Probing general U(1)′ models with non-universal lepton charges at FASER/FASER2, COHERENT and long-baseline oscillation experiments
Probing general U(1)′ models with non-universal lepton charges at FASER/FASER2, COHERENT and long-baseline oscillation experiments
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DOI：
10.1007/jhep09(2023)168
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发表时间：
2023-06
影响因子：
5.4
通讯作者：
T. Felkl;Tong Li;J. Liao;M. Schmidt
中科院分区：
文献类型：
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作者：
T. Felkl;Tong Li;J. Liao;M. Schmidt
一般的无反常U(1)模型允许非普适的轻子电荷。我们讨论了FASER/FASER_2、相干和沙丘/T_2HK精密实验对新规范玻色子Z‘和新的CP-EVEN标量ϕ的敏感性。在非普适轻子电荷的情况下，对于不同的U(1)电荷结构，在低和小规范耦合gBL区出现了不同的Faser/FASER2能级。相干实验和未来的长基线实验DUNE/T2HK也为可用参数空间提供了补充。对于mϕ<；2，在FASER/FASER 2处寻找标量ϕ对标量单态和SM Higgs的混合角很敏感。在mϕ>；2的情况下，运动学上允许的衰变ϕ→Z‘Z’改变标量ϕ的寿命和衰减率。灵敏度很大程度上依赖于Z‘质量和规范耦合g-Bl。
The general anomaly-free U (1)′ models allow non-universal lepton charges. We explore the sensitivities of FASER/FASER2, COHERENT and DUNE/T2HK precision experiments to the new gauge boson Z′ and the new CP-even scalar ϕ. With non-universal lepton charges, distinctive reaches at FASER/FASER2 emerge in the regime of lowand small gauge coupling g BL for different U (1)′ charge setups. The COHERENT experiment and the future long-baseline experiments DUNE/T2HK also provide complementary probes to the available parameter space. For m ϕ< 2, the search for the scalar ϕ at FASER/FASER2 is sensitive to the mixing angle between the scalar singlet and the SM Higgs. In the case of m ϕ> 2, the kinematically allowed decay ϕ→ Z′ Z′ changes the lifetime and decay rates of the scalar ϕ. The sensitivity reach highly depends on the Z′ mass and the gauge coupling g BL.