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l(i) -> l(j)gamma decays within a model involving a universal extra dimension

机译:l(i)-> l(j)伽玛在涉及通用额外维数的模型中的衰减

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摘要

Flavor-changing radiative lepton decays of the l(i) --> l(j)gamma type are studied within a model involving a universal extra dimension. Loop amplitudes where intermediate fermions and scalar bosons have commensurate masses may be quite large since the quadratic suppression factor reduces to a linear one in this case. The situation where fermions and scalar bosons have commensurate masses in a loop is realized in a model featuring universal extra dimensions. The contribution of Kaluza-Klein towers to the l(i) --> l(j)gamma decay amplitude is explicitly calculated. However, the enhancement expected in the amplitude on the basis of general considerations disappears because of the maximal degeneracy of massive-neutrino tower modes associated with different generations.
机译:在涉及通用额外维度的模型中研究了l(i)-> l(j)gamma类型的变味辐射轻子衰变。中间费米子和标量玻色子具有相称质量的环路幅度可能会很大,因为在这种情况下,二次抑制因子减小为线性。在具有普遍额外尺寸的模型中,实现了费米子和标量玻色子成环相称的情况。明确计算了Kaluza-Klein塔对l(i)-> l(j)gamma衰减幅度的贡献。然而,由于与不同世代相关的大中微子塔模态的最大简并性,基于一般考虑而期望的振幅增强消失了。

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