The τ-polarisation test for the H/A→τ+τ− signal at the LHC

The correlation between the two τ-polarisations is predicted to be opposite (+−/−+) for the H/A→τ+τ− signal, while it corresponds to the same sign combinations for the Drell–Yan (++/−−) and tt̄ (−−) backgrounds. We show that this correlation can serve as a distinctive test to confirm the presence of the MSSM Higgs bosons H and A in their hadronic τ+τ− decay channels at the LHC.