| Other Author |
Okamoto, M.; Aubin, C.; Bernard, C.; Di Pierro, M.; El-Khadra, A. X.; Gottlieb, Steven; Gregory, E. B., Heller, U. M., Hetrick, J.; Kronfeld, A. S.; Mackenzie, P. B.; Menscher, D. P.; Nobes, M.; Oktay, M. B.; Osborn, J.; Simone, J. N.; Sugar, R.; Toussaint, D., Trottier, H. D. |
| Description |
We present results for form factors of semileptonic decays of D and B mesons in 2+1 flavor lattice QCD using the MILC gauge configurations. With an improved staggered action for light quarks, we successfully reduce the systematic error from the chiral extrapolation. The results for D decays are in agreement with experimental ones. The results for B decays are preliminary. Combining our results with experimental branching ratios, we then obtain the CKM matrix elements |Vcd|, |Vcs|, |Vcb| and |Vub|. We also check CKM unitarity, for the first time, using only lattice QCD as the theoretical input. |
| Bibliographic Citation |
Okamoto, M., Aubin, C., Bernard, C., DeTar, C., Di Pierro, M., El-Khadra, A. X., Gottlieb, S., Gregory, E. B., Heller, U. M., Hetrick, J., Kronfeld, A. S., Mackenzie, P. B., Menscher, D. P., Nobes, M., Oktay, M. B., Osborn, J., Simone, J. N., Sugar, R., Toussaint, D., & Trottier, H. D. (2005). Semileptonic D → π/K and B → π/D decays in 2+1 flavor lattice QCD. Nuclear Physics B, 140, 1-3. |
