Fermionic unparticles, gauge interactions and the β function Rahul Basu, Debajyoti Choudhury and H. S. Mani Eur. Phys. J. C, 61 3 (2009) 461-470 Published online: 08 April 2009 DOI: 10.1140/epjc/s10052-009-1022-2