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

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

doi:10.1103/PhysRevLett.89.121801

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

Phys Rev Lett. 2002 Sep 16;89(12):121801. doi: 10.1103/PhysRevLett.89.121801. Epub 2002 Aug 28.

Authors

E M Aitala¹, S Amato, J C Anjos, J A Appel, D Ashery, S Banerjee, I Bediaga, G Blaylock, S B Bracker, P R Burchat, R A Burnstein, T Carter, H S Carvalho, N K Copty, L M Cremaldi, C Darling, K Denisenko, S Devmal, A Fernandez, G F Fox, P Gagnon, C Göbel, K Gounder, A M Halling, G Herrera, G Hurvits, C James, P A Kasper, S Kwan, D C Langs, J Leslie, B Lundberg, J Magnin, A Massafferri, S MayTal-Beck, B Meadows, J R T de Mello Neto, D Mihalcea, R H Milburn, J M de Miranda, A Napier, A Nguyen, A B d'Oliveira, K O'Shaughnessy, K C Peng, L P Perera, M V Purohit, B Quinn, S Radeztsky, A Rafatian, N W Reay, J J Reidy, A C dos Reis, H A Rubin, D A Sanders, A K S Santha, A F S Santoro, A J Schwartz, M Sheaff, R A Sidwell, A J Slaughter, M D Sokoloff, C J Solano Salinas, N R Stanton, R J Stefanski, K Stenson, D J Summers, S Takach, K Thorne, A K Tripathi, S Watanabe, R Weiss-Babai, J Wiener, N Witchey, E Wolin, S M Yang, D Yi, S Yoshida, R Zaliznyak, C Zhang

Affiliation

¹ University of Mississippi-Oxford, University, Mississippi 38677, USA.

PMID: 12225077
DOI: 10.1103/PhysRevLett.89.121801

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 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.