对μ介子g-2的NLO强子真空极化贡献进行晶格测定的时间内核

IF 4.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Physics Letters B Pub Date : 2024-10-01 DOI:10.1016/j.physletb.2024.139040

Elisa Balzani , Stefano Laporta , Massimo Passera

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引用次数: 0

摘要

我们研究了在次领先阶计算类空间区域μ介子g-2的强子真空极化贡献所需的核的时间-动量表示。对于小的时间值，我们提出了解析级数展开；对于大的时间值，我们提出了数值级数展开，克服了天真的渐近展开所显示的问题。这些结果将用于格子 QCD 在次领先阶确定强子真空极化对μ介子 g-2 的贡献。

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Time-kernel for lattice determinations of NLO hadronic vacuum polarization contributions to the muon g-2

We study the time-momentum representation of the kernel needed to compute the hadronic vacuum polarization contribution to the muon g-2 in the space-like region at next-to-leading order. For small values of the time, we present analytical series expansions; for large values of the time, we present numerical series expansions which overcome the problems showed by naïve asymptotic expansions. These results are to be employed in lattice QCD determination of the hadronic vacuum polarization contribution to the muon g-2 at next-to-leading order.

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来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.