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arXiv · 2507.19083

Gauge interactions and the Galilean limit

Ashis Saha·Rabin Banerjee·Sunandan Gangopadhyay
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Abstract

The gauge invariant minimal couplings for a class of relativistic free matter fields with global symmetry (related to usual charge conservation) have been obtained by incorporating an iterative Noether mechanism. Non-relativistic reduction of both matter and gauge sectors of the obtained interacting theory is then performed simultaneously which in turn yield a set of new effective actions which are invariant under the Galilean relativistic framework. To be precise, we show that one can obtain the Schrödinger field theory coupled to Galilean electromagnetism from the scalar quantum electrodynamics theory. Higher derivative corrections have also been included for which the non-relativistic reductions have been consistently carried out once again. On the other hand, the action for quantum electrodynamics leads to the Galilean Pauli-Schrödinger theory where the gauge field is non-relativistic or Galilean. Further, some novel relations are found (in both the electric and magnetic limits) between various components appearing in the Galilean avatar of electrodynamics.

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Ashis Saha, Rabin Banerjee, Sunandan Gangopadhyay. 2025-10-11. Gauge interactions and the Galilean limit. https://doi.org/10.1140/epjc%2Fs10052-025-14878-4

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