Issue
EPL
Volume 82, Number 6, June 2008
Article Number 61001
Number of page(s) 5
Section The Physics of Elementary Particles and Fields
DOI http://dx.doi.org/10.1209/0295-5075/82/61001
Published online 03 June 2008
EPL, 82 (2008) 61001
DOI: 10.1209/0295-5075/82/61001

New contribution to dimension-five operators on proton decay in anomaly mediation scenario

Naoyuki 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

haba@phys.sci.osaka-u.ac.jp
okadan@post.kek.jp

received 22 February 2008; accepted in final form 25 April 2008; published June 2008
published online 3 June 2008

Abstract
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.

PACS
12.60.Jv - Supersymmetric models.
12.10.-g - Unified field theories and models.
11.30.Pb - Supersymmetry.

© EPLA 2008