Weak-triplet, color-octet scalars and the CDF dijet excess

Understand

We extend the standard model to include a weak-triplet and color-octet scalar.

• This `octo-triplet' field consists of three particles, two charged and one neutral, whose masses and renormalizable interactions depend only on two new parameters.
• The charged octo-triplet decay into a W boson and a gluon is suppressed by a loop factor and an accidental cancellation.
• Thus, the main decays of the charged octo-triplet may occur through higher-dimensional operators, mediated by a heavy vectorlike fermion, into quark pairs.