Abstract

The pole mass of the gluino is diagrammatically calculated to the two-loop order in SUSY QCD as a function of the running parameters in the Lagrangian, for the gluino and squarks sufficiently heavier than the quarks. The O(αs2) correction shifts the gluino mass by typically 1–2%, which may be larger than the expected accuracy of the mass determination at future colliders.

Highlights

  • If supersymmetry (SUSY) with the breaking scale around 1 TeV is a solution to the hierarchy problem between the electroweak scale and the Planck/grand unification scale, all particles in the standard model have their superpartners with masses not much higher than the electroweak scale

  • One of the main motivations for these studies is the investigation of the SUSY breaking mechanism in the unified theory

  • Structure of the soft SUSY breaking at higher scale provides an important clue to the SUSY breaking mechanism in the unified theory

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Summary

Introduction

If supersymmetry (SUSY) with the breaking scale around 1 TeV is a solution to the hierarchy problem between the electroweak scale and the Planck/grand unification scale, all particles in the standard model have their superpartners with masses not much higher than the electroweak scale. The soft SUSY breaking parameters may be extracted from precision measurements at future colliders [2, 3], and extrapolated to much higher scale [4, 5] by renormalization group equations. To the masses of the particles, for example, two-loop corrections to the top and bottom quarks [9], squarks in the first two generations [10], and Higgs bosons [11] have been calculated in the framework of the minimal SUSY standard model (MSSM) [12].

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