Top Quark Pairs at High Invariant Mass - A Model-Independent Discriminator of New Physics at the LHC
Abstract
We study top quark pair production to probe new physics at the LHC. We propose reconstruction methods for
t
t
¯
semileptonic events and use them to reconstruct the
t
t
¯
invariant mass. The angular distribution of top quarks in their c.m. frame can determine the spin and production subprocess for each new physics resonance. Forward-backward asymmetry and CP-odd variables can be constructed to further delineate the nature of new physics. We parametrize the new resonances with a few generic parameters and show high invariant mass top pair production may provide an early indicator for new physics beyond the Standard Model.