Characters and group invariant polynomials of (super)fields: road to “Lagrangian” Upalaparna Banerjee, Joydeep Chakrabortty, Suraj Prakash and Shakeel Ur Rahaman Eur. Phys. J. C, 80 10 (2020) 938 Published online: 10 October 2020 DOI: 10.1140/epjc/s10052-020-8392-x