These processes represent the production of a W boson which subsequently decays leptonically, in association with a single bottom quark, exploiting the weak transitions c → b and u → b. This is produced at leading order by an initial state which contains a charm quark (or the CKM suppressed u quark) and a gluon, e.g c(-p1) + g(p2) → W+(→ ν(p3) + e+(p4)) + b(p5) and u(-p1) + g(p2) → W+(→ ν(p3) + e+(p4)) + b(p5) or the charge conjugate processes for W-. This process is somewhat analogous to single top production.
The effect of the bottom quark mass is included throughout the calculation. For this case the CKM matrix elements V cb and V ub, (if they are equal to zero in the input data file, mdata.f) are set equal to 0.041 and 0.00347 respectively. Otherwise the non-zero values specified in mdata.f are used. The calculation of this process may be performed at LO and NLO.
When removebr is true, the W boson does not decay.
nplotter_auto.f is the default plotting routine.