| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2008: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
|---|
| Research Abstract |
We studied the I=2ππscattering length by lattice QCD using the overlap fermion formulation. After correcting finite volume effects, obtained results are consistent with the prediction of the next-to-next-to-leading order(NNLO) chiral perturbation theory. The scattering length extrapolated to the physical pion mass coincides with the experimental value. We also obtained a low-energy constant of the NNLO chiral perturbation expansion. We also studied D_1 anti-D, D anti-D0 & , J/ψa_1,χ_<c1>ρscattering lengths by lattice QCD using Wilson fermion formulation in order to obtain a hint about the structure of Z(4430) which was found by Belle collaboration at KEK. We found attraction in all channels. Using the Luscher's formula we tentatively conclude that attraction form bound states in D_1 anti-D, D anti-D0 channels but not in J/ψa_1,χ_<c1>ρchannels.
|
