从B(d)介子的退相干演化重新考察sin(2 β)和Δ m(d)
Re-examining sin(2beta) and Delta m(d) from evolution of B(d) mesons with decoherence
摘要:
在中性介子系统的时间演化中,通常假定系统具有理想的量子相干性。B(d)系统的重要量,如sin(2 β)和Delta m(d),都是在这个假设下确定的。然而,介子系统与其环境相互作用。这种相互作用甚至可以在介子衰变之前导致介子的退相干。在我们的形式主义,这种退相干是由一个单一的参数lambda建模。在退相干的介子系统中,需要重新研究确定sin(2 β)和Δ m(d)的方法。我们发现,这两个量的现值调制的λ。对来自B工厂和LHCb的B(d)数据进行重新分析可以清楚地确定lambda、sin(2 β)和Delta m(d)。
英文摘要:
In the time evolution of neutral meson systems, a perfect quantum coherence is usually assumed. The important quantities of the B(d) system, such as sin (2beta) and Delta m(d), are determined under this assumption. However, the meson system interacts with its environment. This interaction can lead to decoherence in the mesons even before they decay. In our formalism this decoherence is modelled by a single parameter lambda. It is desirable to re-examine the procedures of determination of sin(2beta) and Delta m(d) in meson systems with decoherence. We find that the present values of these two quantities are modulated by lambda. Re-analysis of B(d) data from B-factories and LHCb can lead to a clean determination of lambda, sin(2beta) and Delta m(d).
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。