Lattice QCD study of the ${\chi }_{c1}\to J/\psi \gamma$ decay

D. Bečirević, R. Di Palma, R. Frezzotti +4

We present the results of our lattice QCD computation of the electric ($E_1$) and magnetic $(M_2)$ form factors relevant to the ${\chi }_{c1}\to J/\psi \gamma$ decay by using the gauge fiel…