New contribution to dimension-five operators on proton decay in anomaly mediation scenarioNaoyuki Haba1 and Nobuchika Okada2, 3
1 Physik-Department, Technishe Universität München - James-Franck Strasse, D-85748 Garching, Germany, EU
2 Theory Division, KEK, Tsukuba 305-0801, Japan
3 Department of Particle and Nuclear Physics, The Graduate University for Advanced Studies (Sokendai) Oho 1-1, Tsukuba 305-0801, Japan
received 22 February 2008; accepted in final form 25 April 2008; published June 2008
published online 3 June 2008
In supergravity, effective superpotential relevant to dimension-five operators on proton decay processes also leads to supersymmetry-breaking terms among sfermions, dimension-four operators. These dimension-four operators induce the dimension-five operators through 1-loop diagrams dressed by gauginos. We find that, in a class of models with the anomaly mediation, the 1-loop contributions can be comparable to those at the tree level. Therefore, such operators have a great impact on the proton decay rate. Depending on a universal phase of gaugino masses and soft mass spectrum, the proton decay rate can be enhanced or suppressed.
12.60.Jv - Supersymmetric models.
12.10.-g - Unified field theories and models.
11.30.Pb - Supersymmetry.
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