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    • First Constraints on General Neutrino Interactions Based on KATRIN Data

    arXiv · （2024）

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    Abstract
    The precision measurement of the tritium β-decay spectrum performed by the KATRIN experiment provides a unique way to search for general neutrino interactions (GNI). All theoretical allowed GNI terms involving neutrinos are incorporated into a low-energy effective field theory, and can be identified by specific signatures in the measured tritium β-spectrum. In this paper an effective description of the impact of GNI on the β-spectrum is formulated and the first constraints on the effective GNI parameters are derived based on the 4 million electrons collected in the second measurement campaign of KATRIN in 2019. In addition, constraints on selected types of interactions are investigated, thereby exploring the potential of KATRIN to search for more specific new physics cases, including a right-handed W boson, a charged Higgs or leptoquarks.
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    【要点】：本研究利用KATRIN实验精确测量氚β衰变谱，首次对广义中微子相互作用（GNI）进行了限制，并探讨了KATRIN在寻找特定新物理案例中的潜力。
    

    【方法】：通过将所有理论允许的GNI项纳入低能有效场理论，并通过氚β谱中的特定信号进行识别。
    

    【实验】：KATRIN在2019年的第二次测量活动中收集了400万电子数据，基于这些数据首次对GNI有效参数进行了限制。
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