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The effects of initial $b$ quark bound state for the semi-inclusive decays$B\to K(K^*) X$ are studied using light cone expansion and heavy quarkeffective theory methods. We find that the initial bound state effects on thebranching ratios and CP asymmetries are small. In the light cone expansionapproach, the CP-averaged branching ratios are increased by about 2% withrespect to the free $b$-quark decay. For $\bar B^0 \to K^- (K^{*-}) X$, theCP-averaged branching ratios are sensitive to the phase $\gamma$ and the CPasymmetry can be as large as 7% (14%), whereas for $B^-\to \bar K^0 (\barK^{*0})X$ the CP-averaged branching ratios are not sensitive to $\gamma$ andthe CP asymmetries are small ($< 1%$). The CP-averaged branching ratios arepredicted to be in the ranges $(0.53 \sim 1.5)\times 10^{-4}$ [$(0.25 \sim2.0)\times 10^{-4}$] for $\bar B^0 \to K^- (K^{*-})X$ and $(0.77 \sim0.84)\times 10^{-4}$ [$(0.67 \sim 0.74)\times 10^{-4}$] for $B^-\to \bar K^0(\bar K^{*0}) X$, depending on the value of the CP violating phase $\gamma$. Inthe heavy quark effective theory approach, we find that the branching ratiosare decreased by about 10% and the CP asymmetries are not affected. Thesepredictions can be tested in the near future.Comment: 29 pages, 12 ps figure

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Semi-inclusive<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mo>→</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>K</mml:mi><mml:mo>(</mml:mo><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mi>*</mml:mi></mml:mrow></mml:msup></mml:mrow><mml:mo>)</mml:mo><mml:mi>X</mml:mi></mml:math>decays with initial bound state effects

Semi-inclusiveB→K(K*)Xdecays with initial bound state effects