B 物理中的精密计算

arXiv - PHYS - High Energy Physics - Phenomenology Pub Date : 2024-09-11 DOI:arxiv-2409.07572

Matthias Steinhauser

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引用次数: 0

摘要

我们讨论了最近对 $B$ 介子性质的高阶计算。这包括对非轻子和半轻子$B$介子分解的次邻导阶修正和次邻导阶修正。后者对于确定 CKM 矩阵元素 $V_{cb}$ 非常重要。我们还讨论了中性$B$介子系统中宽度差的次到邻域阶修正。

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Precision Calculations in B physics

We discuss recent higher order calculations to properties of $B$ mesons. This includes next-to-next-to-leading order corrections to nonleptonic and next-to-next-to-next-to-leading order corrections to semileptonic $B$ meson decays. The latter is important in connection to the determination of the CKM matrix element $V_{cb}$. We also discuss next-to-next-to-leading order corrections to the width difference in the neutral $B$ meson system.

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arXiv - PHYS - High Energy Physics - Phenomenology

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