SU (5) orientifolds, Yukawa couplings, stringy instantons and proton decay
SU (5) orientifolds, Yukawa couplings, stringy instantons and proton decay
复制标题
DOI：
10.1016/j.nuclphysb.2009.12.012
复制
发表时间：
2009-09
期刊：
影响因子：
--
通讯作者：
E. Kiritsis;M. Lennek;Bert Schellekens
中科院分区：
文献类型：
--
作者：
E. Kiritsis;M. Lennek;Bert Schellekens
在标准和翻转情况下，构造了一类具有蝌蚪抵消的SU(5)取向折叠真空。本文对定向折线真空中高达四次的超势耦合进行了一般分析，并确定了所需的汤川耦合和重子数违反耦合的性质。我们指出，成功地产生摄动禁止汤川耦合需要一个一般灾难性的质子衰变率，从一个相关的超势四次项，由相同的瞬子效应产生。我们在我们构建的SU(5)真空中寻找产生缺失汤川耦合的适当的瞬子效应，并在其中的一小部分中找到它们。
We construct a large class of SU(5) orientifold vacua with tadpole cancellation both for the standard and the flipped case. We give a general analysis of superpotential couplings up to quartic order in orientifold vacua and identify the properties of needed Yukawa couplings as well as the baryon number violating couplings. We point out that successful generation of the perturbatively forbidden Yukawa couplings entails a generically disastrous rate for proton decay from an associated quartic term in the superpotential, generated from the same instanton effects. We search for the appropriate instanton effects that generate the missing Yukawa couplings in the SU(5) vacua we constructed and find them in a small subset of them.