Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-02-18
Phys.Rev.D71:116004,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 4 figures. v2: typo in eq. (5.30) fixed
Scientific paper
10.1103/PhysRevD.71.116004
I present the two-loop self-energy functions for scalar bosons in a general renormalizable theory, within the approximation that vector bosons are treated as massless or equivalently that gauge symmetries are unbroken. This enables the computation of the two-loop physical pole masses of scalar particles in that approximation. The calculations are done simultaneously in the mass-independent \bar{MS}, \bar{DR}, and \bar{DR}' renormalization schemes, and with arbitrary covariant gauge fixing. As an example, I present the two-loop SUSYQCD corrections to squark masses, which can increase the known one-loop results by of order one percent. More generally, it is now straightforward to implement all two-loop sfermion pole mass computations in supersymmetry using the results given here, neglecting only the electroweak vector boson masses compared to the superpartner masses in the two-loop parts.
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