The evasion of helicity selection rule in $χ_{c1}\to VV$ and $χ_{c2}\to VP$ via intermediate charmed meson loops

Details The evasion of helicity selection rule in $χ_{c1}\to VV$ and $χ_{c2}\to VP$ via intermediate charmed meson loops The evasion of helicity selection rule in $χ_{c1}\to VV$ and $χ_{c2}\to VP$ via intermediate charmed meson loops

2009-12-08

arxiv.org/abs/0912.1508v3

Phys.Rev.D81:014017,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 5 figures; minor changes: modified introduction, references added

Scientific paper

10.1103/PhysRevD.81.014017

The hadronic decays of $\chi_{c1}\to VV$ and $\chi_{c2}\to VP$ are supposed to be suppressed by the helicity selection rule in the pQCD framework. With an effective Lagrangian method, we show that the intermediate charmed meson loops can provide a mechanism for the evasion of the helicity selection rule, and result in sizeable decay branching ratios in some of those channels. The theoretical predictions can be examined by the forthcoming BES-III data in the near future.

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