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Article: Dalitz plot analysis of the decay D(+)-->K(-)pi(+)pi(+) and indication of a low-mass scalar Kpi resonance.

Aitala, E M / Amato, S / Anjos, J C / Appel, J A / Ashery, D / Banerjee, S / Bediaga, I / Blaylock, G / Bracker, S B / Burchat, P R / Burnstein, R A / Carter, T / Carvalho, H S / Copty, N K / Cremaldi, L M / Darling, C / Denisenko, K / Devmal, S / Fernandez, A /
Fox, G F / Gagnon, P / Göbel, C / Gounder, K / Halling, A M / Herrera, G / Hurvits, G / James, C / Kasper, P A / Kwan, S / Langs, D C / Leslie, J / Lundberg, B / Magnin, J / Massafferri, A / MayTal-Beck, S / Meadows, B / de Mello Neto, J R T / Mihalcea, D / Milburn, R H / de Miranda, J M / Napier, A / Nguyen, A / d'Oliveira, A B / O'Shaughnessy, K / Peng, K C / Perera, L P / Purohit, M V / Quinn, B / Radeztsky, S / Rafatian, A / Reay, N W / Reidy, J J / dos Reis, A C / Rubin, H A / Sanders, D A / Santha, A K S / Santoro, A F S / Schwartz, A J / Sheaff, M / Sidwell, R A / Slaughter, A J / Sokoloff, M D / Solano Salinas, C J / Stanton, N R / Stefanski, R J / Stenson, K / Summers, D J / Takach, S / Thorne, K / Tripathi, A K / Watanabe, S / Weiss-Babai, R / Wiener, J / Witchey, N / Wolin, E / Yang, S M / Yi, D / Yoshida, S / Zaliznyak, R / Zhang, C

Physical review letters

2002  Volume 89, Issue 12, Page(s) 121801

Abstract: We study the Dalitz plot of the decay D(+)-->K(-)pi(+)pi(+) with a sample of 15090 events from Fermilab experiment E791. Modeling the decay amplitude as the coherent sum of known Kpi resonances and a uniform nonresonant term, we do not obtain an ... ...

Abstract We study the Dalitz plot of the decay D(+)-->K(-)pi(+)pi(+) with a sample of 15090 events from Fermilab experiment E791. Modeling the decay amplitude as the coherent sum of known Kpi resonances and a uniform nonresonant term, we do not obtain an acceptable fit. If we allow the mass and width of the K(*)(0)(1430) to float, we obtain values consistent with those from PDG but the chi(2) per degree of freedom of the fit is still unsatisfactory. A good fit is found when we allow for the presence of an additional scalar resonance, with mass 797+/-19+/-43 MeV/c(2) and width 410+/-43+/-87 MeV/c(2). The mass and width of the K(*)(0)(1430) become 1459+/-7+/-5 MeV/c(2) and 175+/-12+/-12 MeV/c(2), respectively. Our results provide new information on the scalar sector in hadron spectroscopy.
Language English
Publishing date 2002-09-16
Publishing country United States
Document type Journal Article
ZDB-ID 208853-8
ISSN 1079-7114 ; 0031-9007
ISSN (online) 1079-7114
ISSN 0031-9007
DOI 10.1103/PhysRevLett.89.121801
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