Gauge vs. Gravity mediation in models with anomalous U(1)'s

Autor:	Dudas, E., Mambrini, Y., Pokorski, S., Romagnoni, A., Trapletti, M.
Rok vydání:	2008
Předmět:	High Energy Physics - Theory High Energy Physics - Phenomenology
Zdroj:	JHEP 0903:011,2009
Druh dokumentu:	Working Paper
DOI:	10.1088/1126-6708/2009/03/011
Popis:	In an attempt to implement gauge mediation in string theory, we study string effective supergravity models of supersymmetry breaking, containing anomalous gauge factors. We discuss subtleties related to gauge invariance and the stabilization of the Green-Schwarz moduli, which set non-trivial constraints on the transmission of supersymmetry breaking to MSSM via gauge interactions. Given those constraints, it is difficult to obtain the dominance of gauge mediation over gravity mediation. Furthermore, generically the gauge contributions to soft terms contain additional non-standard terms coming from D-term contributions. Motivated by this, we study the phenomenology of recently proposed hybrid models, where gravity and gauge mediations compete at the GUT scale, and show that such a scenario can respect WMAP constraints and would be easily testable at LHC. Comment: 40 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0809.5064 Zobrazit plný text záznamu View this record from Arxiv