Review summarizes experimental evidence for the X 17 particle, highlighting theoretical implications for physics.
This review summarizes the experimental evidence for the hypothetical X 17 particle [1, 2], examines the theoretical frameworks in which it can be accommodated [3, 4], and discusses its potential implications for the Standard Model and couplings to known particles [5]. Future experimental prospects are also highlighted.
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Serao et al. (2026) studied this question.
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