Study of Penguin Pollution in the B^0 -> J/psi K_S Decay

Details Study of Penguin Pollution in the B^0 -> J/psi K_S Decay Study of Penguin Pollution in the B^0 -> J/psi K_S Decay

2007-03-18

arxiv.org/abs/hep-ph/0703193v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 5 figures; talk given at the 4th International Workshop on the CKM Unitarity Triangle (CKM2006), Nagoya, Japan, Dec.

Scientific paper

We study the penguin pollution in the B^0 -> J/psi K_S decay up to leading power in 1/m_b and to next-to-leading order in \alpha_s, m_b being the b quark mass and \alpha_s the strong coupling constant. The deviation \Delta S_{J/psi K_S} of the mixing-induced CP asymmetry from sin(2\phi_1) and the direct CP asymmetry A_{J/psi K_S} are both found to be of O(10^{-3}) in a formalism that combines the QCD-improved factorization and perturbative QCD approaches.

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