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arXiv 1007.0432hep-phhep-ex
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具有矢量多重态的MSSM扩张中的顶夸克电偶极矩

The top quark electric dipole moment in an MSSM extension with vector like multiplets

Tarek Ibrahim, Pran Nath

摘要:

在MSSM模型的推广下,采用与第三代夸克混合的矢量多重态模型计算了顶夸克的电偶极矩。这样的混合允许新的CP违反相。包括这些新的CP阶段,在这类模型的顶部的EDM计算。顶部的EDM产生于涉及W、Z交换的循环,以及涉及电荷伴子、中性伴子、胶子和矢量多重态及其超伴子的交换。对顶夸克EDM的分析比对轻夸克的分析更复杂,因为外费米子的质量,在这种情况下顶夸克的质量相对于环内的质量不能忽略。一个数值分析,它表明,顶部EDM可以接近$10^{-19} ecm$符合目前的限制EDM的电子,中子和原子EDM。一个尺寸为$10^{-19}ecm$的顶级EDM可以在对撞机实验中使用,如ILC。

英文摘要:

The electric dipole moment (EDM) of the top quark is calculated in a model with a vector like multiplet which mixes with the third generation in an extension of the MSSM. Such mixings allow for new CP violating phases. Including these new CP phases, the EDM of the top in this class of models is computed. The top EDM arises from loops involving the exchange of the W, the Z as well as from the exchange involving the charginos, the neutralinos, the gluino, and the vector like multiplet and their superpartners. The analysis of the EDM of the top is more complicated than for the light quarks because the mass of the external fermion, in this case the top quark mass cannot be ignored relative to the masses inside the loops. A numerical analysis is presented and it is shown that the top EDM could be close to $10^{-19} ecm$ consistent with the current limits on the EDM of the electron, the neutron and on atomic EDMs. A top EDM of size $10^{-19}ecm$ could be accessible in collider experiments such as the ILC.

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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