Non-decoupling two-loop corrections to (g-2)(mu) from fermion/sfermion loops in the MSSM

作者：Fargnoli H G; Gnendiger C; Passehr S; Stoeckinger D^*; Stoeckinger Kim H

来源：Physics Letters B, 2013, 726(4-5): 717-724.

DOI：10.1016/j.physletb.2013.09.034

Two-loop contributions to the muon (g - 2) from fermion/sfermion loops in the MSSM are presented, and an overview of the full MSSM prediction for (g - 2) is given with emphasis on the behaviour in scenarios which are compatible with LHC data, including scenarios with large mass splittings. Compared to all previously known two-loop contributions, the fermion/sfermion loop contributions can yield the largest numerical results. The new contributions contain the important universal quantities Delta alpha and Delta rho, and for large sfermion masses the contributions are non-decoupling and logarithmically enhanced. We find up to 15% (30%) corrections for sfermion masses in the 20 TeV (1000 TeV) range.

• 出版日期2013-11-4