Measurement of the W + jet cross section at CDF

a measurement of w ？ en + n-jet cross sections in p$\bar{p}$ collisions at ？s = 1.96 tev using the collider detector at fermilab in run ii is presented. the measurement is based on an integrated luminosity of 320 pb-1, and includes events with jet multiplicity from > 1 to > 4. in each jet multiplicity sample the differential and cumulative cross sections with respect to the transverse energy of the nth-leading jet are measured. for w+ > 2 jets the differential cross section with respect to the 2-leading jets invariant mass mj1j2 and angular separation drj1j2 is also reported. the data are compared to predictions from monte carlo simulations.