Associated charged Higgs and and W boson production in the MSSM at the CERN large hadron collider

We investigate the viability of observing charged Higgs bosons (H-+/-) produced in association with W bosons at the CERN large hadron collider, using the leptonic decay H+ -> tau(+) nu(tau) and hadronic W decay, within diffrent scenarios of the minimal supersymmetric standard model (MSSM) with both real and complex parameters. Performing a parton level study we show how the irreducible standard model background from W + 2 jets can be controlled by applying appropriate cuts and find that the size of a possible signal depends on the cuts needed to suppress QCD backgrounds and misidentifications. In the standard maximal mixing scenario of the MSSM we find a viable signal for large tan beta and intermediate H-+/- masses (similar to m(t)) when using softer cuts (p perpendicular to , p perpendicular to tau(jet) > 50 GeV), whereas for harder cuts (p perpendicular to, p perpendicular to tau(jet) > 100 GeV) we only find a viable signal for very large tan beta (greater than or similar to 50). We have also investigated a special class of MSSM scenarios with large mass splittings among the heavy Higgs bosons where the cross-section can be resonantly enhanced by factors up to one hundred, with a strong dependence on the CP-violating phases. Even so we fund that the signal after cuts remains small except for small masses (less than or similar to m(t)) when using the softer cuts. Finally, in all the scenarios we have investigated we have only found small CP-asymmetries.