分类: 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间: 2017-11-10
摘要: We study the excited B mesons' contributions to the coupled-channel e ects under the framework of the 3P0 model for the bottomonium. Contrary to what has been widely accepted, the contributions of P wave B mesons are generally the largest, and to some extent, this result is independent of the potential parameters. We also push the calculation beyond B(1P) and carefully analyze the contributions of B(2S). A form factor is a key ingredient to suppress the contributions of B(2S) for low lying bottomonia. However, this suppression mechanism is not e cient for highly excited bottomonia, such as (5S) and (6S). We give explanations why this di culty happens to the 3P0 model and suggest analyzing the ux-tube breaking model for the full calculation of coupled-channel e ects.