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Asymptotic freedom in strong magnetic fields.
M A Andreichikov1, V D Orlovsky, Yu A Simonov
1Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117118 Moscow, Russia.
Physical Review Letters
|May 18, 2013
Summary
Strong magnetic fields can cause QCD mass collapse. However, quark-antiquark loop corrections significantly soften this effect, leading to logarithmic damping of gluon interactions in high magnetic fields.
Area of Science:
- Quantum Chromodynamics (QCD)
- High-energy physics
- Strong magnetic field effects
Background:
- Perturbative gluon exchange interactions in quark-antiquark (qq̄) or three-quark (3q) systems are enhanced by magnetic fields.
- This enhancement can lead to a phenomenon termed 'magnetic collapse of QCD', where system masses vanish or decrease indefinitely.
Purpose of the Study:
- To investigate the impact of quark-antiquark loop corrections on the magnetic collapse phenomenon in QCD.
- To analyze the behavior of gluon exchange interactions under strong magnetic fields.
Main Methods:
- One-loop correction analysis of perturbative gluon exchange.
- Theoretical investigation of quark-antiquark and three-quark systems in magnetic fields.
Main Results:
- Quark-antiquark loop contributions considerably soften the magnetic collapse of QCD.
- The gluon exchange interaction exhibits approximate logarithmic damping (
≈O(1/ln|eB|)) at large magnetic fields, similar to the Coulomb case in Quantum Electrodynamics (QED).
Conclusions:
- Quark-antiquark loop corrections play a crucial role in mitigating the extreme effects of magnetic fields on QCD systems.
- The findings suggest a more stable behavior of QCD matter under strong magnetic fields than previously predicted by simpler models.
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