A B−anomaly motivated Z′ boson at the energy and precision frontiers

IF 4.5 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics Letters B Pub Date : 2025-10-11 DOI:10.1016/j.physletb.2025.139928

Ben Allanach , Christoph Englert , Wrishik Naskar

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引用次数: 0

Abstract

TeV-scale

Z^{'}

bosons with family-dependent couplings can explain some anomalies inferred from

B -

meson measurements of processes involving the

b \to s ℓ^{+} ℓ^{-}

transition. A

Z^{'}

originating from kinetically-mixed spontaneously broken

U {(1)}_{B_{3} - L_{2}}

gauge symmetry has been shown to greatly ameliorate global fits [1] in a ‘flavour-preferred’ region of parameter space. We provide an exploration of this region at the high luminosity (HL-)LHC with particular attention to which signals could be verified across different discovery modes. Even if the HL-LHC does not discover the

Z^{'}

boson in a resonant di-lepton channel, a FCC-ee

Z

-pole run would detect oblique corrections to the electroweak precision observables (EWPOs). Changes due to

Z^{'}

-induced non-oblique corrections are unlikely to be detected, to within experimental precision. In any case, the extended discovery potential offered by a 100 TeV

p p -

collider would afford sensitivity to the entire flavour-preferred region and enable a fine-grained and forensic analysis of the model.

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在能量和精度边界上，B−异常激发了Z’玻色子

具有族依赖耦合的tev尺度Z’玻色子可以解释从涉及B→s的过程的B -介子测量中推断出的一些异常。由动力学混合自发破断U(1)B3−L2规范对称产生的Z '已被证明可以极大地改善参数空间“风味偏好”区域的全局拟合[1]。我们在高亮度（HL-）大型强子对撞机上对该区域进行了探索，特别注意哪些信号可以在不同的发现模式下得到验证。即使HL-LHC没有在共振双轻子通道中发现Z’玻色子，FCC-ee的Z极运行也会检测到对电弱精度观测（EWPOs）的倾斜修正。由于Z '诱导的非斜校正引起的变化不太可能被检测到，在实验精度范围内。在任何情况下，100 TeV pp -对撞机提供的扩展发现潜力将提供对整个风味偏好区域的敏感性，并使模型的细粒度和法医分析成为可能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.