Measurements of six-body hadronic decays of the D0 charmed meson

• Published in: Physics letters. B Vol. 586; no. 1-2; pp. 21 - 26
• Main Authors: Link, J.M, Yager, P.M, Anjos, J.C, Bediaga, I, Göbel, 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, Cinquini, L, Cumalat, J.P, O'Reilly, B, Segoni, I, Butler, J.N, Cheung, H.W.K, Gaines, I, Garbincius, P.H, Garren, L.A, Gottschalk, E, Kasper, P.H, Kreymer, A.E, Kutschke, R, Wang, M, Benussi, L, Bertani, M, Bianco, S, Zallo, A, Reyes, M, Cawlfield, C, Kim, D.Y, Rahimi, A, Wiss, J, Gardner, R, Chung, Y.S, Kang, J.S, Ko, B.R, Lee, K.B, Cho, K, Park, H, Alimonti, G, Barberis, S, Boschini, M, D'Angelo, P, DiCorato, M, Dini, P, Edera, L, Erba, S, Giammarchi, M, Inzani, P, Leveraro, F, Malvezzi, S, Menasce, D, Mezzadri, M, Moroni, L, Pedrini, D, Pontoglio, C, Prelz, F, Rovere, M, Sala, S, Davenport, T.F, Arena, V, Boca, G, Bonomi, G, Gianini, G, Liguori, G, Merlo, M.M, Pantea, D, Lopes Pegna, D, Ratti, S.P, Riccardi, C, Vitulo, P, Hernandez, H, Lopez, A.M, Luiggi, E, Mendez, H, Paris, A, Zhang, Y, Wilson, J.R, Handler, T, Mitchell, R, Bryant, A.D, Engh, D, Hosack, M, Johns, W.E, Nehring, M, Sheldon, P.D, Stenson, K, Vaandering, E.W, Webster, M, Sheaff, M
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 22-04-2004; Elsevier Science
• Subjects: Exact sciences and technology; Physics; The physics of elementary particles and fields; Branching ratio; D mesons; Meson hadronic decay; Charmed mesons
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2004.02.038

Using data collected by the FOCUS experiment at Fermilab, we report the discovery of the decay modes D0→K−π+π+π+π−π− and D0→π+π+π+π−π−π−. With a sample of 48±10 reconstructed D0→K−π+π+π+π−π− decays and 149±17 reconstructed D0→π+π+π+π−π−π− decays, we measure the following relative branching ratios: Γ(D0→K−π+π+π+π−π−)/Γ(D0→K−π+π+π−)=(2.70±0.58±0.38)×10−3,Γ(D0→π+π+π+π−π−π−)/Γ(D0→K−π+π+π−)=(5.23±0.59±1.35)×10−3,Γ(D0→π+π+π+π−π−π−)/Γ(D0→K−π+π+π+π−π−)=1.93±0.47±0.48. The first errors are statistical and the second are systematic. The branching fraction of the Cabibbo suppressed six-body decay mode is measured to be a factor of two higher than the branching fraction of the Cabibbo favored six-body decay mode.