The NMSSM and string theory

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• 作者：Oleg Lebedev ; Saú ; l Ramos-Sá ; nchez
• 刊名：Physics Letters B
• 出版年：2010
• 出版时间：1 February 2010
• 年：2010
• 卷：684
• 期：1
• 页码：48-51
• 全文大小：150 K

文摘

We study the possibility of constructing the NMSSM from the heterotic string. String-derived NMSSMs are much more rare than MSSMs due to the extra requirement that there exist a light singlet which couples to the Higgs pairs. They share the common feature that the singlet self-interactions are typically suppressed, leading to either the “decoupling” or the Peccei–Quinn limit of the NMSSM. In the latter case, the spectrum contains a light pseudoscalar which may be relevant to the MSSM fine-tuning problem. We provide a heterotic orbifold example of the NMSSM with approximate Peccei–Quinn symmetry, whose origin lies in the string selection rules combined with our choice of the vacuum configuration.