Light scalar mesons in 2+1 flavor full QCD
  We study the a_0 and K_0^* light scalar mesons in 2+1 flavor full QCD. Particular attention is paid to fitting excited states, with an eye toward determining whether scattering states are revealed. An ultimate goal will be to see how dynamical quarks affect the picture outlined with an earlier quenched study using overlap fermions, namely, that it is the a_0(1450), not the a_0(980), which is the lowest $\bar{q}q$ isovector scalar state. 
Terrence Draper, Takumi Doi, Keh-Fei Liu, Devdatta Mankame, Nilmani   Mathur, Xiangfei Meng