Measurement of the differential $\gamma +2b$-jet cross section and the ratio $\sigma$($\gamma +2b$-jets)/$\sigma$($\gamma +b$-jet) in $p\bar{p}$ collisions at $\sqrt{s}$=1.96 TeV

D0 Collaboration

We present the first measurements of the differential cross section $d\sigma /d{p}_T^{\gamma }$ for the production of an isolated photon in association with at least two $b$-quark jets. The meas…