Scholarlink

<p>We explain the ATOMKI anomaly with a very light <i>Z</i>′ state that features non-anomalous and non-flavour-universal vector and axial-vector couplings to all leptons. This <i>Z</i>′ comes from a theoretical framework with a spontaneously broken U(1)′ symmetry in addition to the Standard Model gauge group and is compliant with current measurements of the anomalous magnetic moments of the electron and the muon as well as beam dump experiments. The lepton flavour structure of this model allows for <i>Z</i>′ couplings to all light neutrinos, suggesting the possibility of <i>Z</i>′-mediated Non-Standard Interactions (NSIs) of neutrinos in matter, so that measurements of the strength parameters of the NSIs can constrain the value of the couplings. We use experimental constraints on NSIs of neutrinos using older TEXONO data and newer IceCube data. The IceCube data, in particular, strongly constrain the flavour universality of the leptonic vector current. The constraints enable us to define the region of parameter space of this theoretical scenario that can be pursued in further phenomenological analyses.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Constraints on the X17 boson from IceCube searches for non-standard interactions of neutrinos

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年6月18日

查看全文
  • Rikard Enberg,
  • Yaşar Hiçyılmaz,
  • Stefano Moretti,
  • Carlos Pérez de los Heros,
  • Harri Waltari

摘要

We explain the ATOMKI anomaly with a very light Z′ state that features non-anomalous and non-flavour-universal vector and axial-vector couplings to all leptons. This Z′ comes from a theoretical framework with a spontaneously broken U(1)′ symmetry in addition to the Standard Model gauge group and is compliant with current measurements of the anomalous magnetic moments of the electron and the muon as well as beam dump experiments. The lepton flavour structure of this model allows for Z′ couplings to all light neutrinos, suggesting the possibility of Z′-mediated Non-Standard Interactions (NSIs) of neutrinos in matter, so that measurements of the strength parameters of the NSIs can constrain the value of the couplings. We use experimental constraints on NSIs of neutrinos using older TEXONO data and newer IceCube data. The IceCube data, in particular, strongly constrain the flavour universality of the leptonic vector current. The constraints enable us to define the region of parameter space of this theoretical scenario that can be pursued in further phenomenological analyses.