimonti, S. Barberis, M. Boschini, A. Cerutti, P. D'Angelo, M. DiCorato, P. Dini, L. Edera, S. Erba, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Moroni, D. Pedrini, C. Pontoglio, F. Prelz, M. Rovere, S. Sala, T. F. Davenport, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, D. Lopes Pegna, M. M. Merlo, D. Pantea, S. P. Ratti, C. Riccardi, P. Vitulo, C. Göbel, J. Otalora, H. Hernandez, A. M. Lopez, H. Mendez, A. Paris, J. Quinones, J. E. Ramirez, Y. Zhang, J. R. Wilson, T. Handler, R. Mitchell, D. Engh, M. Hosack, W. E. Johns, E. Luiggi, M. Nehring, P. D. Sheldon, E. W. Vaandering, M. Webster, M. Sheaff

Research output: Contribution to journalArticle

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)%.

Original languageEnglish (US)
Article number052003
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume75
Issue number5
DOIs
StatePublished - Mar 27 2007

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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  • Cite this

    Link, J. M., Yager, P. M., Anjos, J. C., Bediaga, I., Castromonte, C., Machado, A. A., Magnin, J., Massafferri, A., De Miranda, J. M., Pepe, I. M., Polycarpo, E., Dos Reis, A. C., Carrillo, S., Casimiro, E., Cuautle, E., Sánchez-Hernández, A., Uribe, C., Vázquez, F., Agostino, L., ... Sheaff, M. (2007). Study of the D0→π-π+π-π+ decay. Physical Review D - Particles, Fields, Gravitation and Cosmology, 75(5), [052003]. https://doi.org/10.1103/PhysRevD.75.052003