Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-05-30
Phys.Lett.B702:49-54,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 1 figure
Scientific paper
10.1016/j.physletb.2011.06.060
The pseudoscalar quarkonia exclusive decays to light mesons still poses a challenge to the theoretical understanding of quarkonium properties in decay. In this work, we evaluate the processes of pseudoscalar heavy quarkonium decays into vector meson pairs, especially the helicity suppressed processes of $\eta_b\rightarrow J/\psi J/\psi$ and $\eta_c\rightarrow VV$. In the frame of NRQCD, the branching fraction of $Br[\eta_b\rightarrow J/\psi J/\psi]$ are evaluated at the next-to-leading order of perturbative QCD; and within the light-cone distribution formalism, we calculate also the higher twist effects in these processes. Numerical results show that the higher twist terms contribute more than what from the NLO QCD corrections in the process of $\eta_b\rightarrow J/\psi J/\psi$. It is found that the experimental results on $\eta_c\rightarrow VV$ are hard to be understood by merely the quark model and perturbative QCD calculation.
Hao Gang
Qiao Cong-Feng
Sun Peng
No associations
LandOfFree
Pseudoscalar Quarkonium Exclusive Decays to Vector Meson Pair does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Pseudoscalar Quarkonium Exclusive Decays to Vector Meson Pair, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pseudoscalar Quarkonium Exclusive Decays to Vector Meson Pair will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-162050