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1. chinaXiv:201609.00811 [pdf]

Inclusive and exclusive measurements of $B$ decays to $\chi_c1$ and $\chi_c2$ at Belle

Bhardwaj, V. and others
Subjects: Physics >> Nuclear Physics

We report inclusive and exclusive measurements for?χc1?and?χc2?production in?B?decays. We measure?B(B→χc1X)=?(3.03±0.05(stat)±0.24(syst))×10?3?and?B(B→χc2X)=?(0.70±0.06(stat)±0.10(syst))×10?3. For the first time,?χc2?production in exclusive?B?decays in the modes?B0→χc2π?K+?and?B+→χc2π+π?K+?has been observed, along with first evidence for the?B+→χc2π+K0S?decay mode. For?χc1?production, we report the first observation in the?B+→χc1π+π?K+,?B0→χc1π+π?K0S?and?B0→χc1π0π?K+?decay modes. Using these decay modes, we observe a difference in the production mechanism of?χc2?in comparison to?χc1?in?B?decays. In addition, we report searches for?X(3872)?and?χc1(2P)?in the?B+→(χc1π+π?)K+?decay mode. The reported results use?772×106?BB?????events collected at the?Υ(4S)?resonance with the Belle detector at the KEKB asymmetric-energy?e+e??collider.

submitted time 2016-09-12 Hits975Downloads556 Comment 0

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