One-loop algebras and fixed flow trajectories in adjoint multi-scalar gauge theory
Authors: Nadia Flodgren, Bo Sundborg
AI-generated Key Points
- Investigate one-loop renormalization of 4-dimensional $SU(N)$ Yang-Mills theory with $M$ adjoint representation scalar multiplets related by an $O(M)$ symmetry
- One-loop beta function of gauge coupling $g^2$ vanishes when $M=22, related to D3 branes in critical bosonic string theory in a spacetime dimension of $D=26$
- Scalar self-couplings $\lambda$ disrupt one-loop conformal invariance in large $N$ limit
- Real fixed flows (fixed points of $\lambda/g^2$) only for values of $M\ge 406, incompatible with one-loop fixed points of gauge coupling and scalar couplings
- Develop and verify algebraic approach to one-loop renormalization group
- Non-associative algebra of marginal couplings characterizes the approach
- Most resulting RG flows suffer from strong coupling in ultraviolet and infrared regimes, weakly coupled solutions exist only for finely tuned solutions with $M\ge 406$
- Limitations to validity of one-loop RG flow analysis revealed
- Connecting multiscalar adjoint gauge theory to bosonic D3-brane model not straightforward
- Initial connection between critical dimension 26 for bosonic string and vanishing one loop gauge coupling beta function in 4 dimensions for M = 22 does not withstand corrections from interactions.
Abstract: We study the one loop renormalisation of 4d $SU(N)$ Yang-Mills theory with $M$ adjoint representation scalar multiplets related by $O(M)$ symmetry. General $M$ are of field theoretic interest, and the 4d one loop beta function of the gauge coupling $g^2$ vanishes for the case $M=22$, which is intriguing for string theory. This case is related to D3 branes of critical bosonic string theory in $D=22+4=26$. An RG fixed point could have provided a definition for a purely bosonic AdS/CFT, but we show that scalar self-couplings $\lambda$ ruin one-loop conformal invariance in the large $N$ limit. There are real fixed flows (fixed points of $\lambda/g^2$) only for $M\ge 406$, rendering one-loop fixed points of the gauge coupling and scalar couplings incompatible. We develop and check an algebraic approach to the one-loop renormalisation group which we find to be characterised by a non-associative algebra of marginal couplings. In the large $N$ limit, the resulting RG flows typically suffer from strong coupling in both the ultraviolet and the infrared. Only for $M\ge 406$ fine-tuned solutions exist which are weakly coupled in the infrared.
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