We reexamine the tW+X single top-quark production process, which is important at the CERN LHC, unlike what happens at the Fermilab Tevatron. Special attention is paid to the treatment of the 2-->2[Wt] process and part of its next-to-leading correction, the 2-->3[Wtb] process. We show that the 2-->3[Wtb] process has to be correctly taken into account with a proper subtraction of the top-pair contribution, and that it has qualitatively different kinematical distributions from the 2-->2[Wt] process. We present the total cross section of the tW+X production as being about 62 pb, and at the proper QCD scale equal to the top quark mass, suggest a method of combining the Wt and Wtb processes with gauge-invariant subtraction of the tt¯ part, which allows us to reproduce the kinematical properties correctly and perform a proper event simulation of the tW+X process in the whole kinematical region.
Physical Review D
- Pub Date:
- February 2001
- Top quarks;
- Hadron-induced high- and super-high-energy interactions;
- High Energy Physics - Phenomenology
- 8 pages, 4 figures