Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2012-03-02
Phys. Rev. D 85, 071102(R), 2012
Physics
High Energy Physics
High Energy Physics - Experiment
7 pages, 4 figures, 1 table
Scientific paper
10.1103/PhysRevD.85.071102
Using a sample of 158 million $\Upsilon(2S)$ events collected with the Belle detector, we search for the first time for double charmonium decays of the $P$-wave spin-triplet bottomonium states ($\Upsilon(2S) \to \gamma \chi_{bJ}$, $\chi_{bJ} \to \jpsi \jpsi$, $\jpsi \psp$, $\psp \psp$ for J=0, 1, and 2). No significant $\chi_{bJ}$ signal is observed in the double charmonium mass spectra, and we obtain the following upper limits, $\BR(\chi_{bJ} \to \jpsi \jpsi)<7.1\times 10^{-5}$, $2.7\times 10^{-5}$, $4.5\times 10^{-5}$, $\BR(\chi_{bJ} \to \jpsi \psp)<1.2\times 10^{-4}$, $1.7\times 10^{-5}$, $4.9\times 10^{-5}$, $\BR(\chi_{bJ} \to \psp \psp)<3.1\times 10^{-5}$, $6.2\times 10^{-5}$, $1.6\times 10^{-5}$ for J=0, 1, and 2, respectively, at the 90% confidence level. These limits are significantly lower than the central values (with uncertainties of 50% to 70%) predicted using the light cone formalism but are consistent with calculations using the NRQCD factorization approach.
No associations
LandOfFree
Search for double charmonium decays of the P-wave spin-triplet bottomonium states 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 Search for double charmonium decays of the P-wave spin-triplet bottomonium states, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Search for double charmonium decays of the P-wave spin-triplet bottomonium states will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-165874