A Note on Softly Broken MQCD
J.L.F. Barbon, A. Pasquinucci
TL;DR
This paper examines softly broken MQCD configurations with matter from semi-infinite D4-branes, showing they do not fully replicate low-energy QCD physics due to limitations in capturing infrared dynamics.
Contribution
It demonstrates that matter in these models does not introduce supersymmetry breaking parameters, highlighting the limitations of softly broken MQCD in modeling infrared QCD behavior.
Findings
Matter sector does not add supersymmetry breaking parameters
The dominant supersymmetry breaking operator is the gaugino mass term
Softly broken MQCD models fail to reproduce low-energy QCD physics
Abstract
We consider generic MQCD configurations with matter described by semi-infinte D4-branes and softly broken supersymmetry. We show that the matter sector does not introduce supersymmetry breaking parameters so that the most relevant supersymmetry breaking operator at low energies is the gaugino mass term. By studying the run-away properties of these models in the decoupling limit of the adjoint matter, we argue that these softly broken MQCD configurations fail to capture the infrared physics of QCD at scales below the gaugino mass scale.
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