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Multi-TeV scalars are natural in minimal supergravity

Feng¹, Matchev, Moroi

¹School of Natural Sciences, Institute for Advanced Study, Princeton, New Jersey 08540, USA.

Physical Review Letters

|October 6, 2000

Summary

Minimal supergravity models can predict heavy superpartners, including squarks and sleptons, that are beyond the Large Hadron Collider

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Area of Science:

High Energy Physics
Particle Physics
Supersymmetry

Background:

Supersymmetry (SUSY) theories introduce superpartners for known particles.
Minimal supergravity (mSUGRA) is a well-motivated SUSY model.
The naturalness problem in particle physics questions why the Higgs boson mass is not much larger.

Purpose of the Study:

To investigate regions of mSUGRA parameter space where superpartners are heavy.
To determine if these heavy superpartners are consistent with a fixed top quark mass.
To understand the implications for collider searches of supersymmetry.

Main Methods:

Analysis of mSUGRA parameter space.
Renormalization group running of parameters.
Focus point mechanism in scalar mass evolution.

Main Results:

Identified natural regions in mSUGRA parameter space where squarks, sleptons, and heavy Higgs scalars exceed 1 TeV.
These heavy particles may be beyond the reach of the Large Hadron Collider (LHC).
The findings are explained by focus point renormalization group behavior.

Conclusions:

The focus point mechanism in mSUGRA can lead to a natural scenario with heavy superpartners.
The choice of fundamental parameters is crucial for naturalness arguments.
This has significant implications for experimental searches for supersymmetry at colliders like the LHC.

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