One important test is the parity of the particle: how its mirror image behaves. In a mirror, even-parity particles look the same, whereas odd-parity particles appear reversed. The standard model Higgs boson is a scalar, a spin-
0even-parity particle. But there are many models that include a spin- 0odd-parity particle known as a pseudoscalar.
Turns out that the result points strongly towards the even-parity particle, which is consistent with the Standard Model Higgs.