Phenomenological analysis of the quasi-two-body B → D (R→) K π decays in PQCD Approach

2023/11/29 by Fang, Wen-Sheng, Zou, Zhi-Tian, Li, Ying
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2311.17678

Abstract

The quasi-two-body B → D (R→) K π decays are calculated in PQCD approach based on the k_T factorization by introducing the wave functions of Kπ pair associated with the resonances K^*(892), K₀^*(1430) and K₂^*(1430). The results show that most branching fractions are at the order of 10^-7 or even smaller. However, for B⁰→ D⁰(K^*→)Kπ decays enhanced by the CKM element V_cs, their branching fractions are at the order of 10^-6, which are measurable in the current ongoing experiments. Based on the narrow-width-approximation we also extract the branching fractions of the corresponding two-body B → D K^* decays and the results are in good agreement with previous predictions. Because these decays are only governed by the tree operators, there are no CP asymmetries in these decays in the standard model.

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