Confronting dark fermion with a doubly charged Higgs in the left–right symmetric model Shyamashish Dey, Purusottam Ghosh and Santosh Kumar Rai Eur. Phys. J. C, 82 10 (2022) 876 Published online: 05 October 2022 DOI: 10.1140/epjc/s10052-022-10778-z