Resummation of tan-beta-enhanced supersymmetric loop corrections beyond the decoupling limit

Details Resummation of tan-beta-enhanced supersymmetric loop corrections beyond the decoupling limit Resummation of tan-beta-enhanced supersymmetric loop corrections beyond the decoupling limit

2009-07-30

arxiv.org/abs/0907.5408v4

JHEP 0910:081,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

46 pages, 17 figures. Typos in eqs. (12),(13) corrected. Eq. (97) and fig. 14 corrected. Conclusions unchanged

Scientific paper

10.1088/1126-6708/2009/10/081

We study the Minimal Supersymmetric Standard Model with Minimal Flavour Violation for the case of a large parameter tanbeta and arbitrary values of the supersymmetric mass parameters. We derive several resummation formulae for tanbeta-enhanced loop corrections, which were previously only known in the limit of supersymmetric masses far above the electroweak scale. Studying first the renormalisation-scheme dependence of the resummation formula for the bottom Yukawa coupling, we clarify the use of the sbottom mixing angle in the supersymmetric loop factor Delta_b. As a new feature, we find tan-beta-enhanced loop-induced flavour-changing neutral current (FCNC) couplings of gluinos and neutralinos which in turn give rise to new effects in the renormalisation of the Cabibbo-Kobayashi-Maskawa matrix and in FCNC processes of B mesons. For the chromomagnetic Wilson coefficient C_8, these gluino-squark loops can be of the same size as the known chargino-squark contribution. We discuss the phenomenological consequences for the mixing-induced CP asymmetry in B_d -> phi K_S. We further quote formulae for B_s -> mu^+ mu^- and B_s-B_s-bar mixing valid beyond the decoupling limit and find a new contribution affecting the phase of the B_s-B_s-bar mixing amplitude. Our resummed tan-beta-enhanced effects are cast into Feynman rules permitting an easy implementation in automatic calculations.

Affiliated with

Also associated with

No associations

Rating

Resummation of tan-beta-enhanced supersymmetric loop corrections beyond the decoupling limit does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Resummation of tan-beta-enhanced supersymmetric loop corrections beyond the decoupling limit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resummation of tan-beta-enhanced supersymmetric loop corrections beyond the decoupling limit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-469539