Wednesday, April 4, 2012

1204.0215 (Long-Bin Chen et al.)

P-wave Quarkonium Decays to Meson Pair    [PDF]

Long-Bin Chen, Cong-Feng Qiao
The processes of P-wave Quarkonium exclusive decays to two mesons are investigated, in which the final state vector mesons with various polarizations are considered separately. In the calculation, the initial heavy quarkonia are treated in the framework of non-relativistic quantum chromodynamics, whereas for light mesons, the light cone distribution amplitudes up to twist-3 are employed. It turns out that the higher twist contribution is significant and provides a possible explanation for the observation of the hadron helicity selection rule violated processes $\chi_{c1}\rightarrow \phi\phi,\omega\omega$ by the BESIII collaboration in recently. We also evaluate the $\chi_{b1}\to J/\psi J/\psi$ process and find that its branching ratio is big enough to be measured at the B-factories.
View original: http://arxiv.org/abs/1204.0215

No comments:

Post a Comment