Renormalization group and decoupling in curved space. 2. The Standard model and beyond
Mar, 200326 pages
Published in:
- JHEP 06 (2003) 004
e-Print:
- hep-ph/0303124 [hep-ph]
Report number:
- DF-UFJF-03-01
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Abstract:
We continue the study of the renormalization group and decoupling of massive fields in curved space, started in the previous article and analyse the higher derivative sector of the vacuum metric-dependent action of the Standard Model. The QCD sector at low-energies is described in terms of the composite effective fields. For fermions and scalars the massless limit shows perfect correspondence with the conformal anomaly, but similar limit in a massive vector case requires an extra compensating scalar. In all three cases the decoupling goes smoothly and monotonic. A particularly interesting case is the renormalization group flow in the theory with broken supersymmetry, where the sign of one of the beta-functions changes on the way from the UV to IR.- renormalization group
- decoupling
- space-time
- field theory: massive
- derivative: high
- quantum chromodynamics
- anomaly: conformal
- supersymmetry
- effective action
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