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arXiv 0912.4737hep-phastro-ph.CO
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极小超对称混合暴胀、翻转SU(5)和质子衰变

Minimal Supersymmetric Hybrid Inflation, Flipped SU(5) and Proton Decay

Mansoor Ur Rehman, Qaisar Shafi, Joshua R. Wickman

摘要:

最小超对称混合暴胀利用一个正则Kahler势和一个可重整化的超势,该超势通过施加U(1)R-对称性而唯一确定。在计算标量谱指数$n_s$时,我们考虑了辐射和超重力修正引起的树能级势的修改,以及软超对称破缺项与允许暴胀子的负软质量平方项的贡献。所有这些贡献都在实现WMAP优选的0.96-0.97范围内的$n_s$值方面发挥作用。U(1)R对称性在翻转SU(5)中起着重要的作用,它消除了麻烦的五维质子衰变。质子通过六维算符衰变为$e^+ π^0$,这是由超重规范玻色子交换产生的,其寿命为$10^{34}$ - $10^{36}$年。

英文摘要:

Minimal supersymmetric hybrid inflation utilizes a canonical Kahler potential and a renormalizable superpotential which is uniquely determined by imposing a U(1) R-symmetry. In computing the scalar spectral index $n_s$ we take into account modifications of the tree level potential caused by radiative and supergravity corrections, as well as contributions from the soft supersymmetry breaking terms with a negative soft mass-squared term allowed for the inflaton. All of these contributions play a role in realizing $n_s$ values in the range 0.96-0.97 preferred by WMAP. The U(1) R-symmetry plays an important role in flipped SU(5) by eliminating the troublesome dimension five proton decay. The proton decays into $e^+ π^0$ via dimension six operators arising from the exchange of superheavy gauge bosons with a lifetime of order $10^{34}$-$10^{36}$ years.

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