First Results from BESIII

We present the most recent results from the BESIII experiment. This review covers the studies of charmonium decays, light hadron spectroscopy and charm physics. Especially, the prospects for weak decays of charm mesons are addressed at the BESIII.Comment: Presented at Flavor Physics and CP Violation - FPCP 2010, Turin, Italy, May 25-29, 201

N-(3-Meth­oxy­phen­yl)-4-{4-methyl-2-[(meth­yl)(4-methyl­phen­yl)amino]-1,3-thia­zol-5-yl}pyrimidin-2-amine

The asymmetric unit of the title compound, C23H23N5OS, contains two independent mol­ecules. In one mol­ecule, the thia­zole and pyrimidine rings are almost co-planar, making a dihedral angle of 2.48 (8)°. In the other mol­ecule, the corresponding dihedral angle is 12.82 (8)°. The crystal structure is stabilized by weak inter­molecular N—H⋯N and C—H⋯O inter­actions that extend along the b axis

D^0-D^0bar mixing in \Upsilon(1S) \to D^0 D^0bar decay at Super-B

\Dz-\Dzb mixing and significant CP violation in the charm system may indicate the signature of new physics. In this study, we suggest that the coherent \DzDzb events from the decay of \Upsilon(1S) \to \Dz \Dzb can be used to measure both mixing parameters and CP violation in charm decays. The neutral $D$ mesons from $\Upsilon(1S)$ decay are strongly boosted, so that it will offer the possibility to measure the proper-time interval, $\Delta t$, between the fully-reconstructed \Dz and \Dzb. Both coherent and time-dependent information can be used to extract \Dz-\Dzb mixing parameters. The sensitivity of the measurement should be improved at B factories or super-B.Comment: 6 pages, 1 figure, this is the last version to appear in Phys. Rev.