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arXiv 2103.06783hep-ph
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具有最少外部变量的族非泛U(1)$^\prime$模型

Family Non-Universal U(1)$^\prime$ Model with Minimal Number of Exotics

Yaşar Hiçyılmaz, Stefano Moretti, Levent Solmaz

摘要:

本文研究了U(1)$^\prime$ -扩展最小超对称标准模型(UMSSM)中几个非普适U(1)$^\prime$子模型的唯象意义.在这样做的时候,我们已经开始强制执行异常取消标准,以产生一些解决方案,其中额外的U(1)$^\prime$电荷的粒子被视为自由参数。然后,我们施加现有的边界来自对撞机和天体物理观测的假设的子模型,并观察到,目前的限制决定某些电荷的取向,例如,$Q_{H_u}\sim Q_{H_d}$是首选的一般和单重$Q_S$的电荷不能很小($|Q_S|>$ 0.4),即使任何的费用被允许采取任何值在$[-1, 1]$范围内。最后,我们研究了这种非普遍电荷对$Z'$介导的过程的潜在影响,并对现有和未来的实验进行了预测。事实证明,如果在这种模型的轻子部分实现了非普适荷,那么无论是否存在轻奇异夸克,UMSSM都可以产生可验证的签名。

英文摘要:

We have studied phenomenological implications of several family non-universal U(1)$^\prime$ sub-models in the U(1)$^\prime$-extended Minimal Supersysmmetric Standard Model (UMSSM) possesing an extra down quark type exotic field. In doing this, we have started by enforcing anomaly cancellation criteria to generate a number of solutions in which the extra U(1)$^\prime$ charges of the particles are treated as free parameters. We have then imposed existing bounds coming from colliders and astrophysical observations on the assumed sub-models and observed that current limits dictate certain charge orientations, for instance, $Q_{H_u}\sim Q_{H_d}$ is preferred in general and the charge of the singlet $Q_S$ cannot be very small ($|Q_S|>$ 0.4) even if any of the charges is allowed to take any value within the $[-1, 1]$ range. We have finally studied the potential impact of such non-universal charges on $Z'$ mediated processes and made predictions for existing and future experiments. It has turned out that UMSSMs with or without the presence of light exotic quarks can yield distinguisable signatures if non-universal charges are realised in the leptonic sector of such models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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