Does particle creation mechanism favour formation of black hole or naked singularity? Sudipto Bhattacharjee, Subhajit Saha and Subenoy Chakraborty Eur. Phys. J. C, 78 6 (2018) 488 Published online: 12 June 2018 DOI: 10.1140/epjc/s10052-018-5965-z