Abstract
We investigate the exclusive nonleptonic decays Brightarrow chi _{c1}K(pi ) in the conventional perturbative QCD (PQCD) formalism. The predictions of branching ratios and CP asymmetries are given in detail. We compare our results with available experimental data as well as predictions of other theoretical studies existing in the literature. It seems that the branching ratios of Brightarrow chi _{c1} K are more consistent with data than the earlier analyses. For the Cabibbo-suppressed B_s decays, the branching ratios can reach the order of 10^{-5}, which would be straight forward for experimental observations. The numerical results show that the direct CP asymmetries of the concerned decays are rather small. The mixing-induced CP asymmetry in the B^0rightarrow chi _{c1}K_S is very close to sin {2beta }, which suggests that this channel offer an alternative method for measuring the Cabbibo–Kobayashi–Maskawa (CKM) angle beta . The obtained results in the present work could be tested by further experiments in the LHCb and forthcoming Belle II.
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