Supersymmetric renormalization of the CKM matrix and new constraints on the squark mass matrices

Journal Article · Sun Feb 01 00:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.035018· OSTI ID:21259945

Crivellin, Andreas; Nierste, Ulrich ^[1]

---

1. Institut fuer Theoretische Teilchenphysik, Karlsruhe Institute of Technology, Universitaet Karlsruhe, D-76128 Karlsruhe (Germany)

We compute the finite renormalization of the Cabibbo-Kobayashi-Maskawa matrix induced by gluino-squark diagrams in the minimal supersymmetric standard model with nonminimal sources of flavor violation. Subsequently we derive bounds on the flavor-off-diagonal elements of the squark mass matrices by requiring that the radiative corrections to the Cabibbo-Kobayashi-Maskawa elements do not exceed the experimental values. Our constraints on the associated dimensionless quantities {delta}{sub ij}{sup dLR}, j>i, are stronger than the bounds from flavor-changing neutral current (FCNC) processes if the gluino and squarks are heavier than 500 GeV. Our bound on |{delta}{sub 12}{sup uLR}| is stronger than the FCNC bound from D-D mixing for superpartner masses above 900 GeV. We further find a useful bound on |{delta}{sub 13}{sup uLR}|, for which no FCNC constraint is known. Our results imply that it is still possible to generate all observed flavor violation from the soft supersymmetry-breaking terms without conflicting with present-day data on FCNC processes. We suggest that a flavor symmetry renders the Yukawa sector flavor-diagonal and the trilinear supersymmetry-breaking terms are the spurion fields breaking this flavor symmetry. We further derive the dominant supersymmetric radiative corrections to the couplings of charged-Higgs bosons and charginos to quarks and squarks.

• OSTI ID: 21259945
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 3; Other Information: DOI: 10.1103/PhysRevD.79.035018; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHARGED PARTICLES
COMPUTERIZED SIMULATION
COUPLING
FLAVOR MODEL
GEV RANGE 100-1000
HIGGS BOSONS
KOBAYASHI-MASKAWA MATRIX
MASS
MIXING
NEUTRAL CURRENTS
QUARKS
RADIATIVE CORRECTIONS
RENORMALIZATION
SPARTICLES
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY BREAKING
YUKAWA POTENTIAL