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In this article, we calculate the nonfactorizable soft contributions in the$B \to \eta_c K, \chi_{c0} K$ decays with the light cone QCD sum rulesapproach. Our results show that the nonfactorizable corrections from the softgluon exchanges in the decay $B \to \eta_c K$ are of $(15-30)%$ and should notbe neglected. As for the decay $B \to \chi_{c0} K$, the factorizablecontributions are zero and the nonfactorizable contributions from the softhadronic matrix elements are too small to accommodate the experimental data.Comment: 16 pages; Revised versio

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

Nonfactorizable soft contributions in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:msub><mml:mi>η</mml:mi><mml:mi>c</mml:mi></mml:msub><mml:mi>K</mml:mi><mml:mo>,</mml:mo><mml:msub><mml:mi>x</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mn>0</mml:mn></mml:mrow></mml:msub><mml:mi>K</mml:mi></mml:math>decays with the light-cone sum rule approach

Nonfactorizable soft contributions in theB→ηcK,xc0Kdecays with the light-cone sum rule approach